CN108978449B - A prefabricated assembled bridge pier with a socket structure using grouting sleeves for the joints - Google Patents

Abstract

The invention relates to the technical field of bridge construction, in particular to a socket structure prefabricated spliced pier with a joint adopting a grouting sleeve, which comprises a prefabricated bearing platform and prefabricated piers, wherein the prefabricated piers are arranged on the prefabricated bearing platform, and a plurality of the prefabricated piers are arranged in a stacked manner; the top surface of the prefabricated bearing platform and the top surface of the prefabricated pier are provided with mortises, and the bottom of the prefabricated pier is provided with tenons; still include pier grout sleeve, pier reinforcing bar and cushion cap reinforcing bar. The invention has the beneficial effects that: through the design of tenons and mortises, dangerous accidents such as overturning and the like are prevented when the prefabricated bearing platform and the prefabricated pier are spliced, and the stability of the structure in the construction process is improved; the arrangement of the pier grouting sleeve, the pier reinforcing steel bars and the bearing platform reinforcing steel bars ensures the stability of the whole structure after grouting is finished, and the horizontal shear resistance of the prefabricated spliced pier of the joint adopting the socket structure of the grouting sleeve is improved.

Description

A prefabricated assembled bridge pier with socket structure using grouting sleeves for joints

Technical field

The invention relates to the technical field of bridge construction, and in particular to a socket-type prefabricated assembled bridge pier whose joints adopt grouting sleeves.

Background technique

When the bridge structure encounters an earthquake, the bridge piers are vulnerable parts. At present, assembled bridge piers are connected with high-strength mortar or structural glue. The joints are mostly in the form of plane joints, which makes it difficult to eliminate possible shear dislocation between segments. Their integrity and seismic resistance are not as good as those of integrally cast-in-situ bridge piers. They are generally used for Areas with low earthquake risk. On the other hand, plane joints require very high construction accuracy of the splicing surface. The mechanical properties of materials between high-strength mortar or structural adhesive and precast concrete are quite different, making the durability of the joints more prominent. Moreover, the on-site splicing work of prefabricated assembled bridge piers is also more dangerous than the installation of cast-in-place bridge piers.

Contents of the invention

In order to overcome the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a prefabricated assembled bridge pier that facilitates on-site construction and improves the safety of on-site construction.

In order to solve the above technical problems, the technical solution adopted by the present invention is:

A prefabricated assembled bridge pier with a socket-type structure for joints using grouting sleeves, including a prefabricated pedestal and a prefabricated pier. The prefabricated piers are installed on the prefabricated pier, and a plurality of the prefabricated piers are installed in a stack; the prefabricated piers are The top surface of the platform and the top surface of the prefabricated pier are provided with tenon grooves, and the bottom of the prefabricated bridge pier is provided with a tenon, and the size of the tenon is adapted to the tenon groove;

The bottom surface of the prefabricated pier is provided with a pier grouting sleeve with an opening downward; pier steel bars are pre-embedded in the prefabricated pier, and one end of the pier steel bar extends into the pier grouting sleeve on the bottom surface of the prefabricated pier, and the other end Extend out the top surface of the precast pier and extend into the pier grouting sleeve of the adjacent precast pier above;

There are capping steel bars embedded in the prefabricated capping platform, and the capping reinforcing bars extend from the top surface of the prefabricated capping platform and extend into the pier grouting sleeve of the prefabricated bridge pier above;

A steel pipe is embedded in the tenon groove, the size of the tenon matches the steel pipe, and the tenon is embedded in the steel pipe.

Further, a steel sleeve is placed on the tenon, and the outer diameter of the steel sleeve is adapted to the steel pipe.

Further, the hole wall of the pier grouting sleeve is provided with an injection hole and a discharge hole.

Further, the steel pipe and the pier grouting sleeve are filled with mortar.

Furthermore, the mortar is ultra-high performance mortar.

Further, the top surface of the prefabricated platform is provided with a raised portion, and the raised portion is provided with the tongue and groove.

Further, it also includes fixing plates, which are respectively provided on the outer wall of the connection between the protrusion and the prefabricated pier and on the outer walls of the connection of the two prefabricated piers.

Further, fixed through holes are respectively provided on the side walls of the raised portion and the upper and lower end side walls of the prefabricated pier. The axes of the plurality of fixed through holes are parallel to each other. There are provided in the fixed through holes. Fixed steel bars, both ends of which extend out of the fixed through holes and pass through the fixed plate.

Further, it also includes an anchor provided at the end of the fixed steel bar.

The beneficial effects of the present invention are: through the design of tenons and tenon grooves, dangerous accidents such as overturning are prevented when splicing prefabricated caps and prefabricated piers, and the stability of the structure during the construction process is increased; pier grouting sleeves, bridge piers The arrangement of steel bars and platform steel bars can ensure the stability of the overall structure after grouting is completed, and increase the horizontal shear resistance of prefabricated assembled bridge piers with socket-type structures where grouting sleeves are used as joints; The arrangement further increases the horizontal shear resistance of the prefabricated assembled bridge piers with a socket structure using grouting sleeves for joints according to the invention, and increases safety.

Description of the drawings

Figure 1 is a front cross-sectional view of a prefabricated assembled bridge pier with a socket structure using a grouting sleeve for joints according to a specific embodiment of the present invention;

Figure 2 is a top view of a prefabricated cap platform of a prefabricated assembled bridge pier with a socket-type structure where the joint adopts a grouting sleeve according to the specific embodiment of the present invention;

Label description:

1. Prefabricated cap; 11. Rebar for cap;

2. Prefabricated pier; 21. Bridge pier grouting sleeve; 22. Bridge pier steel bar; 23. Injection hole; 24. Discharge hole;

3. Tongue and groove; 31. Steel pipe;

4. Tenon;

5. Fixed plate;

6. Fixed steel bars; 61. Anchors;

7. Mortar.

Detailed ways

In order to describe the technical content, achieved objectives and effects of the present invention in detail, the following description will be made in conjunction with the embodiments and the accompanying drawings.

The most critical idea of the present invention is to prevent dangerous accidents such as overturning when splicing prefabricated caps and prefabricated piers through the design of tenons and tenon grooves, and increase the stability of the structure during the construction process.

Please refer to Figures 1 and 2, a prefabricated assembled bridge pier with a socket-type structure using grouting sleeves for joints, including a prefabricated platform 1 and a prefabricated pier 2. The prefabricated pier 2 is installed on the prefabricated platform 1. , a plurality of the prefabricated piers 2 are installed in a stack; the top surface of the prefabricated platform 1 and the top surface of the prefabricated pier 2 are provided with tenons 3, and the bottom of the prefabricated piers 2 is provided with tenons 4, so The size of the tenon 4 is adapted to the tenon groove 3;

The bottom surface of the prefabricated pier 2 is provided with a pier grouting sleeve 21 that opens downward; a pier steel bar 22 is pre-embedded in the prefabricated pier 2, and one end of the pier steel bar 22 extends into the pier grouting hole on the bottom surface of the prefabricated pier 2. In the sleeve 21, the other end extends out of the top surface of the prefabricated pier 2 and extends into the pier grouting sleeve 21 of the adjacent prefabricated pier 2 above;

There are platform steel bars 11 embedded in the prefabricated platform 1. The platform steel bars 11 extend from the top surface of the prefabricated platform 1 and extend into the pier grouting sleeve 21 of the above prefabricated pier 2;

A steel pipe 31 is embedded in the tongue groove 3 , the size of the tongue 4 matches the steel pipe 31 , and the tongue 4 is embedded in the steel pipe 31 .

From the above description, it can be seen that the beneficial effect of the above-mentioned prefabricated assembled bridge piers using a socket-type structure of a grouting sleeve is: through the design of the tenon 4 and the tenon groove 3, when the prefabricated platform 1 and the prefabricated pier 2 are spliced to prevent dangerous accidents such as overturning and increase the stability of the structure during the construction process; the settings of the pier grouting sleeve 21, the pier steel bar 22 and the cap steel bar 11 can ensure the stability of the overall structure after the grouting is completed, increasing the The joints according to the present invention adopt a socket-type structure of grouting sleeves to improve the horizontal shear resistance of prefabricated assembled bridge piers; the provision of the steel pipe 31 further increases the horizontal shear resistance of the joints according to the present invention using a socket-type structure of grouting sleeves. Horizontal shear resistance for added safety.

Furthermore, the tenon 4 is covered with a steel sleeve, and the outer diameter of the steel sleeve is adapted to the steel pipe 31 .

It can be seen from the above description that the tenon 4 is covered with a steel sleeve, which further increases the horizontal shear resistance of the prefabricated assembled bridge pier with a socket-type structure using a grouting sleeve for the joint and increases the safety. .

Further, the hole wall of the pier grouting sleeve 21 is provided with an injection hole 23 and a discharge hole 24.

It can be seen from the above description that the arrangement of the injection hole 23 and the discharge hole 24 can more conveniently inject fixed materials, facilitate construction operations, and increase construction efficiency.

Further, the steel pipe 31 and the pier grouting sleeve 21 are filled with mortar 7 .

It can be seen from the above description that the mortar 7 can connect the tenon 4 provided in the steel pipe 31, the platform steel bar 11 extending out of the top surface of the prefabricated platform 1 and the pier steel bar 22 in the pier grouting sleeve 21 into a whole, ensuring that It improves the stability of the overall structure and increases the shear resistance of the horizontal plane at the connection.

Furthermore, the mortar 7 is ultra-high performance mortar.

As can be seen from the above description, ultra-high performance concrete (UHPC for short) is a new type of cement-based composite material with high strength, good toughness, good corrosion resistance, wear resistance and impermeability. The tensile strength is generally not Below 5MPa. UHPC with coarse aggregate removed can be regarded as a kind of mortar, that is, ultra-high performance mortar (UHPM for short).

Furthermore, the top surface of the prefabricated platform 1 is provided with a raised portion, and the raised portion is provided with the tongue and groove 3 .

Furthermore, it also includes fixing plates 5, which are respectively arranged on the outer wall of the connection between the protrusion and the prefabricated pier 2 and the outer wall of the connection between the two prefabricated piers 2.

Further, fixed through holes are respectively provided on the side walls of the raised portion and the upper and lower end side walls of the prefabricated pier 2. The axes of a plurality of fixed through holes are parallel to each other. There are provided in the fixed through holes There is a fixed steel bar 6, and both ends of the fixed steel bar 6 extend out of the fixed through hole and pass through the fixed plate 5.

Further, an anchor 61 is included, and the anchor 61 is provided at the end of the fixed steel bar 6 .

It can be seen from the above description that through the setting of the raised portion, the raised portion can be used to add fixed plates 5 and fixed steel bars 6, so that the raised rods and fixed steel bars 6 can be used to preliminarily fix the prefabricated pier 2 before grouting is carried out. The safety of construction is increased; the fixed steel bars 6 bolt the tenon and the tenon groove 3, further increasing the stability of the structure.

Embodiment 1

Please refer to Figures 1 and 2, a prefabricated assembled bridge pier with a socket-type structure using grouting sleeves for joints, including a prefabricated platform 1 and a prefabricated pier 2. The prefabricated pier 2 is installed on the prefabricated platform 1. , a plurality of the prefabricated piers 2 are installed in a stack; the prefabricated platform 1 is provided with a convex portion in the middle of the top surface, and the convex portion and the middle portion of the top surface of the prefabricated pier 2 are provided with tongue and groove 3, so The bottom of the prefabricated pier 2 is provided with a tenon 4, and a steel pipe 31 is embedded in the tenon groove 3. The size of the tenon 4 matches the steel pipe 31, and the tenon 4 is embedded in the steel pipe 31. ; The tenon 4 is covered with a steel sleeve, the outer diameter of the steel sleeve is adapted to the steel pipe 31; the bottom surface of the prefabricated pier 2 is provided with a pier grouting sleeve with an opening downwards 21; There are pier steel bars 22 pre-embedded in the prefabricated pier 2. One end of the pier steel bar 22 extends into the pier grouting sleeve 21 on the bottom surface of the prefabricated pier 2, and the other end extends out of the top surface of the prefabricated pier 2. and extends into the pier grouting sleeve 21 of the adjacent prefabricated pier 2 above; there are capping steel bars 11 embedded in the prefabricated capping platform 1, and the capping reinforcing bars 11 are inserted from the top of the prefabricated capping platform 1. The surface extends out and extends into the pier grouting sleeve 21 of the prefabricated pier 2 above; the hole wall of the pier grouting sleeve 21 is provided with an injection hole 23 and a discharge hole 24; the steel pipe 31 and The pier grouting sleeve 21 is filled with ultra-high performance mortar; it also includes a fixing plate 5. The fixing plates 5 are respectively provided on the outer wall of the connection between the bulge and the prefabricated pier 2 and on both sides. On the outer wall of the connection point of the prefabricated pier 2; fixed through holes are respectively provided on the side walls of the raised portion and the upper and lower end side walls of the prefabricated pier 2, and the axes of the plurality of fixed through holes are parallel to each other. A fixed steel bar 6 is provided in the fixed through hole, and both ends of the fixed steel bar 6 extend out of the fixed through hole and pass through the fixed plate 5; an anchor 61 is also included, and the anchor 61 is provided on the fixed through hole. The end of the fixed steel bar 6.

The above-mentioned joint adopts a socket-type structure of a grouting sleeve. The construction process of prefabricated assembled bridge piers is:

Step 1: Apply ultra-high performance mortar on the upper surface of the precast platform 1 and the raised part;

Step 2: Insert the tenon 4 of the prefabricated pier 2 into the tenon groove 3 of the prefabricated cap 1 with the steel pipe 31 installed, and the cap steel bar 11 on the prefabricated cap 1 extends into the pier grouting sleeve 21 of the prefabricated pier 2;

Step 3: Place the fixing plate 5 on the opposite side walls of the connection, penetrate the fixing plate 5 on one side, insert the fixing steel bar 6 into the fixing through hole, and pass it out from the other side of the through hole, and the fixing steel bar 6 penetrates The fixed plate 5 on the other side is then locked with the two ends of the fixed steel bar 6 through the anchors 61;

Step 4: Inject ultra-high performance mortar into the injection hole 23 until the ultra-high performance mortar overflows and flows out of the discharge hole 24;

Step 5: Apply ultra-high performance mortar on the top surface of the lower prefabricated pier 2, and insert the tenon 4 of the upper prefabricated pier 2 into the tenon 3 of the steel pipe 31 installed on the top surface of the lower prefabricated pier 2. The lower prefabricated The pier steel bars 22 above the pier 2 extend into the pier grouting sleeve 21 of the upper section of the prefabricated pier 2; set the fixing plate 5 on the side walls of the opposite sides of the connection, and insert the fixing steel bar 6 through the fixing plate 5 on one side to fix it. into the through hole, and pass out from the other side of the through hole, the fixed steel bar 6 penetrates the fixed plate 5 on the other side, and then locks the two ends of the fixed steel bar 6 through the anchors 61; inject super into the injection hole 23 High-performance mortar until the ultra-high-performance mortar overflows and flows out from the discharge hole 24;

Step 6: Repeat step 5 until the above-mentioned prefabricated assembled pier using a socket-type joint with a grouting sleeve reaches the elevation.

In summary, the present invention provides a joint that adopts a socket-type structure of grouting sleeves to prefabricate assembled bridge piers. Through the design of tenons and tenon grooves, risks such as overturning can be prevented when the prefabricated cap platform and prefabricated bridge piers are spliced. accidents, which increases the stability of the structure during the construction process; the settings of the pier grouting sleeves, bridge pier steel bars and capping steel bars can ensure the stability of the overall structure after the grouting is completed, and increases the use of grouting sleeves for the joints of the present invention The horizontal shear resistance of the prefabricated assembled bridge piers with the socket-type structure of the cylinder; through the setting of the protruding part, the protruding part can be used to add fixed plates and fixed steel bars, so that the protruding rods and fixed steel bars can be used to strengthen the prefabricated bridge piers before grouting. The bridge piers are initially fixed, which increases the safety of construction; the fixed steel bars bolt the tenon and the tenon groove, further increasing the stability of the structure. The arrangement of the steel pipe further increases the socket type of the joint according to the invention using a grouting sleeve. The horizontal shear resistance of the prefabricated assembled bridge pier is increased, and the safety is increased; the tenon 4 is covered with a steel sleeve, which further increases the prefabricated assembled bridge pier with a socket-type structure in which the joints of the present invention adopt grouting sleeves. The horizontal shear resistance increases safety; the setting of the injection hole and the discharge hole makes it easier to inject fixed materials, facilitates construction operations, and increases construction efficiency; by connecting the discharge hole and the injection hole The holes are arranged on the same horizontal plane, and the injection hole and the pier grouting sleeve are on the same horizontal plane, so that the injected fixing material can fully fill all the gaps in the connection, ensuring the stability of the overall structure; the mortar can set the The tenons in the steel pipe, the cap steel bars extending out of the top surface of the prefabricated cap platform, and the pier steel bars in the pier grouting sleeves are connected into a whole, ensuring the stability of the overall structure and increasing the shear resistance of the horizontal plane at the connection. Capability; ultra-high performance mortar has the characteristics of high strength, corrosion resistance, and good impermeability. Through ultra-high performance mortar, the entire structure can have strong tensile strength and reliability, increasing durability; adopts a socket structure The prefabricated assembled bridge piers combined with cast-in-place UHPC have a socket-type structure in the center, which can support the upper prefabricated bridge piers during construction, and UHPM is used to bond the tenon and tenon groove. The joint area is large and the bonding effect is better than the traditional high-strength mortar plane joints or structural glue dry joints, which can improve the shear strength of the splicing joints; UHPC is used as the existing material with high strength, corrosion resistance, wear resistance and impermeability. Casting materials can improve the integrity and seismic performance of prefabricated assembled bridge piers with a socket-type structure using cast-in-place UHPC materials for joints described in the present invention.

The above are only embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in related technical fields, are equally included in within the scope of patent protection of this invention.

Claims (3)

1. A prefabricated assembled bridge pier with a socket-type structure whose joints adopt grouting sleeves, which is characterized in that it includes a prefabricated pedestal and a prefabricated pier, and the prefabricated pier is installed on the prefabricated pier. A plurality of the prefabricated piers Stacked installation; the top surface of the prefabricated platform and the top surface of the prefabricated pier are provided with tenons, and the bottom of the prefabricated piers is provided with tenons, and the size of the tenons matches the tenon; The bottom surface of the prefabricated pier is provided with a pier grouting sleeve with an opening downward; pier steel bars are pre-embedded in the prefabricated pier, and one end of the pier steel bar extends into the pier grouting sleeve on the bottom surface of the prefabricated pier, and the other end Extend out the top surface of the prefabricated pier and extend into the pier grouting sleeve of the adjacent prefabricated pier above; There are capping steel bars embedded in the prefabricated capping platform, and the capping reinforcing bars extend from the top surface of the prefabricated capping platform and extend into the pier grouting sleeve of the prefabricated bridge pier above; A steel pipe is embedded in the tenon groove, a steel sleeve is set on the tenon, and the outer diameter of the steel sleeve matches the steel pipe; The hole wall of the pier grouting sleeve is provided with an injection hole and a discharge hole, and the steel pipe and the pier grouting sleeve are filled with mortar; The top surface of the prefabricated platform is provided with a raised portion, and the raised portion is provided with the tongue and groove; It also includes fixed plates, which are respectively provided on the outer wall of the connection between the protrusion and the prefabricated pier and the outer wall of the connection between the two prefabricated piers; Fixed through holes are respectively provided on the side walls of the raised portion and the upper and lower end side walls of the prefabricated pier. The axes of a plurality of fixed through holes are parallel to each other. Fixed steel bars are provided in the fixed through holes. Both ends of the fixed steel bar extend out of the fixed through hole and pass through the fixed plate, and the fixed steel bar penetrates the tenon. 2. The joints according to claim 1 adopt a socket-type structure of prefabricated assembled bridge piers with grouting sleeves, characterized in that the mortar is ultra-high performance mortar. 3. The prefabricated assembled bridge pier with a socket structure and a grouting sleeve as the joint according to claim 1, characterized in that it also includes an anchor, and the anchor is arranged at the end of the fixed steel bar.