CN211036679U - Socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap - Google Patents
Socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap Download PDFInfo
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- CN211036679U CN211036679U CN201921218144.9U CN201921218144U CN211036679U CN 211036679 U CN211036679 U CN 211036679U CN 201921218144 U CN201921218144 U CN 201921218144U CN 211036679 U CN211036679 U CN 211036679U
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Abstract
The utility model provides a socket joint connecting structure of prefabricated pier stud and bearing platform of an assembled bridge, which comprises a bearing platform, prefabricated pier studs and an adjusting cushion block, wherein the bearing platform is provided with a bearing hole; a first template is arranged on the inner side wall of the socket hole; the lower section of the prefabricated pier stud is an insertion section inserted into a socket hole in a socket mode, a longitudinal main rib of the prefabricated pier stud is provided with a transverse section which is vertically bent inwards, and a plurality of transverse sections are bound and connected; the outer side wall of the insertion section is provided with a second template; the second template is fixedly connected with the longitudinal main rib of the prefabricated pier stud; a plurality of evenly distributed bearing reinforcing nails are arranged in each second annular groove on the second template; the adjusting cushion block is arranged between the bottom end of the inserting section and the bottom surface of the socket hole; self-compacting mortar is filled between the insertion section and the socket hole. The utility model discloses simple structure can satisfy and assemble pier structure bearing capacity, joint strength requirement, need not pre-buried numerous built-in fittings, need not to carry out the hole site butt joint of high accuracy, and the adjustable surplus is great, improves and assembles the efficiency of construction, reduces construction cost.
Description
Technical Field
The utility model belongs to the technical field of bridge construction engineering, especially, relate to a prefabricated pier stud of assembled bridge and socket joint connection structure of cushion cap.
Background
In the construction of the assembled bridge, the pier columns of the lower structure are prefabricated in a factory and connected with the bearing platform in a field hoisting and positioning mode, so that the influence on road traffic can be reduced to the greatest extent, the influence on the surrounding environment is reduced, the engineering quality is ensured, and the construction period is shortened.
The prefabricated pier stud is connected with the cushion cap and is the key technical problem that the assembled construction needs to solve, and the connection technology that is commonly used for prefabricated pier stud and cushion cap at present mainly has four kinds of connected modes:
(1) And (3) a wet joint connection mode, wherein the connection mode is that reserved steel bars at the top of the bearing platform and the bottom of the prefabricated pier stud are bound or welded, and then the joint concrete is poured by using a vertical mold. The pier connected by the method has large residual displacement after earthquake, poor self-resetting capability and complex field connection construction, needs steel bar fixing, template assembling and disassembling and concrete pouring operation, has large field workload, can cause cracking when joint concrete is subjected to temperature difference and shrinkage constraint action, can carry out next procedure construction after joint concrete reaches preset strength for a long time, has long occupied time and reduces the construction efficiency.
(2) The prestressed tendon connection mode is characterized in that vertical common steel bars between the prefabricated pier stud and the bearing platform are disconnected, post-tensioned prestressed tendons are adopted to replace the common steel bars, and the bearing platform and the prefabricated pier stud are assembled into a whole by applying prestress. The connecting mode cost is higher like this, and the pre-buried quantity of prestressing force pore canal is many, and positioning accuracy requires highly, easily receives the corrosion failure when prestressing tendons is not full in milk.
(3) Grouting sleeve connection mode, this kind of connection is in inserting the pre-buried sleeve in prefabricated pier stud bottom with the overhanging vertical reinforcement that the cushion cap top was reserved, perhaps inserts the pre-buried sleeve in cushion cap top with the overhanging vertical reinforcement that prefabricated pier stud bottom was reserved in, then pours into the non-shrink's high strength cement base grouting material into the sleeve, closely combines the reinforcing bar with the recess or the fin of sleeve inner wall after the grouting material sclerosis to assemble into wholly with cushion cap and prefabricated pier stud. The grouting sleeve plays a role in connecting the vertical steel bars of the pier column and the bearing platform, but the construction tolerance of the sleeve joint is small, as the prefabricated pier column and the bearing platform are generally connected in an alignment mode of more than 30-50 connecting points of the sleeves and the vertical steel bars, the positioning construction precision requirement of the reserved overhanging steel bars for the construction of the prefabricated embedded sleeve and the bearing platform of the pier column is very high, the field assembly construction can be adjusted with a small margin, the grouting process requirement for achieving full and compact grouting in the sleeve is also very high, and the phenomenon of incompletion is easy to occur to cause connection failure.
(4) The connection mode of the grouting metal corrugated pipe is that the outward extending reinforcing steel bar of the bearing platform or the prefabricated pier stud is inserted into the other embedded metal corrugated pipe which is assembled with the bearing platform or the prefabricated pier stud, and then the high-strength non-shrinkage cement-based grouting material is poured to anchor the inserted reinforcing steel bar, so that the bearing platform and the prefabricated pier stud are connected together to bear the force jointly. The length of the connected overhanging reinforcing steel bar is longer than that required by grouting sleeve connection, and the stress failure mechanism of the spliced pier structure under the action of earthquake load, the size and the type of the corrugated pipe, the position and the length of the inserted reinforcing steel bar and the like need more research.
In view of the defects of the prior art, a connecting structure of a prefabricated pier column and a bearing platform needs to be designed, the requirements of the bearing capacity and the connection strength of an assembled pier structure can be met, embedded parts such as numerous vertical connecting reinforcing steel bars or prestressed pore channels, reinforcing steel bar connecting sleeves and metal corrugated pipes do not need to be embedded during construction of the bearing platform and prefabrication of the pier column, high-precision alignment is not needed during on-site assembling construction, the allowance of adjustable alignment connection is large, assembling construction is simple, convenient, rapid and not easy to damage, the assembling construction efficiency is improved, and the construction cost is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a prefabricated pier stud of assembled bridge and socket joint structure of cushion cap, moreover, the steam generator is simple in structure, can satisfy and assemble pier structure bearing capacity, the joint strength requirement, need not pre-buried numerous vertical connecting bar of quantity or prestressed hole way when cushion cap construction and prefabricated pier stud, the bar connection sleeve, built-in fittings such as corrugated metal pipe, the construction is assembled on the spot and need not carry out the butt joint of highly accurate hole site, it is great to counterpoint to connect the adjustable surplus, it is simple and efficient and difficult impaired to assemble the construction, improve and assemble the efficiency of construction, construction cost is reduced.
The utility model discloses a realize through following technical scheme:
A socket joint connecting structure of a prefabricated pier column and a bearing platform of an assembled bridge comprises the bearing platform, the prefabricated pier column and an adjusting cushion block, wherein a bearing insertion hole is formed in the bearing platform;
A first template is arranged on the inner side wall of the socket hole, a first annular bulge and a first annular groove are formed on the inner surface and the outer surface of the first template, and the first annular bulge and the first annular groove are sequentially arranged to form a corrugated shape;
The lower section of the prefabricated pier stud is an insertion section inserted into the insertion hole in a socket mode, a longitudinal main rib of the prefabricated pier stud extends out of the bottom end of the insertion section and then is vertically bent inwards to form a transverse section, and a plurality of transverse sections are bound and connected;
The outer side wall of the insertion section is provided with a second template, the inner surface and the outer surface of the second template form a second annular bulge and a second annular groove, and the second annular bulge and the second annular groove are sequentially arranged to form a corrugated shape;
The second template is fixedly connected with the longitudinal main rib of the prefabricated pier stud, and a plurality of uniformly distributed bearing reinforcing nails are arranged in each second annular groove on the outer surface of the second template;
The adjusting cushion block is arranged between the bottom end of the inserting section and the bottom surface of the socket hole;
Self-compacting mortar is poured between the bottom end of the insertion section and the bottom surface of the socket hole and between the outer side wall of the insertion section and the inner side wall of the socket hole.
Compared with the prior art, the beneficial effects of the utility model are that: the structure is simple, the bearing capacity and the connection strength requirements of an assembled pier structure can be met, the longitudinal main rib of the prefabricated pier stud is bent vertically inwards after extending out of the bottom end of the insertion section to form a transverse section, a plurality of transverse sections are bound and connected together, the anchoring length of the steel bar of the socket joint connection of the prefabricated pier stud is increased, meanwhile, a first template is arranged on the inner side wall of the socket joint hole, a second template is arranged on the outer side wall of the insertion section, a plurality of bearing reinforcing nails are fixed in each second annular groove on the outer surface of the second template, an adjusting cushion block is arranged between the bottom surface of the bearing hole and the bottom end of the prefabricated pier stud, and the hole between the bearing hole and the insertion section is communicated, so that self-compacting mortar can be poured between the inner side wall of the socket joint hole and the insertion section and between the bottom surface of the socket joint hole and the bottom end of the insertion section together, and the integrity and, the overall stress performance and the anti-seismic performance of the connecting part of the prefabricated pier stud and the bearing platform are improved, and the minimum socket depth of the prefabricated pier stud is reduced, namely the embedding depth of the prefabricated pier stud is reduced, and the thickness of the bottom plate of the bearing platform can be correspondingly reduced, so that the overall thickness of the bearing platform is reduced, the concrete consumption can be greatly saved, and the construction cost is reduced; the longitudinal main reinforcements of the prefabricated pier column do not extend outwards, and a large number of vertical connecting reinforcements or embedded parts such as prestressed ducts, reinforcement connecting sleeves, metal corrugated pipes and the like do not need to be embedded, so that the processing and mounting requirements on the prefabricated template of the prefabricated pier column are reduced, and the prefabricated pier column is easier to turn, transport and lift; the prefabricated pier stud and the bearing platform are not connected through the steel bars, no steel bar welding connection work is performed during field assembly, the field operation amount is small, the hoisting operation can be rapidly completed, the influence on the construction field environment is reduced, and the construction cost is reduced; the prefabricated pier stud can be inserted into the bearing hole of the bearing platform without highly accurate hole site butt joint during assembling connection construction, the assembling construction is simple, convenient and quick, the construction process and the construction operation are simple, larger construction deviation can be allowed for the socket hole of the bearing platform, the requirement on the section size precision of the pier stud prefabrication construction is lower, and the adjustable allowance is larger.
Furthermore, the bearing reinforcing nail comprises a vertical end plate, a transverse horizontal plate and a vertical supporting plate, wherein the transverse horizontal plate and the vertical supporting plate are both vertically fixed on the vertical end plate, and the vertical supporting plate is positioned below the transverse horizontal plate, and the upper end of the vertical supporting plate is vertically and fixedly connected with the middle part of the transverse horizontal plate.
Further, the lower end of the vertical end plate is bent to a direction close to the insertion section. This setting is lifted by crane at prefabricated pier stud and is inserted the in-process of socket hole and play the effect of conveniently aiming at and making prefabricated pier stud descend smoothly.
Furthermore, a plurality of vent holes are formed in the transverse horizontal plate. This setting can ensure that the air bubble under the bearing reinforcing nail can fully escape when filling self-compaction mortar toward the bell and spigot hole, guarantees the filling quality of the self-compaction mortar that prefabricated pier stud and cushion cap are connected.
Furthermore, the bottom end of the insertion section is provided with an embedded steel plate at a position corresponding to the adjusting cushion block. The embedded steel plate plays a role in strengthening local bearing at the lower end of the prefabricated pier stud.
Further, the cross section of the part of the prefabricated pier stud between the position with the specified distance above the top surface of the bearing platform and the bottom end of the prefabricated pier stud is a circular solid section, and the cross section of the rest part of the prefabricated pier stud is a circular hollow section. The prefabricated pier column with the partial circular hollow section has less concrete consumption than the prefabricated pier column with the whole solid section, and the cost is saved.
Furthermore, the included angle between the two adjacent force bearing reinforcing nails in each second annular groove and the connecting line of the circle centers of the cross sections of the prefabricated pier columns is 15 degrees.
Further, the first template and the second template are both corrugated steel cylinders. After the bearing platform and the prefabricated pier stud are formed, the corrugated steel cylinder is not detached, the corrugated steel cylinder has the effects of hoop reinforcement and improvement of mechanical properties of a connecting and combining surface besides the effect of a construction template, the shearing resistance of the socket hole position is enhanced, the requirement on the thickness of a base plate of the bearing platform below the bottom end of the prefabricated pier stud can be effectively reduced, and the construction is simple and convenient.
Further, the surface of the corrugated steel cylinder is subjected to rough treatment to form a rough layer.
Furthermore, one end of the top layer steel bar in the bearing platform is bent downwards to form a U-shaped portion and is connected with the bottom layer steel bar in the bearing platform in a binding mode, and the bottom of the U-shaped portion is fixedly welded with the first template. This setting plays the effect of anti die-cut reinforcing bar, need not to set up anti die-cut reinforcing bar in addition.
Drawings
FIG. 1 is an axial sectional view of the prefabricated pier stud and bearing platform socket joint structure of the assembled bridge of the present invention;
3 FIG. 3 2 3 is 3 a 3 sectional 3 view 3 of 3 A 3- 3 A 3 in 3 the 3 socket 3 joint 3 connection 3 structure 3 of 3 the 3 prefabricated 3 pier 3 stud 3 and 3 the 3 bearing 3 platform 3 of 3 the 3 assembled 3 bridge 3 of 3 the 3 present 3 invention 3; 3
FIG. 3 is a partial enlarged view of the socket joint structure of the prefabricated pier stud and the bearing platform of the assembled bridge of the present invention (no self-compacting mortar is poured);
FIG. 4 is a side view of the bearing reinforcing nail in the fabricated bridge prefabricated pier stud and bearing platform socket joint connection structure of the present invention;
FIG. 5 is a top view of the bearing reinforcing nail in the fabricated bridge prefabricated pier stud and bearing platform socket joint connection structure of the present invention;
Fig. 6 is a B-B cross-sectional view of the bearing reinforcing nail in the prefabricated pier stud and bearing platform socket joint connection structure of the assembly type bridge of the utility model.
In the figure, 1-bearing platform, 11-first template, 111-first annular bulge, 112-first annular groove, 12-top-layer steel bar, 13-bottom-layer steel bar, 2-prefabricated pier stud, 21-insertion section, 22-longitudinal main bar, 23-second template, 231-second annular bulge, 232-second annular groove, 24-embedded steel plate, 3-adjusting cushion block, 4-bearing reinforcing nail, 41-vertical end plate, 42-horizontal plate, 421-vent hole, 43-vertical supporting plate and 5-self-compacting mortar.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
3 please 3 refer 3 to 3 fig. 3 1 3 to 3 fig. 3 3 3, 3 fig. 3 1 3 is 3 an 3 axial 3 sectional 3 view 3 of 3 the 3 prefabricated 3 pier 3 stud 3 and 3 the 3 bearing 3 platform 3 socket 3 joint 3 structure 3 of 3 the 3 assembled 3 bridge 3 of 3 the 3 present 3 invention 3, 3 fig. 3 2 3 is 3 an 3 a 3- 3 a 3 sectional 3 view 3 of 3 the 3 prefabricated 3 pier 3 stud 3 and 3 the 3 bearing 3 platform 3 socket 3 joint 3 structure 3 of 3 the 3 assembled 3 bridge 3 of 3 the 3 present 3 invention 3, 3 fig. 3 3 3 is 3 a 3 partial 3 enlarged 3 view 3 of 3 the 3 prefabricated 3 pier 3 stud 3 and 3 the 3 bearing 3 platform 3 socket 3 joint 3 structure 3 of 3 the 3 assembled 3 bridge 3 of 3 the 3 present 3 invention 3 ( 3 no 3 self 3- 3 compacting 3 mortar 3 is 3 filled 3 in 3 fig. 3 3 3) 3. 3 The utility model provides a prefabricated pier stud of assembled bridge and socket joint connection structure of cushion cap, includes cushion cap 1, prefabricated pier stud 2 and regulation cushion 3, is equipped with socket hole on the cushion cap 1, and the hypomere of prefabricated pier stud 2 is the insertion section 21 of socket joint in the socket hole, and regulation cushion 3 sets up between prefabricated pier stud 2 bottom and socket hole bottom surface, and it has self-compaction mortar 5 to fill between the bottom surface of socket hole and the bottom of insertion section 21 and between the inside wall of socket hole and the lateral wall of insertion section 21.
A first template 11 is arranged on the inner side wall of the socket hole, a first annular bulge 111 and a first annular groove 112 are formed on the inner surface and the outer surface of the first template 11, and the first annular bulge 111 and the first annular groove 112 are sequentially arranged to form a corrugated shape; after the bearing platform 1 is formed, the first template 11 is not detached. One end of the top layer steel bar 12 in the bearing platform 1 is bent downwards to form a U-shaped part and is connected with the bottom layer steel bar 13 in the bearing platform 1 in a binding mode, and the bottom of the U-shaped part is fixedly welded with the first template 11. This setting plays the effect of anti die-cut reinforcing bar, need not to set up anti die-cut reinforcing bar in addition. Specifically, the cross-section of the socket hole has a shape similar to the cross-section of the insertion section 21, and the size of the cross-section of the socket hole is larger than that of the cross-section of the insertion section 21.
The longitudinal main rib 22 of the prefabricated pier stud 2 extends out of the bottom end of the insertion section 21 and then is vertically bent inwards to form a transverse section, and a plurality of transverse sections are bound and connected together; a second template 23 is arranged on the outer side wall of the insertion section 21, a second annular bulge 231 and a second annular groove 232 are formed on the inner surface and the outer surface of the second template 23, and the second annular bulge 231 and the second annular groove 232 are sequentially arranged to form a corrugated shape; the second template 23 is fixedly connected with the longitudinal main rib 22 of the prefabricated pier column 2; after the prefabricated pier stud 2 is formed, the second template 23 is not detached, the first template 11 and the second template 23 have the functions of annular stirrups and improvement of mechanical properties of a connecting and combining surface except the function of a construction template, the shearing resistance of the socket hole position is enhanced, the requirement on the thickness of the bottom plate of the bearing platform 1 below the bottom end of the prefabricated pier stud 2 can be effectively reduced, and the construction is simple and convenient. A plurality of evenly distributed bearing reinforcing nails 4 are arranged in each second annular groove 232. The force bearing reinforcing nails 4 can reinforce the force bearing integrity and the seismic performance of the insertion section 21 of the prefabricated pier stud 2. Preferably, the bottom end of the insertion section 21 is provided with an embedded steel plate 24 at a position corresponding to the adjusting cushion block 3. The embedded steel plate 24 plays a role in strengthening local bearing of the lower end of the prefabricated pier stud 2.
The prefabricated pier stud 2 can adopt a rectangular solid section, a rectangular rounded solid section, a rectangular chamfered solid section, a circular hollow section, a circular solid section or a combination of the circular hollow section and the circular solid section, preferably, the prefabricated pier stud 2 is adopted, the part from the position higher than the specified distance of the top surface of the bearing platform 1 to the bottom end of the bearing platform is the circular solid section, and the rest part is the circular hollow section. Specifically, the specified distance is 100cm to 150cm, that is, the insertion section 21 of the prefabricated pier stud 2 and the part of the prefabricated pier stud 2 at the specified distance from the top surface of the bearing platform 1 are solid sections of the prefabricated pier stud 2. The prefabricated pier stud 2 with the partial circular hollow section has less concrete consumption than the prefabricated pier stud 2 with the whole solid section, and the cost is saved. When the prefabricated pier stud 2 is combined by adopting a circular hollow section and a circular solid section, the included angle between two adjacent force bearing reinforcing nails 4 in each second annular groove and the connecting line of the circle centers of the cross sections of the prefabricated pier studs 2 is 15 degrees. The first template 11 and the second template 23 are both corrugated steel cylinders. Preferably, the surface of the corrugated steel cylinder is roughened. After the bearing platform 1 and the prefabricated pier stud 2 are molded, the corrugated steel cylinder is not detached.
Please refer to fig. 4 to fig. 6 in combination, fig. 4 is a side view of the load reinforcement nail in the prefabricated pier stud of assembled bridge and bearing platform socket joint structure of the present invention, fig. 5 is a top view of the load reinforcement nail in the prefabricated pier stud of assembled bridge and bearing platform socket joint structure of the present invention, fig. 6 is a B-B cross-sectional view of the load reinforcement nail in the prefabricated pier stud of assembled bridge and bearing platform socket joint structure of the present invention. The bearing reinforcing nail 4 comprises a vertical end plate 41, a transverse horizontal plate 42 and a vertical supporting plate 43, wherein the transverse horizontal plate 42 and the vertical supporting plate 43 are both vertically fixed on the vertical end plate 41, the vertical supporting plate 43 is positioned below the transverse horizontal plate 42, and the upper end of the vertical supporting plate 43 is vertically and fixedly connected with the middle part of the transverse horizontal plate 42. Preferably, the lower end of the vertical end plate 41 is bent in a direction approaching the insertion section 21. This setting is lifted by crane at prefabricated pier stud 2 and is inserted the in-process of socket and play the effect of conveniently aiming at and making prefabricated pier stud 2 descend smoothly. Preferably, the horizontal plate 42 is provided with a plurality of ventilation holes 421. This setting can be when filling self-compaction mortar 5 toward the bell and spigot hole, ensures that the air bubble under the bearing reinforcing nail 4 can fully escape, guarantees the filling quality of the self-compaction mortar 5 that prefabricated pier stud 2 is connected with cushion cap 1.
The following description discloses a construction method of the socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap of the utility model:
(1) Prefabricated pier column 2 prefabricated and formed in factory
When prefabricating the prefabricated pier stud 2, its vertical main muscle 22 is in stretching out the bottom of inserting section 21 back to interior vertical bending become horizontal section, many vertical main muscle 22's horizontal section ligatures are linked together, the part can weld together with the pre-buried steel sheet 24 that sets up in prefabricated pier stud 2 bottom, the corrugated steel section of thick bamboo that the surface was made rough treatment is taken as the template of this section to the inserting section 21 of prefabricated pier stud 2, the corrugated steel section of thick bamboo is with prefabricated pier stud 2's hoop muscle, vertical main muscle welded fastening to evenly weld load reinforcing nail 4 in every recess department of corrugated steel section of thick bamboo. When pouring forming is conducted, concrete is filled in the portion, between the position, higher than the specified distance of the top surface of the bearing platform 1, of the prefabricated pier stud 2 and the bottom end of the prefabricated pier stud to form a circular solid section, the remaining portion of the prefabricated pier stud is a circular hollow section, and after the prefabricated pier stud 2 is formed, the corrugated steel cylinder is not detached. The prefabricated pier column 2 is manufactured by a centrifugal method, so that the strength grade of concrete is more than or equal to C70, the consumption of concrete is saved, and the compactness and the shear-resistant bearing capacity of pier column concrete are improved.
(2) Cast-in-place construction of concrete bearing platform 1
The side wall of the bearing hole on the bearing platform 1 adopts a corrugated steel cylinder with a rough surface as a template, one end of a top layer steel bar 12 on the top layer of the bearing platform 1 is bent downwards to form a U-shaped part and is bound and connected with a bottom layer steel bar 13 in the bearing platform 1, and the bottom of the U-shaped part is tightly attached to the inner side of the corrugated steel cylinder and welded and fixed. After the bearing platform 1 is poured and formed, the corrugated steel cylinder is not detached. And after the construction of the bearing platform 1 is completed, chiseling the bottom of the bearing hole, and cleaning concrete slag and sundries at the bottom of the bearing hole.
(3) Prefabricated pier stud 2 lifts by crane and assembles and fix a position with cushion cap 1
An adjusting cushion block 3 is arranged at the center of the bottom surface of the socket hole of the bearing platform 1, and the thickness of the adjusting cushion block 3 is adjusted according to the elevation retest data at the center of the bottom surface of the socket hole of the bearing platform 1 and the actual measurement length of the prefabricated pier stud 2. And then, carrying out water spraying and wetting treatment on the joint surface of the prefabricated pier stud 2 and the bearing platform 1. The prefabricated pier stud 2 is hoisted to the position above the socket hole of the bearing platform 1, the alignment and limiting effects of the bearing reinforcing nail 4 are utilized, the prefabricated pier stud 2 is slowly and smoothly placed in the socket hole until the bottom surface of the prefabricated pier stud 2 contacts the adjusting cushion block 3, and a plurality of wood wedges are lightly driven into the space between the top surface of the bearing hole and the bearing reinforcing nail 4. The plane position and the verticality deviation of the prefabricated pier stud 2 are accurately adjusted by adjusting the driving depth of the corresponding wood wedge, and the driving depth of the wood wedge is fixed after the final plane position and the verticality of the pier stud meet the requirements.
(4) The gap between the prefabricated pier stud 2 and the socket hole of the bearing platform 1 is filled with self-compacting mortar 5
Pouring self-compaction mortar 5 into the clearance between the insertion section 21 of prefabricated pier stud 2 and the socket hole, because the effect of adjusting cushion 3, be intercommunication each other between the space of the lateral wall of socket hole and the space of its bottom surface, self-compaction mortar 5 is full of the space between prefabricated pier stud 2 bottom and the socket hole bottom surface earlier, then self-compaction mortar 5 is along the jacking of the space of socket hole lateral wall, all spaces between the pore wall of socket hole and prefabricated pier stud 2 are full of self-compaction mortar 5 and spill over from cushion cap 1 top surface, the grout reaches closely knit full. And stopping grouting after the self-compacting mortar 5 is filled in all the gaps and overflows from the top surface of the bearing platform 1, leveling and plastering the self-compacting mortar 5 overflowing from the top surface of the bearing platform 1, then covering and maintaining, and connecting the prefabricated pier stud 2 and the bearing platform 1 into a whole after the self-compacting mortar 5 is hardened. The self-compacting mortar 5 is self-compacting ultrahigh-performance mortar and mainly prepared from cement, superfine active powder, fine aggregate, high-modulus fiber and a polycarboxylic acid high-efficiency water reducing agent, and has the characteristics of high strength, excellent working performance, high fluidity, good volume stability, no need of external vibration, capability of flowing under the action of self gravity, capability of filling compact gaps and the like, the compressive strength is not less than 120MPa, and the tensile strength is generally not less than 5 MPa.
(5) Position adjusting device for dismantling pier stud
After the self-compacting mortar 5 is hardened, the prefabricated pier stud 2 and the bearing platform 1 are connected into a whole, the driven wood wedge is taken out, the same self-compacting mortar 5 is filled in a gap at the position of the wood wedge, and then the next step of prefabricated bent cap installation can be carried out.
Compared with the prior art, the beneficial effects of the utility model are that: the structure is simple, the requirements of the assembled pier structure on bearing capacity and connection strength can be met, the longitudinal main rib 22 of the prefabricated pier stud 2 extends out of the bottom end of the insertion section 21 and then is bent inwards and vertically to form a transverse section, a plurality of transverse sections are bound and connected together, the anchoring length of the steel bar in socket joint connection of the prefabricated pier stud 2 is increased, meanwhile, a first annular groove is arranged on the inner side wall of the socket hole, a second annular groove and a plurality of force bearing reinforcing nails 4 fixed in the second annular groove are arranged on the outer side wall of the insertion section 21, an adjusting cushion block 3 is arranged between the bottom surface of the socket hole and the bottom end of the prefabricated pier stud 2 and is communicated with the hole between the socket hole and the insertion section 21, self-compacting mortar 5 can be filled between the inner side wall of the socket hole and the insertion section and between the bottom surface of the socket hole and the bottom end of the insertion section, the integrity and the safety of the socket connection of the prefabricated, the overall stress performance and the anti-seismic performance of the connecting part of the prefabricated pier stud 2 and the bearing platform 1 are improved, and the minimum socket depth of the prefabricated pier stud 2 is reduced, namely the embedding depth of the prefabricated pier stud is reduced, and the thickness of the bottom plate of the bearing platform 1 can be correspondingly reduced, so that the overall thickness of the bearing platform 1 is reduced, the concrete consumption can be greatly saved, and the construction cost is reduced; the longitudinal main reinforcements 22 of the prefabricated pier stud 2 do not extend outwards, and a large number of vertical connecting reinforcements or embedded parts such as prestressed ducts, reinforcement connecting sleeves, metal corrugated pipes and the like do not need to be embedded, so that the processing and mounting requirements on the prefabricated template of the prefabricated pier stud 2 are reduced, and the turning, transportation and hoisting of the prefabricated pier stud 2 are easier; the prefabricated pier stud 2 and the bearing platform 1 are not connected through steel bars, no steel bar welding connection work is performed during field assembly, the field operation amount is small, the hoisting operation can be rapidly completed, the influence on the construction field environment is reduced, and the construction cost is reduced; the prefabricated pier stud 2 can be inserted into the bearing hole of the bearing platform 1 without the butt joint of highly accurate hole sites during the assembly connection construction, the assembly construction is simple, convenient and quick, the construction process and the construction operation are simple, large construction deviation can be allowed for the socket hole of the bearing platform 1, the requirement on the accuracy of the section size of the prefabricated pier stud is low, and the adjustable allowance is large.
The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.
Claims (10)
1. A socket joint connecting structure of a prefabricated pier column and a bearing platform of an assembled bridge is characterized by comprising the bearing platform, the prefabricated pier column and an adjusting cushion block, wherein a bearing insertion hole is formed in the bearing platform;
A first template is arranged on the inner side wall of the socket hole, a first annular bulge and a first annular groove are formed on the inner surface and the outer surface of the first template, and the first annular bulge and the first annular groove are sequentially arranged to form a corrugated shape;
The lower section of the prefabricated pier stud is an insertion section inserted into the insertion hole, a longitudinal main rib of the prefabricated pier stud extends out of the bottom end of the insertion section and then is vertically bent inwards to form a transverse section, and a plurality of transverse sections are bound and connected together;
The outer side wall of the insertion section is provided with a second template, the inner surface and the outer surface of the second template are both provided with a second annular bulge and a second annular groove, and the second annular bulge and the second annular groove are sequentially arranged to form a corrugated shape;
The second template is fixedly connected with the longitudinal main rib of the prefabricated pier stud, and a plurality of uniformly distributed bearing reinforcing nails are arranged in each second annular groove on the outer surface of the second template;
The adjusting cushion block is arranged between the bottom end of the insertion section and the bottom surface of the bearing hole;
Self-compacting mortar is poured between the bottom end of the insertion section and the bottom surface of the bearing hole and between the outer side wall of the insertion section and the inner side wall of the bearing hole.
2. The socket joint structure of the prefabricated pier stud of assembled bridge and the bearing platform as claimed in claim 1, wherein the force-bearing reinforcing nails comprise a vertical end plate, a horizontal plate and a vertical support plate, the horizontal plate and the vertical support plate are both vertically fixed on the vertical end plate, the vertical support plate is located below the horizontal plate, and the upper end of the vertical support plate is vertically fixed with the middle part of the horizontal plate.
3. The socket joint construction of an assembled bridge precast pier stud and a cap according to claim 2, wherein the lower end of the vertical end plate is bent in a direction approaching the insertion section.
4. The socket joint structure of the prefabricated pier stud and the bearing platform of the fabricated bridge according to claim 2, wherein the horizontal plate is provided with a plurality of air vents.
5. The socket joint structure of the prefabricated pier stud of the fabricated bridge and the bearing platform as claimed in claim 1, wherein a pre-buried steel plate is provided at a position of the bottom end of the insertion section corresponding to the adjusting pad.
6. The socket joint construction of an assembled bridge prefabricated pier and a bearing platform according to claim 1, wherein the cross section of a portion of the prefabricated pier between a position higher than the top surface of the bearing platform by a designated distance and the bottom end thereof is a circular solid section, and the cross section of the remaining portion thereof is a circular hollow section.
7. The socket joint structure of prefabricated pier stud and bearing platform of assembled bridge according to claim 6, wherein the angle between two adjacent force-bearing reinforcing nails in each second annular groove and the line connecting the centers of circles of the cross sections of the prefabricated pier studs is 15 degrees.
8. The socket joint construction of the prefabricated pier stud of assembled bridge and the bearing platform according to claim 6, wherein the first formwork and the second formwork are corrugated steel cylinders.
9. The socket joint construction of an assembled bridge precast pier and a cap according to claim 8, wherein the surface of the corrugated steel cylinder is roughened to form a roughened layer.
10. The socket joint structure of the prefabricated pier stud of the assembled bridge and the bearing platform as claimed in claim 1, wherein one end of the top steel bar in the bearing platform is bent downwards to form a U-shaped portion and is bound and connected with the bottom steel bar in the bearing platform, and the bottom of the U-shaped portion is welded and fixed with the first formwork.
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| CN201921218144.9U CN211036679U (en) | 2019-07-30 | 2019-07-30 | Socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap |
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| CN201921218144.9U CN211036679U (en) | 2019-07-30 | 2019-07-30 | Socket joint connection structure of prefabricated pier stud of assembled bridge and cushion cap |
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| CN211036679U true CN211036679U (en) | 2020-07-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030723A (en) * | 2020-07-31 | 2020-12-04 | 中南大学 | Bridge pier column and pier column joint structure thereof |
| CN112176886A (en) * | 2020-11-16 | 2021-01-05 | 山东高速建设管理集团有限公司 | Double-steel sleeve socket connection structure of prefabricated bridge pier and construction method thereof |
| CN113481827A (en) * | 2021-07-23 | 2021-10-08 | 中铁上海工程局集团有限公司 | Assembled bridge connection structure |
| CN114592423A (en) * | 2022-04-01 | 2022-06-07 | 中国十九冶集团有限公司 | Wet joint connection construction method of prefabricated pier stud and bearing platform |
| CN114635349A (en) * | 2021-12-06 | 2022-06-17 | 中交第二公路勘察设计研究院有限公司 | Light-duty assembled pier suitable for non-violent earthquake district |
| CN114908661A (en) * | 2022-05-17 | 2022-08-16 | 华设设计集团股份有限公司 | Rubber energy-consuming self-resetting socket-and-spigot type pier connection structure and assembling method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112030723A (en) * | 2020-07-31 | 2020-12-04 | 中南大学 | Bridge pier column and pier column joint structure thereof |
| CN112176886A (en) * | 2020-11-16 | 2021-01-05 | 山东高速建设管理集团有限公司 | Double-steel sleeve socket connection structure of prefabricated bridge pier and construction method thereof |
| CN112176886B (en) * | 2020-11-16 | 2022-03-22 | 山东高速建设管理集团有限公司 | Double-steel sleeve socket connection structure of prefabricated bridge pier and construction method thereof |
| CN113481827A (en) * | 2021-07-23 | 2021-10-08 | 中铁上海工程局集团有限公司 | Assembled bridge connection structure |
| CN113481827B (en) * | 2021-07-23 | 2022-09-27 | 中铁上海工程局集团有限公司 | Assembled bridge connection structure |
| CN114635349A (en) * | 2021-12-06 | 2022-06-17 | 中交第二公路勘察设计研究院有限公司 | Light-duty assembled pier suitable for non-violent earthquake district |
| CN114592423A (en) * | 2022-04-01 | 2022-06-07 | 中国十九冶集团有限公司 | Wet joint connection construction method of prefabricated pier stud and bearing platform |
| CN114592423B (en) * | 2022-04-01 | 2024-01-30 | 中国十九冶集团有限公司 | Wet joint connection construction method for prefabricated pier column and bearing platform |
| CN114908661A (en) * | 2022-05-17 | 2022-08-16 | 华设设计集团股份有限公司 | Rubber energy-consuming self-resetting socket-and-spigot type pier connection structure and assembling method thereof |
| CN114908661B (en) * | 2022-05-17 | 2023-07-21 | 华设设计集团股份有限公司 | Rubber energy consumption self-resetting socket pier connection structure and assembly method thereof |
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