CN113322795A - Double-column type prefabricated assembled pier and construction method - Google Patents

Abstract

The application discloses pier is assembled in prefabrication of double-column type, pier is assembled in prefabrication of double-column type includes prefabricated pier stud and tie beam. The prefabricated pier columns are provided with embedded ribs at least partially exposed, the two prefabricated pier columns are oppositely arranged, a post-cast strip is reserved between the two prefabricated pier columns, and the exposed ends of the embedded ribs of the two prefabricated pier columns are lapped on the post-cast strip; and the tie beam is poured on the post-pouring belt so as to connect the two prefabricated pier studs in an assembling way. The application provides a pier is assembled in prefabrication of double column type has easy operation, the advantage of being convenient for construction.

Description

Double-column type prefabricated assembled pier and construction method

Technical Field

The application relates to the field of bridge engineering, in particular to a double-column type prefabricated assembled pier and a construction method.

Background

Conventional prefabricated assembly pier adopts single-column pier more, except the concatenation of pier bottom and cushion cap, often is limited to component transportation and hoist and mount weight, needs to carry out the secondary and connects long to pier further merogenesis in the direction of height, connects long forms and adopts forms such as grout sleeve, grout corrugated metal pipe connection or prestressing tendons to connect more. The grouting sleeve and the grouting metal corrugated pipe are connected in the construction process, high-precision splicing is strictly needed, construction control is strictly, operation is complex, and particularly the construction difficulty and risk of aerial extension are large; the prestressed tendon connection needs to embed a prestressed tendon pipeline in a precast segment of a pier in advance, and stretch the prestressed tendon operation, and the prestressed tendon effect directly influences the connection reliability and the structural integrity of components. The concrete joint section has poor mechanical continuity and structural ductility due to the difference of the two materials. The problems of complex operation and high construction difficulty of the prefabricated assembled pier in the prior art exist.

Disclosure of Invention

In view of this, the embodiment of the application expects to provide a pier is assembled in prefabricating of double column type to solve the problem that prefabrication assembly pier installation operation is complicated, the construction degree of difficulty is big.

In order to reach above-mentioned purpose, this application embodiment provides a pier is assembled in prefabricated of double column type, includes:

the prefabricated pier columns are provided with embedded ribs at least partially exposed, the two prefabricated pier columns are oppositely arranged, a post-cast strip is reserved between the two prefabricated pier columns, and the exposed ends of the embedded ribs of the two prefabricated pier columns are lapped on the post-cast strip; and

and the tie beam is poured on the post-cast strip so as to connect the two prefabricated pier studs in an assembling way.

Furthermore, the corresponding embedded ribs on the two prefabricated pier columns are welded or bound and connected.

Furthermore, the exposed ends of the embedded ribs are closed rings, the embedded ribs are arranged in layers along the height direction of the prefabricated pier stud, and the tie beams are made of common concrete and poured in the post-cast strip.

Further, the width of the post-cast strip between the two prefabricated pier studs is 40-60 cm.

Furthermore, the embedded ribs are distributed at two horizontal ends of the post-cast strip, the embedded ribs are arranged in a layered mode along the height direction of the prefabricated pier stud, and the tie beam is made of ultra-high performance concrete and poured in the post-cast strip.

Further, the width of the post-cast strip between the two prefabricated pier studs is 10-30 cm.

Further, the post-cast strip is positioned in the middle of the two prefabricated pier studs.

Furthermore, a boss is formed on the prefabricated pier stud, the embedded rib is exposed out of the boss, and the post-cast strip is reserved between the two bosses.

Further, flanges are formed at the horizontal two ends of the adjacent sides of the two bosses or the bottom ends of the adjacent sides of the two bosses; and the corresponding flanges of the two bosses are butted to form a template, and at least part of the template surrounds the post-pouring strip.

Further, flanges are formed at the horizontal two ends of the adjacent sides of the two bosses and the bottom ends of the adjacent sides of the two bosses; and the corresponding flanges of the two bosses are butted to form a template, and at least part of the template surrounds the post-pouring strip.

Further, pier is assembled in prefabricated of double column formula still includes:

and one end of the supporting inclined rod is connected to the flange at the bottom end of the boss, and the other end of the supporting inclined rod is connected to the prefabricated pier below the boss.

Further, the prefabricated pier stud is of a hollow structure.

The pier is assembled in prefabricating of double column formula that this application embodiment provided, including prefabricated pier stud and straining beam. The two prefabricated pier columns are oppositely arranged, a post-cast strip is reserved between the two prefabricated pier columns, and the tie beam is poured in the post-cast strip so that the two prefabricated pier columns are assembled and connected. The prefabricated pier stud that adopts two relative settings makes two prefabricated pier studs assemble the connection through the cast-in-place tie beam, has alleviateed the weight of single pier, need not install the pier merogenesis in the direction of height because the single-column pier is overweight, has easy operation, the advantage of the construction of being convenient for.

Drawings

Fig. 1 is a schematic structural view of a double-column type prefabricated assembled pier in the embodiment of the application;

fig. 2 is a schematic elevation reinforcement diagram of a double-column type precast assembled pier formed by pouring common concrete on a tie beam in the embodiment of the application;

fig. 3 is a schematic plane reinforcement arrangement diagram of a double-column precast assembled pier formed by pouring common concrete on a tie beam in the embodiment of the application;

fig. 4 is a schematic elevation reinforcement arrangement diagram of a double-column prefabricated assembled pier formed by pouring UHPC through a tie beam in the embodiment of the application; and

fig. 5 is a schematic plane reinforcement arrangement diagram of a double-column prefabricated assembled pier formed by pouring UHPC through tie beams in the embodiment of the application.

Description of the reference numerals

1. Double-column type prefabricated assembled piers; 2. prefabricating a pier stud; 3. tying a beam; 4. pre-embedding ribs; 5. post-pouring a belt; 6. a boss; 7. a flange; 8. a bearing platform.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

The directional terms used in the description of the present application are intended only to facilitate the description of the application and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered limiting of the application.

In the prior art, the prefabricated pier mostly adopts a single-column pier, except for splicing the pier bottom and a bearing platform, the prefabricated pier is usually limited to component transportation and hoisting weight, the pier needs to be further segmented in the height direction, secondary lengthening needs to be carried out, and the lengthening form mostly adopts forms such as grouting sleeves, grouting metal corrugated pipe connection or prestressed rib connection. The grouting sleeve and the grouting metal corrugated pipe are connected in the construction process, high-precision splicing is strictly needed, construction control is strictly, operation is complex, and particularly the construction difficulty and risk of aerial extension are large; the prestressed tendon connection needs to embed a prestressed tendon pipeline in a precast segment of a pier in advance, and stretch the prestressed tendon operation, and the prestressed tendon effect directly influences the connection reliability and the structural integrity of components. In the prior art, the bridge pier is prefabricated and assembled, so that the operation is complex and the construction difficulty is high; the grouting technology has high requirements, and the potential hazards of incomplete grouting or incompact grouting exist, so that the safety performance of the joint is influenced; the concrete joint section has poor mechanical continuity and structural ductility due to the difference of the two materials.

The pier is assembled in prefabricating of double column formula that this application embodiment provided, it shows with reference to fig. 1 ~ 5, including prefabricated pier stud 2 and tie beam 3. The prefabricated pier stud 2 is provided with embedded ribs 4 at least partially exposed, the two prefabricated pier studs 2 are oppositely arranged, a post-cast strip 5 is reserved between the two prefabricated pier studs 2, and the exposed ends of the embedded ribs 4 of the two prefabricated pier studs 2 are lapped on the post-cast strip 5; the tie beam 3 is poured on the post-cast strip 5, so that the two prefabricated pier studs 2 are spliced and connected. Adopt two prefabricated pier stud 2 that set up relatively, make two prefabricated pier stud 2 assemble the connection through tie beam 3, alleviateed the weight of pier stud, need not install the pier merogenesis because the one-column pier is overweight and in the direction of height, have easy operation, the advantage of the construction of being convenient for.

The pier is assembled in prefabricating of double-column type of this application embodiment, it is shown with reference to fig. 1, prefabricated pier stud 2 is a whole in the direction of height, falls into two prefabricated pier studs 2 that set up relatively with the pier stud, makes two prefabricated pier studs 2 assemble the connection through straining beam 3, does not need to splice the assembly again in the direction of height segmentation prefabrication, need not carry out the secondary and prolongs, has solved and need strictly carry out the high accuracy in the work progress and to piecing together, especially aerial to connect the problem that the construction degree of difficulty, risk are big. Because prefabricated pier stud 2 is a whole in the direction of height, so the reliability and the structural integrity of the pier 1 are assembled in the prefabricated double-column type of this application embodiment are higher.

In one embodiment, the corresponding embedded ribs 4 on the two prefabricated pier columns 2 are welded or bound. The embedded ribs 4 are connected continuously through welding or binding, the strength of the tie beam 3 after pouring is guaranteed, and the integrity of the pier structure is improved.

In one embodiment, referring to fig. 2 to 5, the exposed ends of the corresponding embedded ribs 4 on the two prefabricated pier studs 2 are lapped on the post-cast strip 5, and the tie beam 3 is poured on the post-cast strip 5 to connect the two prefabricated pier studs 2 in an assembling manner. The direct overlap joint of the end that exposes of pre-buried muscle 4 need not erect the support again and additionally be under construction to pre-buried muscle 4, can guarantee structural strength, can reduce the construction degree of difficulty again, reduces work load, improves work efficiency.

In an embodiment, referring to fig. 2 to 3, the exposed ends of the embedded ribs 4 are closed rings, the embedded ribs 4 are arranged in layers along the height direction of the prefabricated pier stud 2, and the tie beam 3 is made of common concrete and poured on the post-cast strip 5. The exposed end of the embedded rib 4 is a closed ring, so that the reinforcing strength of the embedded rib 4 can be improved, and the strength of the tie beam 3 can be improved. Adopt ordinary concrete placement to form tie beam 3, strengthen tie beam 3 through closed annular pre-buried muscle 4 to make two prefabricated pier stud 2 assemble the connection. The embedded ribs 4 are arranged in a layered mode along the height direction of the prefabricated pier stud 2, the structural strength of the tie beam 3 is guaranteed through common reinforcement of the multiple layers of embedded ribs 4, and then the structural strength and structural integrity of the pier are guaranteed.

In an embodiment, referring to fig. 2 to 3, the exposed ends of the embedded ribs 4 are closed rings, the embedded ribs 4 are arranged in layers along the height direction of the prefabricated pier stud 2, and when the tie beam 3 is made of common concrete and poured on the post-cast strip 5, the width of the post-cast strip 5 along the space between the two prefabricated pier studs 2 is 40 to 60 cm. The exposed ends of the embedded ribs 4 are closed rings to provide enough strength for the tie beam 3, the width of the post-cast strip 5 between the two prefabricated pier studs 2 is 40-60 cm, such as 40cm, 45cm, 50cm, 55cm and 60cm, and the tie beam 3 is formed by pouring common concrete in the post-cast strip 5.

In an embodiment, referring to fig. 4 to 5, the embedded ribs 4 are distributed at two horizontal ends of the post-cast strip 5, the embedded ribs 4 are arranged in layers along the height direction of the prefabricated pier stud 2, and the tie beam 3 is made of ultra-high performance concrete and is poured on the post-cast strip 5. The Ultra-High Performance Concrete is UHPC (Ultra-High Performance Concrete), and the Ultra-High Performance Concrete is special Concrete with Ultra-High strength, Ultra-low water absorption, Ultra-High durability and erosion resistance. When the tie beam 3 is made of ultrahigh-performance concrete and poured on the post-cast strip 5, the embedded ribs 4 are distributed at two horizontal ends of the post-cast strip 5, and the tie beam 3 is reinforced through the embedded ribs 4, so that the two prefabricated pier studs 2 are assembled and connected. The number of the embedded ribs 4 in the horizontal direction is determined according to the strength requirement, and the embedded ribs 4 can be arranged at two horizontal ends or arranged in rows in the horizontal direction.

In an embodiment, referring to fig. 4 to 5, the embedded ribs 4 are distributed at two horizontal ends of the post-cast strip 5, the embedded ribs 4 are arranged in layers along the height direction of the prefabricated pier stud 2, and when the tie beam 3 is made of ultra-high performance concrete and is poured on the post-cast strip 5, the width of the post-cast strip 5 between the two prefabricated pier studs 2 is 10 to 30 cm. The ultra-high performance concrete is special concrete with ultra-high strength, ultra-low water absorption, ultra-high durability and erosion resistance. The embedded ribs 4 are distributed at two horizontal ends of the post-cast strip 5 to provide enough strength for the tie beam 3, the width of the post-cast strip 5 between the two prefabricated pier studs 2 is 10-30 cm, for example, 10cm, 15cm, 20cm, 25cm and 30cm, and the ultra-high performance concrete is poured on the post-cast strip 5 to form the tie beam 3.

In one embodiment, referring to fig. 1, the post-cast strip 5 is located in the middle of the prefabricated pillars 2. The cast-in-place concrete forms the post-cast strip 5 in the middle of the two prefabricated pier studs 2, the weak position of the structure is avoided, the connection performance is better, and the strength and the ductility of the structure are improved. The cast-in-place concrete is an inorganic non-metallic material, and has good structural durability and ductility. The height of the tie beam 3 is typically 100 cm.

In an embodiment, referring to fig. 1, 2 and 4, a boss 6 is formed on the prefabricated pier stud 2, the embedded rib 4 is exposed out of the boss 6, and a post-cast strip 5 is reserved between the two bosses 6. The interval of two prefabricated pier stud 2 is regularly, sets up boss 6 on two prefabricated pier stud 2, reserves post-cast strip 5 between the boss 6, and when tie beam 3 was pour in post-cast strip 5, construction degree of difficulty and work load when having reduced later stage prefabricated pier stud 2 and assembling the connection have been reduced. The width of the prefabricated boss 6 can be as wide as the prefabricated pier stud 2 when the prefabricated pier stud 2 is prefabricated, and can also be narrower than the prefabricated pier stud 2. Preferably, the boss 6 is as wide as the prefabricated pier stud 2, and the structural strength and the structural integrity of the prefabricated assembled pier are guaranteed.

In one embodiment, referring to fig. 2 to 4, the horizontal two ends of the adjacent sides of the two bosses 6 or the bottom ends of the adjacent sides of the two bosses 6 are formed with flanges 7; the corresponding flanges 7 of the two bosses 6 are butted to form a template at least partially enclosing the post-cast strip 5. Flanges 7 are respectively formed at the horizontal two ends of the adjacent sides of the two bosses 6, and when the tie beam 3 is poured on the post-cast strip 5, templates do not need to be erected at the horizontal two ends due to the fact that the flanges 7 are arranged at the horizontal two ends. Only need erect the template or directly hoist and mount a template in 5 tops of post-cast strip in flange 7 bottoms, reduced the construction degree of difficulty and the work load when prefabricated pier stud 2 in later stage is assembled and is connected, saved the expense of template, reduce cost. The thickness of the flange is 5 to 10cm, for example, 5cm, 6cm, 7cm, 8cm, 9cm and 10 cm. It will be appreciated that flanges 7 may be formed at the bottom ends of the adjacent sides of the bosses 6, and when the tie beam 3 is cast in the post-cast strip 5, there is no need to erect formworks at the bottom ends due to the flanges 7 at the bottom ends. Only need erect the template at 7 horizontal both ends of flange, reduced the construction degree of difficulty and the work load when prefabricated pier stud 2 in later stage is assembled and is connected, saved the expense of template, reduce cost. The corresponding flanges of the two bosses are separated by a preset distance, the preset distance is determined according to construction precision and is generally 0-50 mm, such as 0mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm and 50 mm. When the construction precision is relatively accurate, the preset distance can be correspondingly smaller, so that the flanges 7 can be conveniently plugged at the interval preset distance when the tie beam 3 is poured on the post-cast strip 5, and slurry leakage is prevented. When the construction precision is not very accurate, predetermine the distance and corresponding a little more, prevent when prefabricated pier stud 2 assembles the connection, the condition that flange 7 took place to interfere on two prefabricated pier studs 2. Preferably, the preset distance of the two flanges 7 at the two sides is 10mm, so that the preset distance of the flanges 7 at the two sides is conveniently plugged when the tie beam 3 is poured in the post-cast strip 5, and the condition that the flanges 7 on the two prefabricated pier studs 2 interfere with each other can be prevented.

In one embodiment, as shown in fig. 2 to 5, the horizontal ends of the adjacent sides of the two bosses 6 and the bottom ends of the adjacent sides of the two bosses 6 are formed with flanges 7; the corresponding flanges 7 of the two bosses 6 are butted to form a post-cast strip at least partially enclosing the formwork. The horizontal both ends and the bottom of the adjacent side of two bosss 6 all are formed with flange 7, when pouring the tie beam 3 in post-cast strip 5, because there is flange 7 adjacent side of two bosss 6, need not erect the template, construction degree of difficulty and work load when having reduced prefabricated pier stud 2 of later stage and assembling the connection have saved the expense of template, reduce cost. The flanges 7 on both sides are spaced apart by a predetermined distance, which is determined according to construction accuracy, and is generally 0 to 50mm, for example, 0mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, and 50 mm. When the construction precision is relatively accurate, the preset distance can be correspondingly smaller, so that the flanges 7 can be conveniently plugged at the interval preset distance when the tie beam 3 is poured on the post-cast strip 5, and slurry leakage is prevented. When the construction precision is not very accurate, predetermine the distance and corresponding a little more, prevent when prefabricated pier stud 2 assembles the connection, the condition that flange 7 took place to interfere on two prefabricated pier studs 2. Preferably, the preset distance of the two flanges 7 at the two sides is 10mm, so that the preset distance of the flanges 7 at the two sides is conveniently plugged when the tie beam 3 is poured in the post-cast strip 5, and the condition that the flanges 7 on the two prefabricated pier studs 2 interfere with each other can be prevented.

In an embodiment, the double-column precast pier 1 further includes a support diagonal bar (not shown). One end of the supporting diagonal rod is fixed on the flange 7 at the bottom end of the boss 6, and the other end of the supporting diagonal rod is fixed on the prefabricated pier stud 2 below the boss 6. The one end of supporting the down tube is fixed on the flange 7 of the bottom of boss 6, and the other end is fixed and is made up the formation triangle brace structure on prefabricated pier stud 2 of boss 6 below, and the triangle brace structure is the main stress structure of post-cast strip 5, forms post-cast strip 5 that has enough bearing capacity, ensures the structural strength of tie beam 3, and then has ensured the structural strength and the structural integrity of pier.

The support diagonal rod can be a steel structure support diagonal rod, has enough strength, ensures the structural strength of tie beam 3, and when pouring tie beam 3, steel structure support diagonal rod one end is fixed on flange 7 of the bottom of boss 6, and the other end is fixed on prefabricated pier stud 2 below boss 6. After the tie beam 3 is formed, the steel structure support diagonal can be taken down for recycling. The support diagonal rod can also be of a reinforced concrete structure and is prefabricated with the prefabricated pier stud 2, the boss 6 and the flange 7, and the structural strength and the structural integrity of the pier are ensured due to the fact that the support diagonal rod is prefabricated and molded together.

In one embodiment, prefabricated pier 2 is a hollow structure. Adopt two prefabricated pier stud 2 that set up relatively, make two prefabricated pier stud 2 assemble the connection through tie beam 3, prefabricated pier stud 2 is hollow structure, further reduces the weight of single prefabricated pier stud 2, reduces the requirement to the machines during transportation, hoist and mount. The pier does not need to be installed in a sectional manner in the height direction, and the method has the advantages of simplicity in operation and convenience in construction. Through setting up prefabricated pier stud 2 into hollow structure, further lighten the weight of pier stud, reduced the construction degree of difficulty when prefabricated pier stud 2 in later stage is assembled and is connected, saved the material, reduce cost.

In an embodiment, referring to fig. 1, the connection between the pier stud and the abutment 8 of the double-column precast pier 1 may be in the form of cast-in-place concrete, a grouting sleeve, or a grouting metal corrugated pipe. After the pier stud is matched with the bearing platform 8 in place, pouring construction between the pier stud and the bearing platform 8 can be performed synchronously with pouring construction of the tie beam 3 of the post-cast strip 5, and the construction period is shortened. The pier column and the bearing platform 8 are poured by conventional concrete materials, so that the construction cost is low and the economical efficiency is good.

In one embodiment, the prefabricated pier stud 2 is prefabricated in a factory or on site, and the prefabricated pier stud 2 is stored for 2-3 months. And (3) transporting the prefabricated pier stud 2 to a bridge site for hoisting, matching the bottom of the pier stud with the bearing platform 8 in place, aligning and matching the post-cast strip 5, installing a tie beam 3 template, pouring common concrete or ultrahigh-performance concrete in the post-cast strip 5, removing the template after the concrete is cured, and performing construction of the next double-column prefabricated assembled pier 1, wherein the steps are repeated.

It can be understood that when the horizontal two ends and the bottom end of the adjacent sides of the two bosses 6 on the pier stud are both provided with the flanges 7, the prefabricated pier stud 2 is transported to a bridge site for hoisting, so that the bottom of the pier stud is matched with the bearing platform 8 in place, the flanges 7 of the adjacent sides of the two bosses 6 are aligned and matched, then the gap between the flanges 7 on the two bosses 6 is sealed, the tie beam 3 template is not required to be erected, the common concrete or the ultra-high performance concrete is poured into the flanges 7 to form the tie beam 3, the subsequent step of dismantling the tie beam 3 template is not required, the construction difficulty and the workload when the prefabricated pier stud 2 is assembled and connected in the later period are reduced, the cost of the template is saved, and the cost is reduced. According to the requirement of the on-site construction period, the pouring of the tie beam 3 can be synchronously implemented with the pouring of the pier stud and the bearing platform 8, so that the construction period is shortened.

The various embodiments/implementations provided herein may be combined with each other without contradiction.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a pier is assembled in prefabricated of double column type which characterized in that includes:

the prefabricated pier columns are provided with embedded ribs at least partially exposed, the two prefabricated pier columns are oppositely arranged, a post-cast strip is reserved between the two prefabricated pier columns, and the exposed ends of the embedded ribs of the two prefabricated pier columns are lapped on the post-cast strip; and

and the tie beam is poured on the post-cast strip so as to connect the two prefabricated pier studs in an assembling way.

2. The double-column type prefabricated assembled pier of claim 1, wherein the corresponding embedded ribs on the two prefabricated piers are welded or bound and connected.

3. The double-column type prefabricated assembled pier of claim 1, wherein the exposed ends of the embedded ribs are closed rings, the embedded ribs are arranged in layers along the height direction of the prefabricated pier column, and the tie beams are made of common concrete and poured on the post-cast strip.

4. The double-column type prefabricated assembled pier of claim 3, wherein the width of the post-cast strip between the two prefabricated piers is 40-60 cm.

5. The double-column type prefabricated assembled pier of claim 1, wherein the embedded ribs are distributed at two horizontal ends of the post-cast strip, the embedded ribs are arranged in layers along the height direction of the prefabricated pier column, and the tie beam is made of ultra-high performance concrete and poured on the post-cast strip.

6. The double-column type prefabricated assembled pier of claim 5, wherein the width of the post-cast strip along the space between the two prefabricated piers is 10-30 cm; and/or the presence of a gas in the gas,

the post-cast strip is positioned in the middle of the two prefabricated pier studs.

7. The double-column type prefabricated assembling pier according to any one of claims 1 to 6, wherein bosses are formed on the prefabricated pier columns, the embedded ribs are exposed out of the bosses, and the post-cast strip is reserved between the two bosses.

8. The double-column type prefabricated assembly pier according to claim 7, wherein flanges are formed at the horizontal two ends of the adjacent sides of the two bosses and/or the bottom ends of the adjacent sides of the two bosses; and the corresponding flanges of the two bosses are butted to form a template, and at least part of the template surrounds the post-pouring strip.

9. The pier is assembled in prefabricated of double-column of claim 8, characterized in that, pier is assembled in prefabricated of double-column still includes:

and one end of the supporting inclined rod is connected to the flange at the bottom end of the boss, and the other end of the supporting inclined rod is connected to the prefabricated pier below the boss.

10. The double-column type prefabricated assembled pier according to any one of claims 1 to 6, wherein the prefabricated pier column is of a hollow structure.

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