Pier construction structure and method of construction thereof

Abstract

The application provides a bridge pier construction structure, which comprises a foundation pit, a foundation pile and a bearing platform arranged at the bottom of the foundation pit; the top of the bearing platform is provided with a bridge pier formwork, the bridge pier formwork comprises a formwork body, a plurality of opposite formwork holes are formed in the front surface and the back surface of the formwork body respectively, a front formwork block is arranged in the formwork hole of the front surface of the formwork body, and a back formwork block is arranged in the formwork hole of the back surface of the formwork body; the front formwork block and the back formwork block are connected through a U-shaped tensioning screw rod, mounting through holes are formed in the front formwork block and the back formwork block, and vertical rods are arranged in the through holes. The application also provides a bridge pier construction method. The U-shaped tensioning screw rod is reserved in the concrete, and the detachable formwork and the U-shaped tensioning screw rod are reserved on the bridge pier as a ladder after maintenance, so that the use efficiency of the tensioning screw rod is improved, the time for additionally installing the ladder is saved, the construction efficiency is improved, and the ladder has better stability.

Description

Technical Field

[0001] This invention relates to the field of high-end equipment manufacturing, and in particular to a bridge pier construction structure and its construction method. Background Technology

[0002] In recent years, with the leapfrog development of bridge construction in my country, and due to land use restrictions, especially when road lines intersect with existing roads or rivers, bridge piers have become an extremely important component of bridge engineering.

[0003] Currently, existing bridge pier construction methods typically employ a combination of pier formwork and cast-in-place construction. Depending on site requirements, vertical ladders are sometimes installed on the piers for workers to climb. However, most existing vertical ladders are installed via hoisting, a process that consumes significant manpower and resources and takes up considerable time, greatly impacting pier construction efficiency. Furthermore, the stability of existing vertical ladders is insufficient; after prolonged exposure to wind and sun, their stability decreases, posing risks to construction.

[0004] Therefore, there is an urgent need to design a new type of bridge pier construction structure and its construction method. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a new type of bridge pier construction structure and construction method, so as to avoid the problems of low construction efficiency, low stability and poor safety of ladders caused by the use of existing construction structures and methods.

[0006] The present invention solves the above-mentioned technical problems by adopting the following technical solutions:

[0007] A bridge pier construction structure includes a foundation pit and foundation piles and a pile cap disposed at the bottom of the foundation pit, wherein the top end of the foundation piles is connected to the bottom end of the pile cap; a bridge pier formwork is disposed on the top of the pile cap; the bridge pier formwork includes a formwork body, wherein multiple opposing formwork holes are respectively opened on the front and back sides of the formwork body, and positive formwork blocks are respectively disposed in the formwork holes on the front side of the formwork body, and negative formwork blocks are respectively disposed in the formwork holes on the back side of the formwork body; wherein the positive formwork blocks and the negative formwork blocks are connected by U-shaped tie rods, and both the positive formwork blocks and the negative formwork blocks are provided with installation through holes, wherein vertical rods are passed through the through holes.

[0008] As one of the preferred embodiments of the present invention, the template body is further provided with reinforcing ribs.

[0009] As one of the preferred embodiments of the present invention, the thickness of both the positive template block and the negative template block is not less than the thickness of the template body.

[0010] A method for constructing bridge piers includes the following steps:

[0011] Step 1: Place the pile cage inside the pile hole and fix the pile cage to the pile hole;

[0012] Step 2: Pour concrete into the pile hole;

[0013] Step 3: Curing the concrete poured into the pile hole;

[0014] Step 4: After the curing is completed, begin excavating the foundation pit from above the foundation piles.

[0015] Step 5: Dig drainage trenches around the bottom of the foundation pit, and at the same time dig drainage pits at the bottom of the foundation pit, and install drainage pumps in the drainage pits;

[0016] Step Six: Construct a water-retaining slope around the top of the foundation pit;

[0017] Step 7: Break the concrete at the top of the pile to expose the reinforcing steel, and bend the reinforcing steel away from the axis.

[0018] Step 8: Weld the reinforcing bars of the foundation cage to the pile foundation, and weld vertical reinforcing bars inside the foundation cage;

[0019] Step 9: After installing the foundation formwork on the foundation cage, begin pouring concrete in layers;

[0020] Step 10: Curing the completed foundation;

[0021] Step 11: After the curing is completed, remove the foundation formwork, then roughen the top of the foundation and install the pier cage. The bottom of the pier cage is welded to the vertical steel bars.

[0022] Step 12: Install the formwork body around the bridge pier cage;

[0023] Step 13: Install the positive template block in the template hole on the front of the template body, and insert the U-shaped tie rod into the positive template block;

[0024] Step Fourteen: Install a reverse template block inside the template hole on the reverse side of the template body, insert the reverse template block into the other end of the U-shaped tie rod, and then fix it with bolts;

[0025] Step 15: Insert the vertical rod into the mounting through holes of the positive and negative template blocks;

[0026] Step 16: Pour concrete into the formwork body;

[0027] Step 17: Curing the completed bridge piers;

[0028] Step 18: After the curing is completed, the vertical rods are pulled out of the installation through holes, the formwork body is removed, and finally the soil is backfilled into the foundation pit to complete the construction of the bridge pier.

[0029] As one of the preferred embodiments of the present invention, in steps two and sixteen, when pouring concrete into the foundation pile hole and the formwork body, the pouring pipe opening is kept within 2 meters above the concrete liquid surface, the pouring height is not greater than 40cm each time, and the concrete is vibrated after each pouring is completed.

[0030] As one of the preferred embodiments of the present invention, in steps three, ten and seventeen, when curing the corresponding poured concrete, the curing period is 7 days, and the temperature difference between the concrete center and the concrete surface is kept not greater than 20°C, and the temperature difference between the concrete surface and the environment is not greater than 20°C.

[0031] As one of the preferred embodiments of the present invention, in step four, a foundation pit is excavated above the foundation pile. When the top of the foundation pile is reached, manual labor is used to continue excavating down 1 meter to expose the bottom of the foundation pit.

[0032] As one of the preferred embodiments of the present invention, in step nine, when pouring concrete in layers, the height of each pour shall not exceed 40cm, and the concrete shall be vibrated after each pour.

[0033] As one of the preferred embodiments of the present invention, before step twelf, the following steps are also included: applying a release agent to the inner wall of the template body, and applying a release agent to the inner side of the positive template block and the negative template block.

[0034] The advantages of this invention compared to existing technologies are as follows: This invention replaces the traditional tie rods used in the installation of bridge pier formwork with U-shaped tie rods, and replaces the stress points of the U-shaped tie rods with detachable formwork. During the pouring and curing stages, this invention can retain the U-shaped tie rods in the concrete, and after curing, both the detachable formwork and the U-shaped tie rods can be retained on the bridge pier for use as ladders or other functional structures, thereby improving the efficiency of tie rod use, saving time on installing additional ladders, improving construction efficiency, and also giving the ladders better stability and extending their service life. Attached Figure Description

[0035] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a front view of the bridge pier construction structure of the present invention;

[0037] Figure 2 This is a rear view of the bridge pier construction structure of the present invention;

[0038] Figure 3 This is a schematic diagram of the U-shaped tie rod structure after the positive template block of the present invention has been installed;

[0039] Figure 4 This is a schematic diagram of the U-shaped tie rod structure after the anti-template block is installed according to the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of the inverse template block and the vertical rod of the present invention;

[0041] Figure 6 This is a schematic diagram of step four of the bridge pier construction method of the present invention;

[0042] Figure 7 This is a schematic diagram of step ten of the bridge pier construction method of the present invention;

[0043] Figure 8 This is a schematic diagram of step eleven of the bridge pier construction method of the present invention;

[0044] Figure 9 This is a schematic diagram of step 12 of the bridge pier construction method of the present invention;

[0045] Figure 10 This is a schematic diagram of step thirteen of the bridge pier construction method of the present invention;

[0046] Figure 11 This is a schematic diagram of step fourteen of the bridge pier construction method of the present invention;

[0047] Figure 12 This is a schematic diagram of step fifteen of the bridge pier construction method of the present invention;

[0048] Figure 13 This is a schematic diagram of step eighteen of the bridge pier construction method of the present invention.

[0049] In the attached diagram, the components represented by each number are as follows:

[0050] 1. Foundation piles; 2. Pier caps; 21. Vertical reinforcing bars; 22. Pier cap formwork; 3. Pier formwork; 31. Formwork body; 32. Positive formwork block; 33. U-shaped tie rods; 34. Reverse formwork block; 35. Vertical rods; 36. Installation through holes; 37. Reinforcing ribs; 4. Foundation pit. Detailed Implementation

[0051] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] Example 1:

[0053] Please see Figures 1-5 The pier construction structure of this embodiment includes a foundation pile 1, a pile cap 2, a pier formwork 3, and a foundation pit 4; wherein the foundation pile 1 and the pile cap 2 are located at the bottom of the foundation pit 4, and the top of the foundation pile 1 is connected to the bottom of the pile cap 2; the pier formwork 3 is located at the top of the pile cap 2.

[0054] Specifically, in this embodiment, the pier template 3 includes a template body 31; the front and back of the template body 31 are respectively provided with a plurality of opposing template holes, and the template holes on the front of the template body 31 are respectively provided with positive template blocks 32, and the template holes on the back of the template body 31 are respectively provided with negative template blocks 34; wherein, the positive template blocks 32 and the negative template blocks 34 are connected by U-shaped tie rods 33, and both the positive template blocks 32 and the negative template blocks 34 are provided with mounting through holes 36, and vertical rods 35 pass through the through holes.

[0055] Meanwhile, in this embodiment, the template body 31 is also provided with reinforcing ribs 37.

[0056] Furthermore, the thickness of both the positive template block 32 and the negative template block 34 is not less than the thickness of the template body 31.

[0057] Example 2:

[0058] Please see Figures 1-13 This embodiment of a bridge pier construction method includes pile foundation holes and the following steps:

[0059] Step 1: Place the pile cage inside the pile hole and fix the pile cage to the pile hole;

[0060] Step 2: Pour concrete into the pile hole; during pouring, keep the pouring pipe opening within 2 meters above the concrete surface, and each pouring height should not exceed 40cm. After each pour, vibrate the concrete.

[0061] Step 3: Curing the concrete poured into the pile hole; the curing period is 7 days, and the temperature difference between the concrete core and the concrete surface should not exceed 20℃, and the temperature difference between the concrete surface and the environment should not exceed 20℃.

[0062] Step 4: After curing, begin excavating foundation pit 4 from above pile 1. When the top of pile 1 is reached, switch to manual excavation and continue digging down 1 meter to expose the bottom of foundation pit 4 (e.g., Figure 6 (as shown);

[0063] Step 5: Excavate drainage trenches around the bottom of foundation pit 4, and at the same time, excavate drainage pits at the bottom of foundation pit 4, and install drainage pumps in the drainage pits;

[0064] Step Six: Construct a water-retaining slope around the top of foundation pit 4;

[0065] Step 7: Break the concrete at the top of pile 1 to expose the reinforcing steel, and bend the reinforcing steel of pile 1 away from the axis.

[0066] Step 8: Weld the reinforcing bars of the foundation cage to the pile 1, and weld the vertical reinforcing bars 21 inside the foundation cage;

[0067] Step 9: After installing the foundation formwork 22 on the foundation cage, begin pouring concrete in layers; the height of each pour should not exceed 40cm, and the concrete should be vibrated after each pour.

[0068] Step 10: Curing of the completed foundation 2 (e.g., Figure 7 (As shown); The curing period is 7 days, and the temperature difference between the concrete center and the concrete surface should not exceed 20℃, and the temperature difference between the concrete surface and the environment should not exceed 20℃.

[0069] Step 11: After curing, remove the foundation formwork 22 (e.g., Figure 8 (as shown), then roughen the top of the pier cap 2 and install the pier cage, with the bottom of the pier cage welded to the vertical steel bar 21;

[0070] Step 12: Apply release agent to the inner wall of the formwork body 31, and apply release agent to the inner sides of the positive formwork block 32 and the negative formwork block 34. Then install the formwork body 31 around the pier cage (e.g., Figure 9 (as shown);

[0071] Step 13: Install the positive template block 32 in the template hole on the front of the template body 31, and insert the U-shaped tie rod 33 into the positive template block 32 (e.g., Figure 10 (as shown);

[0072] Step Fourteen: Install a reverse template block 34 inside the template hole on the reverse side of the template body 31, insert the reverse template block 34 into the other end of the U-shaped tie rod 33, and then fix it with bolts (e.g. Figure 11 (as shown);

[0073] Step 15: Insert the vertical rod 35 into the mounting through holes 36 of the positive template block 32 and the negative template block 34 (e.g., Figure 12 (as shown);

[0074] Step 16: Pour concrete into the formwork body 31; during pouring, keep the pouring pipe opening within 2 meters above the concrete surface, and each pouring height should not exceed 40cm. After each pouring, vibrate the concrete.

[0075] Step 17: Curing the completed bridge piers; the curing period is 7 days, and the temperature difference between the concrete core and the concrete surface should not exceed 20℃, and the temperature difference between the concrete surface and the environment should not exceed 20℃.

[0076] Step 18: After curing, remove the vertical rod 35 from the installation through hole 36, then remove the formwork body 31, and finally backfill the foundation pit 4 to complete the construction of the bridge pier (e.g., Figure 13 (As shown).

[0077] Application principle:

[0078] This invention replaces the traditional tie rods used in bridge pier formwork installation with U-shaped tie rods 33, and changes the stress points of the U-shaped tie rods 33 to detachable positive formwork blocks 32 and negative formwork blocks 34. During the pouring and curing stages, the U-shaped tie rods 33 can be retained in the concrete, and after curing, the detachable positive formwork blocks 32 and negative formwork blocks 34 and the U-shaped tie rods 33 can all be retained on the bridge pier for use as ladders or other functional structures. This improves the efficiency of tie rod usage, saves time on installing additional ladders, increases construction efficiency, and also makes the ladders more stable and extends their service life.

[0079] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0080] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A bridge pier construction structure, comprising a foundation pit (4) and foundation piles (1) and a pile cap (2) disposed at the bottom of the foundation pit (4), wherein the top end of the foundation piles (1) is connected to the bottom end of the pile cap (2); characterized in that, The top of the pier (2) is provided with a pier template (3); the pier template (3) includes a template body (31), the front and back of the template body (31) are provided with a plurality of opposing template holes, and the template holes on the front of the template body (31) are respectively provided with a positive template block (32), and the template holes on the back of the template body (31) are respectively provided with a negative template block (34); wherein, the positive template block (32) and the negative template block (34) are connected by a U-shaped tie rod (33), and both the positive template block (32) and the negative template block (34) are provided with an installation through hole (36), and a vertical rod (35) passes through the through hole.

2. The bridge pier construction structure according to claim 1, characterized in that, The template body (31) is also provided with reinforcing ribs (37).

3. The bridge pier construction structure according to claim 1, characterized in that, The thickness of both the positive template block (32) and the negative template block (34) is not less than the thickness of the template body (31).

4. A method for constructing bridge piers, characterized in that, Includes the following steps: Step 1: Place the pile cage inside the pile hole and fix the pile cage to the pile hole; Step 2: Pour concrete into the pile hole; Step 3: Curing the concrete poured into the pile hole; Step 4: After the curing is completed, start excavating the foundation pit (4) from above the foundation pile (1); Step 5: Dig drainage trenches around the bottom of the foundation pit (4), and at the same time dig drainage pits at the bottom of the foundation pit (4), and install drainage pumps in the drainage pits; Step 6: Set up a water-retaining slope around the top of the foundation pit (4); Step 7: Break the concrete at the top of the foundation pile (1) to expose the reinforcing steel, and bend the reinforcing steel of the foundation pile (1) away from the axis. Step 8: Weld the reinforcing bars of the foundation cage to the foundation pile (1), and weld the vertical reinforcing bars (21) inside the foundation cage; Step 9: After installing the foundation formwork (22) on the foundation cage, begin pouring concrete in layers; Step 10: Curing of the completed foundation (2); Step 11: After the curing is completed, remove the foundation formwork (22), then roughen the top of the foundation (2) and install the pier cage. The bottom of the pier cage is welded to the vertical steel bar (21). Step 12: Install the formwork body (31) around the pier cage; Step 13: Set a positive template block (32) in the template hole on the front of the template body (31), and insert the U-shaped tie rod (33) into the positive template block (32); Step 14: Install a reverse template block (34) in the template hole on the reverse side of the template body (31), insert the reverse template block (34) into the other end of the U-shaped tie rod (33), and then fix it with bolts; Step 15: Insert the vertical rod (35) into the mounting through hole (36) of the positive template block (32) and the negative template block (34); Step 16: Pour concrete into the formwork body (31); Step 17: Curing the completed bridge piers; Step 18: After the curing is completed, the vertical rod (35) is pulled out from the installation through hole (36), the template body (31) is removed, and finally the soil is backfilled into the foundation pit (4) to complete the construction of the bridge pier.

5. The bridge pier construction method according to claim 4, characterized in that, In steps two and sixteen, when pouring concrete into the foundation pile hole and the formwork body (31), keep the pouring pipe opening within 2 meters above the concrete liquid surface, and the pouring height each time is no more than 40cm. After each pouring is completed, the concrete is vibrated.

6. The bridge pier construction method according to claim 4, characterized in that, In steps three, ten, and seventeen, when curing the poured concrete, the curing period is 7 days, and the temperature difference between the concrete center and the concrete surface is kept no greater than 20°C, and the temperature difference between the concrete surface and the ambient temperature is no greater than 20°C.

7. The bridge pier construction method according to claim 4, characterized in that, In step four, a foundation pit (4) is dug above the foundation pile (1). When the foundation pile (1) is dug to the top, a worker is taken over to continue digging down 1 meter to expose the bottom of the foundation pit (4).

8. The bridge pier construction method according to claim 4, characterized in that, In step nine, when pouring concrete in layers, the height of each pour should not exceed 40cm, and the concrete should be vibrated after each pour.

9. The bridge pier construction method according to claim 4, characterized in that, Before step 12, the following steps are also included: applying a release agent to the inner wall of the template body (31) and applying a release agent to the inner side of the positive template block (32) and the negative template block (34).

Images