Modular foundation structure of vertical rolling mill and construction method

Abstract

The invention provides a vertical rolling mill modular foundation structure and a construction method, the vertical rolling mill modular foundation structure is installed on a platform foundation and comprises a plurality of modules, a parting is formed between every two adjacent modules, a plurality of anti-shear grooves are formed in the parting interface at intervals, and each module is provided with a tensioning hole channel in a penetrating mode; the corresponding tensioning hole channels of the adjacent modules can be communicated with one another, the platform foundation is connected with the corresponding modules through anchor bars to form bottom gaps, and the bottom gaps, the parting seams and the anti-shear grooves can form filling cavities. The invention provides a construction method of a modular foundation structure of a vertical rolling mill, which comprises the following steps of: aligning and splicing a plurality of modules, and injecting a grouting material into a filling cavity; and after the grouting material reaches the preset strength, steel strands are arranged in the corresponding tensioning hole channels in a penetrating mode so that prestress tensioning can be conducted. The rolling mill foundation embedded part has the beneficial effects that through a prefabricated modular construction mode, hoisting in a limited environment is facilitated, construction waste is reduced, the position precision of the rolling mill foundation embedded part is guaranteed, the construction efficiency is improved, and the construction quality is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and particularly relates to a modular foundation structure and construction method for a vertical rolling mill. Background Art

[0002] In the existing technology, as the main core rolling equipment, the vertical rolling mill has the characteristics of a long construction period and being restricted by the site. The vertical rolling mill is often installed on the embedded parts or bolts of the concrete foundation after pouring to ensure firm fixation. Since the vertical rolling mill has high precision requirements, it is required that the installation precision of the embedded parts or bolts of the rolling mill foundation is also very high, and it needs to be repeatedly checked and calibrated, which seriously restricts the construction period. On the other hand, usually, the bolts of the vertical rolling mill foundation are installed and fixed through the constructed bolt brackets, and measures such as hanging steel wires, plumb bobs and theodolites are used. When deviations are found, hammers or self-made steel bar crowbars are used to adjust the bolts and embedded parts to ensure the accuracy of flatness and perpendicularity. After the adjustment is completed, after the steel binding bars and formwork of the rolling mill foundation are completed, the accuracy of the bolts and embedded parts needs to be checked again, and then concrete is poured to form the rolling mill foundation. The checking and adjustment efficiency of the embedded parts or bolts is low, the construction process is cumbersome, and a large amount of formwork or square wood waste is generated during the adjustment process. The construction period of the rolling mill foundation is long; also, due to the high height of the vertical rolling mill, it is extremely difficult to check and adjust the embedded parts and bolts on the side of the rolling mill foundation. The height of the bolts and embedded parts on the top surface of the rolling mill foundation is relatively high, the measurement and setting out are difficult, and the labor cost is high. There are technical problems such as the large size of the vertical rolling mill, the limited construction site and the high installation precision requirements, resulting in the need for repeated checking and adjustment during the construction process of the embedded parts or bolts of the rolling mill foundation, the large construction difficulty, long construction period, low efficiency of the rolling mill foundation, and easy generation of a large amount of waste. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a modular foundation structure and construction method for a vertical rolling mill, which is particularly suitable for quickly constructing the foundation of a vertical rolling mill under limited environmental conditions and ensuring the structural quality of the rolling mill foundation and the installation accuracy of the embedded parts and bolts.

[0004] The technical solution adopted by the present invention is: a modular foundation structure for a vertical rolling mill, which is installed on a platform foundation, includes a plurality of modules spliced with each other. A joint is formed between adjacent modules, and a plurality of shear keys are arranged at intervals at the joint interface. Each module is provided with a tensioning duct passing through, and the corresponding tensioning ducts of adjacent modules can be communicated with each other. The platform foundation is connected to the corresponding module through anchor bars, and a bottom gap is formed between the platform foundation and the corresponding module. The bottom gap, each joint and the shear keys can form a filling cavity.

[0005] Further, the shear keys provided between adjacent modules can correspond to each other and be communicated.

[0006] Furthermore, embedded steel bars are provided in each shear slot and the steel bars are exposed on the side walls of the shear slot. When adjacent modules are spliced, the steel bars located at the same joint are inserted into the corresponding shear slots in an interleaved manner.

[0007] Furthermore, each module is provided with a lifting ring for hoisting.

[0008] Furthermore, the module corresponding to the platform foundation is provided with plug holes for inserting anchor bars.

[0009] Furthermore, a plurality of tensioning ducts are arranged longitudinally and transversely in each module to form a grid-shaped prestressed duct.

[0010] Furthermore, the number of modules is not less than four, and the multiple modules are divided into an upper module group and a lower module group that can correspond to each other.

[0011] Furthermore, the present invention also provides a construction method for the modular foundation structure of a vertical rolling mill, including the following steps:

[0012] Hoist a plurality of modules in sequence by a hoisting device;

[0013] Inject grouting material into the corresponding joints, shear slots and bottom gaps;

[0014] After the grouting material reaches the preset strength, pass steel strands through the corresponding tensioning ducts for prestress tensioning, and perform anchor sealing after the tensioning is completed.

[0015] Furthermore, hoisting a plurality of modules in sequence by a hoisting device includes: connecting the platform foundation to the corresponding module through a backing plate to form a bottom gap.

[0016] Furthermore, the module is precast from concrete.

[0017] The advantages and positive effects of the present invention are: Due to the adoption of the above technical solution, by prefabricating the modular rolling mill foundation, it is convenient for hoisting in a restricted environment, reducing construction waste, ensuring the position accuracy of the embedded parts of the rolling mill foundation, and improving construction efficiency; it has the advantages of improving the construction efficiency of the rolling mill foundation and ensuring the construction quality of the rolling mill foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0019] Figure 2 is an enlarged schematic diagram of the joint structure of an embodiment of the present invention;

[0020] Figure 3 is a schematic structural diagram of the vertical shear slot of an embodiment of the present invention;

[0021] Figure 4It is a schematic structural diagram of a transverse shear slot in an embodiment of the present invention;

[0022] Figure 5 It is a schematic structural diagram of a bottom clearance amplification in an embodiment of the present invention;

[0023] Figure 6 It is a schematic construction scene diagram of an embodiment of the present invention;

[0024] In the figure:

[0025] 1, vertical joint; 2, horizontal joint; 3, shear slot

[0026] 4, insertion hole; 5, vertical tension duct; 6, horizontal tension duct

[0027] 7, anchor sealing device; 8, lifting ring; 9, bottom clearance Specific embodiments

[0028] The following describes the embodiments of the present invention with reference to the accompanying drawings. The described embodiments are only a part of the embodiments of the invention, rather than all of the embodiments.

[0029] The following details the embodiments of the present invention. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals represent the same or similar units or units with the same or similar functions throughout.

[0030] The embodiments described by referring to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as a limitation to the present invention. In the description of the present invention, it should be understood that terms such as "installation", "connection", "fixation" should be understood in a broad sense, which can be direct connection, installation or fixation, or indirect connection, installation or fixation. The present invention does not limit this.

[0031] Such as Figures 1 to 6As shown in the figure, it is a schematic diagram of an embodiment of a modular foundation structure of a vertical rolling mill according to the present invention. The modular foundation structure of the vertical rolling mill is installed on a platform foundation. The foundation structure of the vertical rolling mill includes a plurality of modules spliced together. A slit is formed between adjacent modules, and a plurality of shear keys 3 are arranged at intervals at the slit interface. Each module is provided with a tensioning duct running through it, and the corresponding tensioning ducts of adjacent modules can be interconnected. The platform foundation is connected to the corresponding module through anchor bars, and a bottom gap 9 is formed between the platform foundation and the corresponding module. The bottom gap 9, each slit and the shear key 3 can form a filling cavity for pouring slurry to connect. In this embodiment, through a plurality of prefabricated modules, it can not only meet the hoisting load-bearing range during construction in a restricted space, but also arrange the modules of the prefabricated vertical rolling mill foundation synchronously before or during the construction of the platform foundation. Preferably, shear keys 3 with a size of 250mm×250mm - 350mm×350mm are reserved every 1000mm on the joint surface of adjacent modules, and the depth of the shear key 3 is 200mm. The integrity and shear resistance of the foundation structure can be improved through the shear key 3.

[0032] In this embodiment, the shear keys 3 provided between adjacent modules can correspond to each other to form a connected cavity. Concrete can be filled in the cavity to improve the shear resistance of the foundation structure and ensure the integrity of the combination of multiple modules.

[0033] In this embodiment, steel bars are embedded in each shear key 3 and the steel bars are exposed on the side wall of the shear key 3. When adjacent modules are spliced, the steel bars located in the same slit are inserted into the corresponding shear key 3 in an interlaced manner to form a steel bar interlaced structure. Through the steel bars arranged in an interlaced manner in the shear key 3, the shear strength of the slit can be improved. After the grouting material injected into the shear key 3 reaches the preset strength, the grouting material hardens to form a composite bond with the steel bars and the side wall of the shear key 3, avoiding the weak joint surface of the traditional slit, improving the uniformity of the stiffness distribution of the foundation structure, and better ensuring the construction quality.

[0034] In this embodiment, each module is provided with a temporary lifting ring 8 for hoisting to better improve the hoisting efficiency.

[0035] In this embodiment, insertion holes 4 are opened at the bottom of the module corresponding to the platform foundation, and the insertion holes 4 are used for inserting the anchor bars embedded in the platform foundation.

[0036] Each module is provided with a plurality of tensioning ducts arranged longitudinally and / or transversely. Preferably, each module is provided with a plurality of tensioning ducts arranged both longitudinally and transversely. The vertical tensioning ducts 5 and the horizontal tensioning ducts 6 form a grid-shaped prestressed channel.

[0037] The number of modules is not less than four, and the multiple modules are divided into an upper module group and a lower module group that can correspond to each other. Preferably, the number of modules is four, of which two modules constitute the upper module group and two modules constitute the lower module group. Vertical seams 1 and transverse seams 2 that crisscross each other are formed between adjacent modules. The vertical seam 1 divides the vertical rolling mill foundation structure into two parts longitudinally, and the transverse seam 2 divides the vertical rolling mill foundation into two parts transversely. The bottom of the module in the lower module group is provided with a plug-in hole 4 corresponding to the platform foundation anchor bar. Each module can meet the crane hoisting load range of the workshop building.

[0038] On the other hand, the present invention also provides a construction method of a modular infrastructure of a vertical rolling mill, comprising the following steps:

[0039] During module prefabrication, the design drawings are studied in depth for a second time and a three-dimensional model is established. During preparation, the steel bars are tied in advance, bolts and embedded parts are directly buried, and corresponding holes and notches are reserved. After all the work is completed, the position and elevation of the embedded parts and bolts are checked to ensure the accuracy of the embedded parts and bolts.

[0040] When pouring the platform foundation, anchor bars are reserved for connecting the vertical rolling mill foundation structure.

[0041] After prefabrication, the basic structure is installed, and multiple modules are transported to the predetermined lifting position of the on-site crane. Multiple modules are lifted in sequence by the lifting equipment. Specifically, during lifting, the crane hook wire rope is hung on the corresponding lifting ring 8. In this embodiment, the corresponding modules of the lower module group are first installed on the platform foundation in sequence by the lifting equipment, and the plug hole 4 is aligned with the platform foundation anchor bar. The platform foundation is connected to the corresponding module through the pad to form a bottom gap 9. The bottom gap 9 is used to form an 80mm bottom grouting layer. The pad can also adjust the elevation of the lower module group. After the installation of the lower module group, the axis and elevation are fine-tuned; then the corresponding modules of the upper module group are lifted in sequence to splice them with the adjacent modules and ensure that the shear grooves 3 between the adjacent modules are aligned with each other. After the installation of the upper module group, the position is also fine-tuned and checked. Finally, the bolts and embedded parts pre-buried in the module are re-measured for the axis and elevation as a whole.

[0042] When the modular foundation structure of the vertical rolling mill is installed and the axis position and elevation of the bolts and buried wires are checked, grouting material is injected into the bottom gap 9, the insertion channel 4 for inserting anchor bars, the corresponding transverse joints 2 and shear grooves 3, and the corresponding vertical joints 1 and shear grooves 3 as a whole to form an integrated foundation structure.

[0043] After the grouting material reaches the preset strength, recheck the axial position and elevation of the bolts and embedded parts, and then thread the steel strands into the corresponding tensioning ducts for prestress tensioning. After the tensioning is completed, seal the anchor through the anchor-sealing device 7. During prestress tensioning, the one-end tensioning method can be adopted. The tensioning ends of multiple vertical modules are above the corresponding module foundations, and the tensioning ends of multiple horizontal modules can be flexibly selected according to the construction site.

[0044] The present invention can solve the problem of difficult transportation during the construction of the traditional vertical rolling mill foundation, and can also reduce the situation of repeatedly adjusting the embedded parts or bolts. The prefabricated modular foundation structure can ensure rapid hoisting in a restricted environment. At the same time, it optimizes the construction process, saves labor costs, reduces construction waste such as formwork and wooden squares, and reduces the problem of poor stability of the rolling mill foundation structure due to insufficient shear resistance. Shear grooves 3 are provided at the joints and combined with steel bars and tensioning ducts to form a multiple shear resistance system. By filling the grouting material and applying prestress, the integrity and anti-deformation ability of the vertical rolling mill foundation structure are improved.

[0045] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiments of the present invention and cannot be considered as limiting the scope of implementation of the present invention. All equivalent changes and improvements made according to the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A modular foundation structure for a vertical rolling mill, which is installed on a platform foundation, is characterized in that: It includes multiple spliced modules. There are seams formed between adjacent modules, and multiple shear-resistant grooves are arranged at intervals at the interface of the seams. Each module is provided with tensioning ducts running through it. The corresponding tensioning ducts of adjacent modules can communicate with each other. The platform foundation is connected to the corresponding module through anchor bars, and a bottom gap is formed between the platform foundation and the corresponding module. The bottom gap, each seam, and the shear-resistant grooves can form a filling cavity.

2. The modular foundation structure of the vertical rolling mill according to claim 1, characterized in that: The shear-resistant grooves provided between adjacent modules can correspond to each other to communicate.

3. The modular foundation structure of the vertical rolling mill according to claim 2, characterized in that: Reinforcing bars are embedded in each shear-resistant groove, and the reinforcing bars are exposed on the side walls of the shear-resistant grooves. When adjacent modules are spliced, the reinforcing bars located in the same seam are inserted into the corresponding shear-resistant grooves in an interlaced manner.

4. The modular basic structure of the vertical rolling mill according to any one of claims 1-3, characterized in that: Each module is provided with lifting rings for hoisting.

5. The modular basic structure of the vertical rolling mill according to any one of claims 1-3, characterized in that: The module corresponding to the platform foundation is provided with insertion holes for inserting the anchor bars.

6. The modular basic structure of the vertical rolling mill according to any one of claims 1 to 3, characterized in that: Each module is provided with multiple tensioning ducts arranged longitudinally and transversely to form a grid-shaped prestressed channel.

7. The modular basic structure of the vertical rolling mill according to any one of claims 1 to 3, characterized in that: The number of the modules is not less than four, and multiple modules are divided into an upper module group and a lower module group that can correspond to each other.

8. A construction method for a modular foundation structure of a vertical rolling mill, including the modular foundation structure of the vertical rolling mill according to any one of claims 1-7, characterized in that, It includes the following construction steps: Hoist multiple modules in sequence by a hoisting device; Inject grouting material into the corresponding seams, shear-resistant grooves, and bottom gaps; After the grouting material reaches the preset strength, pass steel strands through the corresponding tensioning ducts for prestress tensioning, and perform anchor sealing after the tensioning is completed.

9. The construction method of the modular foundation structure of the vertical rolling mill according to claim 8, characterized in that, The hoisting of multiple modules in sequence by the hoisting device includes: The platform foundation is connected to the corresponding module through a backing plate to form a bottom gap.

10. The construction method of the modular foundation structure of the vertical rolling mill according to claim 8, characterized in that: The module is precast with concrete.

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