A method and system for controlling the heat of hydration in the casting of TY piers.

Abstract

This invention discloses a method and system for controlling the heat of hydration during the casting of a TY pier. The method includes: S100, creating a connecting groove downwards along the bottom contour of the pier body on the surface of the abutment; S200, placing the lower half of a first steel cylinder and a second steel cylinder in the connecting groove; S300, constructing formwork for the pier body and casting the pier body in sections until it is flush with the top of the first steel cylinder; S400, removing the lower half of the first and second steel cylinders and casting the lower half of the first and second post-cast sections; S500, placing the upper half of the second steel cylinder on the already cast plane, continuing to construct formwork upwards, and casting the pier body in sections until it is flush with the top of the second steel cylinder; S600, removing the second steel cylinder and casting the upper half of the second post-cast section; S700, sequentially casting the inclined legs and cap beam above the pier body in sections to complete the casting of the entire TY pier. This method prevents the generation of excessive heat of hydration during the casting process, which could affect the strength of the TY pier and cause temperature cracks, thus affecting the safety of the bridge in its later use.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering technology, and more specifically, relates to a method and system for controlling the heat of hydration during the casting of TY piers. Background Technology

[0002] During the pouring of large-volume concrete structures, the cement hydration reaction releases a large amount of heat, a phenomenon known as "heat of hydration." If this heat of hydration is not effectively controlled, it can lead to excessively high internal temperatures in the concrete, causing a series of problems, including but not limited to temperature cracks, reduced strength, and decreased durability. In bridge construction, to ensure the strength of the piers, the common construction method is to directly pour concrete on-site at the designed location, connecting it integrally with the abutment. However, a large proportion of bridges are spanning rivers or seas, with piers located in the river or sea. Pouring concrete into these piers already presents challenges; controlling the heat of hydration during pouring further complicates the process.

[0003] Currently, most bridge pier construction methods involve designing the piers as hollow structures. Cooling is achieved through air convection or water pipes within the hollow areas. Specifically, the pier body of the proposed curved, ultra-high bridge is designed as a column-slab hollow structure. The concrete used for pouring the pier body is primarily low-heat-of-hydration slag silicate cement. Construction is then carried out as follows: First, the pier concrete is poured in layers, with formwork erected and the pouring temperature of each layer controlled. Temperature sensors and heat dissipation pipes are embedded. The surface and core temperatures of the pier concrete are collected using the sensors. When the temperature difference between the surface and core temperatures reaches a set value, the heat dissipation pipes are used to control the temperature difference within an ideal range.

[0004] This method of pier construction can control the heat of hydration of the pier to a certain extent, effectively preventing the formation of temperature stress cracks. However, it leaves a large number of holes in the pier during the pouring process, which can damage the overall structure of the pier and affect its strength, potentially having the opposite effect. Therefore, a TY pier pouring method and system that controls the heat of hydration generated in the concrete during pouring is needed to control the heat of hydration generated in the concrete, while avoiding damage to the pier structure and ensuring the strength of the pier. Summary of the Invention

[0005] To address the aforementioned deficiencies or improvement needs of existing technologies, this invention provides a method and system for controlling the heat of hydration during the casting of TY piers. During pier casting, a first and second post-cast section are reserved. The first-cast section is cast first, and the reserved spaces in the vertically positioned first and second post-cast sections are used for heat dissipation before the second and first post-cast sections are cast. This prevents the generation of excessive heat of hydration during casting, which could affect the strength of the TY pier and cause temperature cracks, thus compromising the safety of the bridge in its later use.

[0006] To achieve the above objectives, according to a first aspect of the present invention, a method for controlling the heat of hydration in the casting of TY piers is provided, comprising the following steps:

[0007] S100. Determine the position of the pier body on the pile cap and the dimensions of the bottom of the pier body. Cut a connecting groove downward along the outline of the bottom of the pier body on the surface of the pile cap and clean it thoroughly.

[0008] S200. A first steel barrel is set at the center of the connecting groove, and the lower half of a second steel barrel is set on both sides of the first steel barrel and fixed thereon.

[0009] S300. According to the design dimensions of TY pier, formwork is erected for the pier body, and the pier body is poured in sections until it is flush with the top of the first steel barrel.

[0010] S400. Take out the lower half of the first steel barrel and the second steel barrel, and pour the first steel barrel and the lower half of the second steel barrel in their original positions in the pier body to form the lower half of the first post-cast section and the second post-cast section.

[0011] S500. Set the upper half of the second steel barrel on the plane of the already poured part, continue to support the formwork for the part above the first steel barrel, and pour the pier body in sections until it is flush with the top of the second steel barrel.

[0012] S600. Remove the second steel bucket and pour concrete at the original position of the second steel bucket in the pier body to form the upper half of the second post-cast section.

[0013] S700, the inclined legs and cap beams above the pier are poured in sections in sequence to complete the pouring of the entire TY pier.

[0014] Furthermore, in step S200, the first steel barrel located at the bottom of the pier is shorter than the second steel barrels on both sides. After the erection is completed, the tops of the two are pre-fixed.

[0015] The second steel cylinders on both sides are tilted towards the middle to control their distance from the boundary of the pier body, so as to avoid the boundary of the pier body being too thin, which would cause quality problems during the pouring process.

[0016] Furthermore, step S200 specifically includes the following steps:

[0017] S201. Set the first steel barrel vertically to ensure that its bottom surface is in close contact with the center of the connecting groove;

[0018] S202. Determine the inclination degree of the second steel barrel according to the dimensions of the pier body, and set the bottom of the second steel barrel as an sloping opening according to the inclination degree;

[0019] S203. The lower half of the two second steel barrels are symmetrically inclined towards the middle relative to the first steel barrel to ensure that their bottom surface is in close contact with the bottom surface of the connecting groove.

[0020] S204. Temporarily fix the first and second steel drums by erecting a steel frame on top of the lower half of the first and second steel drums;

[0021] S205. The surface of the connecting groove, except for the positions where the first and second steel barrels are installed, is roughened and anchoring steel bars are installed.

[0022] Furthermore, in step S300, to facilitate heat dissipation during the pier casting process, a segmented casting method is adopted. The specific operation is as follows:

[0023] S301. Complete the binding of steel bars and the erection of the bottom formwork according to the design dimensions of the pre-cast section of the pier body. When binding the steel bars, connect them with the anchoring steel bars in the connecting groove.

[0024] S302. After pouring the bottom layer of concrete for the pier body, vibrating and curing it, then erect the formwork upwards.

[0025] S303. Repeat step S302 until the concrete is poured to the same level as the top of the first steel cylinder, then remove the formwork.

[0026] Furthermore, in step S302, after the bottom of the pier body is poured to a reliable height, to ensure that the lower half of the first and second steel cylinders will not tip over, the fixing supports of the two are removed to prevent the supports from affecting the subsequent pouring.

[0027] Furthermore, in steps S400 and S600, the method for pulling the second steel barrel out of the pre-cast section is as follows: a support is set at one end of the pre-cast section, the support is fixedly connected to the exposed reinforcing bars on the pre-cast section, and a pulley is set on the support; the pulley is located on the extension line of the axis of the second steel barrel, the steel cable of the crane passes around the pulley and connects to the inside of the second steel barrel, and the second steel barrel is pulled out of the pre-cast section along its axis by the crane.

[0028] Furthermore, a temporary support structure is set at the opening where the second steel barrel is pulled out. The bottom of the temporary support structure is fixed with a fulcrum, and a support plate that rotates around the fulcrum is set on the fulcrum. The support plate and the pre-cast section support are equipped with a buffer assembly so that the second steel barrel falls on the support plate after it is pulled out. Then, the lifting point of the second steel barrel is adjusted to lift it down from the pre-cast section.

[0029] Furthermore, both the first and second steel drums are hollow cylindrical structures made of steel with good thermal conductivity. They consist of two semi-circular cylindrical surfaces with smooth outer surfaces. Connecting plates are provided on the inner side of the two connecting surfaces. The connecting plates on the two cylindrical surfaces are connected by bolts to splice them into a cylindrical shape.

[0030] Furthermore, the first steel barrel is a hollow cylindrical structure made of steel with good thermal conductivity. It is divided into at least three cylindrical surfaces, including at least one pre-disassembled cylindrical surface and multiple post-disassembled cylindrical surfaces. The two sides of the pre-disassembled cylindrical surface are connected to the post-disassembled cylindrical surfaces by beveled openings, and the openings of the beveled openings on both sides face the central axis. The connection between the pre-disassembled cylindrical surface and the post-disassembled cylindrical surface is also provided with a connecting plate facing inward. The pre-disassembled cylindrical surface and the post-disassembled cylindrical surface are connected by bolts to form a complete cylindrical structure through the connecting plate.

[0031] When removing it from the pre-cast section, remove the bolts between the first and second column surfaces. After removal, tap the first column surface to separate it from the pre-cast section into the first steel cylinder. After separation, lift it out. Then lift the second column surface out in the same way.

[0032] The second steel drum has the same structural composition as the first steel drum.

[0033] According to another aspect of the present invention, a TY pier casting system for controlling the heat of hydration is provided, comprising:

[0034] Cleaning module: Used to determine the position of the pier body on the foundation and the dimensions of the bottom of the pier body, to cut a connecting groove downward along the bottom contour of the pier body on the surface of the foundation, and to clean it thoroughly;

[0035] Steel barrel fixing module: used to set the first steel barrel in the center of the connecting groove, set the lower half of the second steel barrel on both sides of the first steel barrel, and fix them;

[0036] First casting module: used to support the formwork of the pier body according to the design dimensions of TY pier, and to cast the pier body in sections until it is flush with the top of the first steel barrel;

[0037] The second casting module is used to remove the lower half of the first and second steel barrels and cast the first and second steel barrels in their original positions in the pier body to form the lower half of the first and second post-cast sections.

[0038] The third casting module is used to set the upper half of the second steel barrel on the already cast part plane to continue to support the part above the first steel barrel, and to cast the pier body in sections until it is flush with the top of the second steel barrel.

[0039] The fourth casting module is used to remove the second steel cylinder and cast it in its original position in the pier body to form the upper half of the second post-cast section.

[0040] The fifth pouring module is used to pour the inclined legs and cap beams above the pier in sections in sequence, thus completing the pouring of the entire TY pier.

[0041] In summary, compared with the prior art, the above-described technical solutions conceived by this invention can achieve the following beneficial effects:

[0042] 1. The TY pier casting method of the present invention, during the casting of the pier body, reserves a first post-cast section and a second post-cast section, and firstly casts the first section. The reserved positions of the vertically set first and second post-cast sections are used for heat dissipation, and then the first and second post-cast sections are cast. This prevents the generation of a large amount of hydration heat during the casting process, which would affect the strength of the TY pier and cause temperature cracks in the TY pier, thus affecting the safety of the bridge in the later use.

[0043] 2. The TY pier casting method of the present invention sets a shorter first steel barrel and a longer second steel barrel, and the top of the second steel barrel is placed at an angle towards the middle, so that its heat dissipation surface is arranged according to the characteristics of the pier body being narrower at the top and wider at the bottom, so that the heat dissipation of each layer of the pier body can achieve a good effect during the casting process, and will not affect the casting structure of the pier body.

[0044] 3. The TY pier casting method of the present invention divides the first steel barrel and the second steel barrel into a column surface to be removed first and a column surface to be removed later. When disassembling the two, since the column surface to be removed first can be removed towards the inner side close to the central axis, it is easier for it to detach from the first-cast section during the disassembly process, making it easier to lift out. At the same time, it also avoids structural damage to the first-cast section during the disassembly process. Attached Figure Description

[0045] Figure 1 This is a schematic flowchart of a method for controlling the heat of hydration in casting TY piers according to an embodiment of the present invention;

[0046] Figure 2 This is a schematic diagram of the TY pier structure, illustrating a method for controlling the heat of hydration in the casting of TY piers according to an embodiment of the present invention.

[0047] Figure 3 This is an embodiment of the present invention. Figure 2 Schematic diagram of section AA;

[0048] Figure 4 This is an embodiment of the present invention. Figure 2 Schematic diagram of the EE section;

[0049] Figure 5 This is a schematic diagram of the specific process of step S200 in a method for controlling the heat of hydration of a TY pier according to an embodiment of the present invention.

[0050] Figure 6This is a schematic diagram of the specific process of step S300 in a method for controlling the heat of hydration of a TY pier according to an embodiment of the present invention.

[0051] Figure 7 This is a schematic diagram of the specific process of step S400 in a method for controlling the heat of hydration of a TY pier according to an embodiment of the present invention.

[0052] Figure 8 This is a schematic diagram of the specific process of step S500 in a method for controlling the heat of hydration of a TY pier according to an embodiment of the present invention.

[0053] Figure 9 This is a schematic diagram of the specific process of step S600 in a method for controlling the heat of hydration of a TY pier according to an embodiment of the present invention.

[0054] Figure 10 This is a schematic diagram of the overall structure of the first steel barrel in Embodiment 2 of the present invention;

[0055] Figure 11 This is a schematic diagram of the end face structure of the first steel barrel in Embodiment 2 of the present invention.

[0056] In all the accompanying drawings, the same reference numerals indicate the same technical features, specifically: 1-pier cap, 2-pier body, 21-pre-cast section, 22-first post-cast section, 23-second post-cast section, 24-first steel barrel, 241-first-removed column surface, 242-removed column surface, 243-connecting plate, 25-second steel barrel, 3-sloping leg, 4-cap beam. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0058] Example 1

[0059] like Figure 1-4 As shown, a method for controlling the heat of hydration in the casting of TY piers specifically includes the following steps:

[0060] S100. Determine the position of the pier body 2 on the foundation 1 and the dimensions of the bottom of the pier body 2. Open a connecting groove downward along the bottom outline of the pier body 2 on the surface of the foundation 1 and clean it.

[0061] S200. A first steel barrel 24 is provided at the center of the connecting groove, and the lower half of a second steel barrel 25 is provided on both sides of the first steel barrel 24 and fixed thereon.

[0062] S300. According to the design dimensions of TY pier, formwork is erected for pier body 2, and pier body 2 is poured in sections until it is flush with the top of the first steel barrel 24.

[0063] S400, Remove the lower half of the first steel barrel 24 and the second steel barrel 25, and pour the first steel barrel 24 and the lower half of the second steel barrel 25 in their original positions in the pier body 2 to form the lower half of the first post-cast section 22 and the second post-cast section 23.

[0064] S500. Set the upper half of the second steel barrel 25 on the plane of the already poured part, continue to support the formwork for the part above the first steel barrel 24, and pour the pier body 2 in sections until it is flush with the top of the second steel barrel 25.

[0065] S600. Take out the second steel barrel 25 and pour it in the original position of the second steel barrel 25 in the pier body 2 to form the upper half of the second post-cast section 23.

[0066] S700, the inclined leg 3 and cap beam 4 above the pier body 2 are poured in sections in sequence to complete the pouring of the entire TY pier.

[0067] In step S100, since the foundation 1 and the pier body 2 are not poured simultaneously, there is a time difference between their pouring, and they are only connected at their contact surfaces. In this situation, the connection may be weak. Therefore, a connecting groove with the same shape as the bottom surface of the pier body 2 is cut into the surface of the foundation 1, allowing the pier body 2 to be poured upwards along the inside of the connecting groove, thus making the connection stronger. Furthermore, to ensure unobstructed connection, the gravel, dust, and other impurities in the connecting groove must be cleaned to maintain its cleanliness and further strengthen the connection between the foundation 1 and the pier body 2.

[0068] In step S200, because the pier body 2 has a structure that is thicker at the bottom and thinner at the top, the heat dissipation area requirements at the bottom and top are different. Furthermore, the number of steel cylinders that can be placed in this structure is also limited. To achieve good heat dissipation, a larger heat dissipation area is provided in the thicker section at the bottom. Specifically, the first steel cylinder 24 located at the bottom of the pier body 2 is shorter than the second steel cylinders 25 on either side. After erection, both are pre-fixed at their tops. Also, because the pier body 2 is thicker at the bottom and thinner at the top, the second steel cylinders 25 on both sides are inclined towards the middle to control their distance from the boundary of the pier body 2, preventing the boundary of the pier body 2 from being too thin and causing quality problems during pouring.

[0069] The first steel barrel 24 and the second steel barrel 25 are both hollow cylindrical structures made of steel with good thermal conductivity. They are composed of two semi-circular cylindrical surfaces with smooth outer surfaces. Connecting plates are provided on the inner side of the two connecting surfaces. The connecting plates on the two cylindrical surfaces are connected by bolts to splice them into a cylindrical shape.

[0070] like Figure 5 As shown, step S200 specifically includes the following steps:

[0071] S201. Set the first steel barrel 24 vertically to ensure that its bottom surface is in close contact with the center of the connecting groove;

[0072] S202. According to the dimensions of the pier body 2, determine the degree of inclination of the second steel barrel 25, and set the bottom of the second steel barrel 25 as an sloping opening based on the degree of inclination.

[0073] S203. The lower half of the two second steel barrels 25 are symmetrically inclined towards the middle relative to the first steel barrel 24 to ensure that their bottom surface is in close contact with the bottom surface of the connecting groove.

[0074] S204. A steel frame is erected on the top of the lower half of the first steel drum 24 and the second steel drum 25 to temporarily fix them;

[0075] S205. The surface of the connecting groove, except for the positions where the first steel barrel 24 and the second steel barrel 25 are installed, is roughened and anchoring steel bars are installed.

[0076] like Figure 6 As shown, in step S300, in order to facilitate heat dissipation of the pier body 2 during the pouring process, the pouring is carried out in segments. The specific operation is as follows:

[0077] S301. Complete the binding of steel bars and the erection of the bottom formwork according to the design dimensions of the first-cast section of pier body 2. When binding the steel bars, connect them with the anchoring steel bars in the connecting groove.

[0078] S302. After pouring the bottom layer of concrete for pier body 2, vibrating and curing it, then erect the formwork upwards.

[0079] S303. Repeat step S302 until the concrete is poured to the same level as the top of the first steel barrel 24, then remove the formwork.

[0080] In step S301, after the pier body 2 is poured to be flush with the top of the first steel barrel 24, it is necessary to start pouring the lower half of the first post-pouring section 22 and the second post-pouring section 23 at the location of the first steel barrel 24. When tying the reinforcing bars, it is only necessary to tie them to be flush with the top of the first steel barrel 24. A ring of operating space is reserved around the top of the lower half of the first steel barrel 24 and the second steel barrel 25. Except for the operating space, part of the tied reinforcing bars are exposed.

[0081] In step S302, after the bottom of the pier 2 is poured to a reliable height, ensure that the lower half of the first steel barrel 24 and the second steel barrel 25 will not tip over, and remove the fixing supports of the two to prevent the supports from affecting the subsequent pouring.

[0082] like Figure 7As shown, step S400 specifically includes the following steps:

[0083] S401. Loosen the bolts connecting the two cylindrical surfaces of the lower half of the first steel barrel 24 and the second steel barrel 25, so that the two cylindrical surfaces of the two barrels can be separated into independent components.

[0084] S402, knock and pry the lower half of the first steel barrel 24 and the second steel barrel 25 to separate them from the pre-cast section 21, pull one cylindrical surface along the axis of the steel barrel to pull it out completely, and then pull out the other cylindrical surface.

[0085] S403. Tie the steel reinforcement cages of the lower half of the first post-cast section 22 and the second post-cast section 23, and place them in the original positions of the lower half of the first steel bucket 24 and the second steel bucket 25.

[0086] S404. Pour the first post-pouring section 22 and the lower half of the second post-pouring section 23, and complete the vibration and curing.

[0087] Before placing the bundled rebar cage in step S403, the original positions of the lower half of the first steel drum 24 and the second steel drum 25 need to be cleaned. When binding the rebar cage, its height should also be higher than the top surface of the first steel drum 24.

[0088] like Figure 8 As shown, step S500 further includes the following steps:

[0089] S501. At the top of the lower half of the second post-cast section 23, the upper half of the second steel cylinder 25 is set along the extension position of the lower half of the second post-cast section 23 according to the degree of inclination.

[0090] S502. A steel frame is temporarily erected on the top of the upper half of the second steel drum 25 to fix it.

[0091] S503. Connect the exposed reinforcing bars in the first post-cast section 22 with the reinforcing bars exposed outside the operating space, and continue to tie the reinforcing bars upwards;

[0092] S504. Perform formwork and pour concrete in sections until the concrete is level with the top of the upper half of the second steel drum 25, then remove the formwork.

[0093] In step S503, after the pier body 2 is poured to be flush with the top of the upper half of the second steel barrel 25, it is necessary to start pouring the upper half of the second post-cast section 23 at the location of the upper half of the second steel barrel 25. When binding the reinforcing bars, it is only necessary to bind them to be flush with the top of the upper half of the second steel barrel 25. A ring of operating space is reserved around the top of the upper half of the second steel barrel 25. Except for the operating space, part of the bound reinforcing bars are exposed.

[0094] In step S502, after the pier body 2 is poured to a reliable height, to ensure that the upper half of the second steel barrel 25 will not tip over, the fixing support of the upper half of the second steel barrel 25 is removed to prevent the support from affecting the subsequent pouring.

[0095] like Figure 9 As shown, step S600 further includes the following steps:

[0096] S601. Loosen the bolts connecting the two cylindrical surfaces of the upper half of the second steel barrel 25 to separate the two cylindrical surfaces into independent parts.

[0097] S602. Knock and pry the upper half of the second steel barrel 25 to separate it from the pre-cast section 21. Pull one cylindrical surface along the axis of the steel barrel until it is completely pulled out, and then pull out the other cylindrical surface.

[0098] S603. Tie the steel reinforcement cage of the upper half of the second post-cast section 23 and place it in the original position of the lower half of the second steel bucket 25.

[0099] S604. Pour the upper half of the second post-pouring section 23 and complete vibration and curing.

[0100] Before placing the bundled rebar cage in step S603, the original position of the upper half of the second steel drum 25 needs to be cleaned. When binding the rebar cage, its height should also be higher than the top surface of the upper half of the second steel drum 25.

[0101] In steps S400 and S600, since the second steel cylinder 25 is placed at an angle in the pre-cast section 21, and after the concrete of the pre-cast section 21 has solidified, it is not easy for it to loosen from the second steel cylinder 25. Furthermore, when pulling it out, a vertical pulling force cannot be applied; instead, a force along its axial direction is required, otherwise the pre-cast section 21 will be damaged. In the construction of TY piers on water, the simplest way to apply pulling force is to use a crane, therefore the force applied by the crane needs to be changed. Specifically, a support is set at one end of the pre-cast section 21, and this support is fixedly connected to the exposed reinforcing bars on the pre-cast section 21. A pulley is installed on the support. The pulley is located on the extension line of the axis of the second steel cylinder 25. The crane's cable passes around the pulley and connects to the inside of the second steel cylinder 25. The second steel cylinder 25 is pulled out of the pre-cast section 21 along its axial direction by the crane.

[0102] During the process of pulling out the second steel barrel 25, since the second steel barrel 25 is in an inclined state, it will sway due to gravity after being pulled out. Given the limited working space on the pier 2, this poses a risk of injury to workers. Therefore, a temporary support structure is set up at the opening where the second steel barrel 25 is pulled out. This temporary support structure has a fixed fulcrum at its bottom, and a support plate that rotates around the fulcrum is installed on the fulcrum. A buffer assembly is installed between the support plate and the support of the pre-cast section 21, so that the second steel barrel 25 falls onto the support plate after being pulled out. Then, the lifting points of the second steel barrel 25 are adjusted to lift it down from the pre-cast section 21.

[0103] Example 2

[0104] like Figure 10 , 11 As shown in Embodiment 1, during the disassembly process, the first steel barrel 24 and the second steel barrel 25 were difficult to remove because they adhered to the concrete and there was no gap between them. In this embodiment, the rest is the same as in Embodiment 1, except that the first steel barrel 24 is divided into at least three cylindrical surfaces, including at least one pre-removable cylindrical surface 241 and multiple post-removable cylindrical surfaces 242. The two sides of the pre-removable cylindrical surface 241 are connected to the post-removable cylindrical surfaces 242 by beveled openings, and the openings of the beveled openings face the central axis. The connection between the pre-removable cylindrical surface 241 and the post-removable cylindrical surface 242 is also provided with a connecting plate 243 facing inward. The pre-removable cylindrical surface 241 and the post-removable cylindrical surface 242 are bolted together by the connecting plate 243 to form a complete cylindrical structure.

[0105] When removing it from the pre-cast section 21, the bolts between the first-removed column surface 241 and the second-removed column surface 242 are removed. After removal, the first-removed column surface 241 is tapped to detach it from the pre-cast section 21 into the first steel cylinder 24. After detachment, it is lifted out. Then the second-removed column surface 242 is lifted out in the same way.

[0106] The second steel barrel 25 has the same structural composition as the first steel barrel 24.

[0107] Example 3

[0108] This invention provides a TY pier casting system for controlling the heat of hydration, comprising:

[0109] Cleaning module: used to determine the position of pier 2 on the foundation 1 and the dimensions of the bottom of pier 2, to cut a connecting groove downward along the bottom contour of pier 2 on the surface of foundation 1, and to clean it.

[0110] Steel barrel fixing module: used to set the first steel barrel 24 in the center of the connecting groove, and to set the lower half of the second steel barrel 25 on both sides of the first steel barrel 24, and to fix them;

[0111] First casting module: used to support the formwork of the pier body 2 according to the design dimensions of TY pier, and to cast the pier body 2 in sections until it is flush with the top of the first steel barrel 24;

[0112] The second casting module is used to remove the lower half of the first steel barrel 24 and the second steel barrel 25, and to cast the lower half of the first steel barrel 24 and the second steel barrel 25 in their original positions in the pier body 2 to form the lower half of the first post-cast section 22 and the second post-cast section 23.

[0113] The third casting module is used to set the upper half of the second steel barrel 25 on the plane of the already cast part, continue to support the formwork for the part above the first steel barrel 24, and cast the pier body 2 in sections until it is flush with the top of the second steel barrel 25.

[0114] The fourth casting module is used to remove the second steel barrel 25 and cast it at its original position in the pier body 2 to form the upper half of the second post-cast section 23.

[0115] The fifth pouring module is used to pour the inclined leg 3 and the cap beam 4 above the pier body 2 in segments to complete the pouring of the entire TY pier.

[0116] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for controlling the heat of hydration during the casting of TY piers, characterized in that, Includes the following steps: S100. Determine the position of the pier body (2) on the pile cap (1) and the dimensions of the bottom of the pier body (2). Open a connecting groove downward along the bottom outline of the pier body (2) on the surface of the pile cap (1) and clean it. S200. A first steel barrel (24) is set at the center of the connecting groove, and the lower half of a second steel barrel (25) is set on both sides of the first steel barrel (24) and fixed thereon; S300. According to the design dimensions of TY pier, formwork is erected for part of the pier body (2), and the pier body (2) is poured in sections until it is flush with the top of the first steel barrel (24); S400. Take out the lower half of the first steel barrel (24) and the second steel barrel (25), and pour the first steel barrel (24) and the lower half of the second steel barrel (25) in the original position in the pier body (2) to form the lower half of the first post-cast section (22) and the second post-cast section (23); S500. Set the upper half of the second steel barrel (25) on the plane of the already poured part, continue to support the part above the first steel barrel (24) and pour the pier body (2) in sections until it is flush with the top of the second steel barrel (25). S600, Take out the second steel barrel (25), and pour the second steel barrel (25) in its original position in the pier body (2) to form the upper half of the second post-cast section (23); S700, the inclined leg (3) and cap beam (4) above the pier body (2) are poured in sections in sequence to complete the pouring of the entire TY pier; In step S200, the first steel barrel (24) located at the bottom of the pier (2) is shorter than the second steel barrels (25) on both sides. After the erection is completed, the top of the two is pre-fixed. The second steel barrels (25) on both sides are tilted towards the middle to control the distance between them and the boundary of the pier (2) and to avoid the boundary of the pier (2) being too thin, which would cause quality problems during the pouring process. Step S200 specifically includes the following steps: S201. Set the first steel barrel (24) vertically to ensure that its bottom surface is in close contact with the center of the connecting groove; S202. According to the dimensions of the pier body (2), determine the degree of inclination of the second steel barrel (25), and set the bottom of the second steel barrel (25) as an inclined opening according to the degree of inclination; S203. The lower half of the two second steel barrels (25) are symmetrically inclined towards the middle relative to the first steel barrel (24) to ensure that their bottom surface is in close contact with the bottom surface of the connecting groove. S204. A steel frame is erected on the top of the lower half of the first steel barrel (24) and the second steel barrel (25) to temporarily fix them; S205. The surface of the connecting groove, except for the positions where the first steel barrel (24) and the second steel barrel (25) are installed, is roughened and anchoring steel bars are installed.

2. The method for controlling the heat of hydration in the casting of TY piers according to claim 1, characterized in that, In step S300, in order to facilitate heat dissipation of the pier body (2) during the pouring process, the pouring is carried out in sections. The specific operation is as follows: S301. Complete the binding of steel bars and the erection of the bottom formwork according to the design dimensions of the first-cast section of the pier body (2). When binding the steel bars, connect them with the anchoring steel bars in the connecting groove. S302, after pouring the bottom layer of concrete for the pier body (2), vibrating and curing it, then supporting the formwork upwards; S303. Repeat step S302 until the concrete is poured to the same level as the top of the first steel barrel (24), then remove the formwork.

3. The method for controlling the heat of hydration in the casting of TY piers according to claim 2, characterized in that, In step S302, after the bottom of the pier (2) is poured to a reliable height, ensure that the lower half of the first steel barrel (24) and the second steel barrel (25) will not tilt again, and remove the fixed supports of the two to avoid the supports affecting the subsequent pouring.

4. The method for controlling the heat of hydration in the casting of TY piers according to claim 1, characterized in that, In steps S400 and S600, the method for pulling the second steel barrel (25) out of the pre-cast section (21) is as follows: a support is set at one end of the pre-cast section (21), the support is fixedly connected to the exposed steel bars on the pre-cast section (21), and a pulley is set on the support; the position of the pulley is set on the extension line of the axis of the second steel barrel (25), the steel cable of the crane passes around the pulley and connects to the inside of the second steel barrel (25), and the second steel barrel (25) is pulled out of the pre-cast section (21) along its axis by the crane.

5. The method for controlling the heat of hydration in the casting of TY piers according to claim 4, characterized in that, A temporary support structure is set at the opening where the second steel barrel (25) is pulled out. The bottom of the temporary support structure is fixed with a fulcrum, and a support plate that rotates around the fulcrum is set on the fulcrum. The support plate and the bracket of the pre-cast section (21) are equipped with a buffer assembly so that the second steel barrel (25) falls on the support plate after being pulled out. Then, the lifting point of the second steel barrel (25) is adjusted to lift it down from the pre-cast section (21).

6. The method for controlling the heat of hydration in the casting of TY piers according to claim 1, characterized in that, The first steel barrel (24) and the second steel barrel (25) are both hollow cylindrical structures made of steel with good thermal conductivity. They are composed of two semi-circular cylindrical surfaces with smooth outer surfaces. Connecting plates are provided on the inner side of the two connecting surfaces. The connecting plates on the two cylindrical surfaces are connected by bolts to splice them into a cylindrical shape.

7. The method for controlling the heat of hydration in the casting of TY piers according to claim 1, characterized in that, The first steel barrel (24) is a hollow cylindrical structure made of steel with good thermal conductivity. It is divided into at least three cylindrical surfaces, including at least one pre-disassembled cylindrical surface (241) and multiple post-disassembled cylindrical surfaces (242). The two sides of the pre-disassembled cylindrical surface (241) are connected to the post-disassembled cylindrical surface (242) by beveled openings, and the openings of the beveled openings on both sides face the central axis. The connection between the pre-disassembled cylindrical surface (241) and the post-disassembled cylindrical surface (242) is also provided with a connecting plate (243) facing inward. The pre-disassembled cylindrical surface (241) and the post-disassembled cylindrical surface (242) are connected by bolts to form a complete cylindrical structure through the connecting plate (243). When removing it from the pre-cast section (21), remove the bolts between the first-removed column surface (241) and the second-removed column surface (242). After the removal is completed, knock the first-removed column surface (241) to separate it from the pre-cast section (21) into the first steel cylinder (24). After the separation is completed, lift it out. Then lift the second-removed column surface (242) out in the same way. The second steel barrel (25) has the same structural composition as the first steel barrel (24).

8. A TY pier casting system for controlling the heat of hydration, used to implement the TY pier casting method for controlling the heat of hydration as described in any one of claims 1-7, characterized in that, include: Cleaning module: used to determine the position of the pier body (2) on the pile cap (1) and the dimensions of the bottom of the pier body (2), to open a connecting groove downward along the bottom outline of the pier body (2) on the surface of the pile cap (1), and to clean it; Steel barrel fixing module: used to set the first steel barrel (24) in the center of the connecting groove, set the lower half of the second steel barrel (25) on both sides of the first steel barrel (24), and fix it; First casting module: used to support the formwork of the pier body (2) according to the design dimensions of the TY pier, and to cast the pier body (2) in sections until it is flush with the top of the first steel barrel (24); Second casting module: used to remove the lower half of the first steel barrel (24) and the second steel barrel (25), and to cast the lower half of the first steel barrel (24) and the second steel barrel (25) in their original positions in the pier body (2) to form the lower half of the first post-cast section (22) and the second post-cast section (23); The third casting module is used to set up the second steel barrel (25) again on the plane of the already cast part, continue to support the part above the first steel barrel (24), and cast the pier body (2) in sections until it is flush with the top of the second steel barrel (25); The fourth casting module is used to remove the second steel barrel (25) and cast it in the original position of the second steel barrel (2) in the pier body (2) to form the upper half of the second post-cast section (23); The fifth pouring module is used to pour the inclined leg (3) and cap beam (4) above the pier body (2) in sections to complete the pouring of the entire TY pier.

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