Method for steel column of metallurgical technical transformation workshop to pass through multi-floor slab under wet soft ground

Abstract

The application is a method for steel column penetrating multi-floor slabs in metallurgical technical transformation plant under wet soft ground, comprising: measuring and positioning the steel column penetrating position of each floor; removing pipelines and equipment affecting installation; protecting finished pipelines and equipment in the influence range of the removal point, removing the roof of the positioning point; binding the internal steel reinforcement of the foundation, and hoisting and inserting the steel pipe pile containing pegs from the breaking position; pouring the foundation concrete of the negative first floor after the steel pipe pile installation and positioning are completed; constructing the steel column foundation of the first floor; hoisting and operating the steel column; restoring the structure of the removed part, and performing waterproof work on the first floor bottom plate and roof of the steel column penetrating position. The method for steel pipe column penetrating multi-floor slabs in metallurgical technical transformation plant under wet soft ground proposed by the application greatly reduces the technical difficulty and makes the construction more operable under the premise of ensuring the construction quality through embedding permanent steel formwork and segmented construction mode.

Description

Technical Field

[0001] This invention relates to the field of metallurgical plant renovation technology, specifically a method for steel columns to penetrate multi-story floor slabs in metallurgical technical renovation plants under wet and soft foundation conditions. Background Technology

[0002] A steel plant in a certain region expanded its original factory building due to industrial upgrading. According to the drawings, after the expansion, the steel columns of the factory building passed through the roof and first floor of the original dephosphorization pump room and were placed on the newly built foundation on the first basement level. According to the original geological survey report, the groundwater level at the construction location is approximately 0.50-1 meter deep, indicating extremely abundant groundwater. The steel column foundation pit is located in the ②2 layer of clayey silt interbedded with silty clay and the ②3-2 layer of clayey silt interbedded with silty clay, which exhibit significant thixotropic and rheological properties. Under dynamic conditions, the soil strength is easily reduced, making local collapses and soil erosion highly likely. During construction, the limited working space inside the pump house makes it difficult to guarantee the quality of the steel column foundation under these geological conditions, following the traditional construction method of laying the foundation layer, tying reinforcement bars, erecting formwork, pouring concrete, removing formwork, backfilling earthwork, and restoring the basement slab. Furthermore, there is a risk of seepage and leakage at the joint between the basement slab of the pump house and the steel column foundation after construction. The opening space in the roof and floor slabs is narrow, and hoisting the steel column through two floors and inserting it into the foundation socket presents extremely high operational technical difficulties. Summary of the Invention

[0003] The purpose of this invention is to propose a method for installing steel columns through multi-story slabs in metallurgical technical renovation projects on soft and wet foundations. This method can effectively solve the above-mentioned problems. By embedding permanent steel formwork and using a segmented construction method, the technical difficulty is greatly reduced while ensuring construction quality, making the construction more operable.

[0004] To achieve the above objectives, the present invention is implemented as follows:

[0005] A method for steel columns to penetrate multi-story floor slabs in a metallurgical technical renovation plant under wet and soft foundation conditions, including...

[0006] Step 1: Measure and locate the intersection position of the steel columns on each floor, and determine the pipelines and equipment that will affect the installation based on the location;

[0007] Step 2: Remove any pipelines and equipment that are affecting the installation, and relocate the equipment and reroute the pipelines to restore the installation.

[0008] Step 3: Protect the finished pipelines and equipment within the affected area of ​​the demolition point, demolish the roof and first floor slab at the location point, break the basement floor slab according to the new foundation area, excavate the foundation pit and do a good job of drainage of the excavated foundation pit, and clean up the demolition waste and excavated soil.

[0009] Step 4, tie the internal base steel bars together with the basement floor steel bars, and hoist and insert the steel pipe pile containing the pegs from the breaking position, with the steel pipe pile being away from the bottom of the base steel formwork and the top being higher than the top plate of the floor above;

[0010] Step 5, after the positioning of the steel pipe pile is completed, the foundation concrete of the floor below zero is poured;

[0011] Step 6, construction of the first floor steel column foundation;

[0012] Step 7, steel column hoisting operation; after the steel column is installed and adjusted in place, cup mouth secondary grouting operation is performed, and the safety protection measures can be removed after the grouting strength reaches the requirement;

[0013] Step 8, restore the structure of the removed part, and do the waterproof work of the first floor bottom plate and the roof at the steel column insertion position.

[0014] The method for the steel column of the metallurgical technical transformation plant to penetrate through the multi-floor slabs in the wet and soft foundation, in step 4, a rectangular steel formwork with an upper opening of 2.0 thick steel plate corresponding to the size of the excavated foundation is installed to isolate the internal water of the foundation pit, after the installation of the steel formwork, the internal base steel bars are tied, the steel bars are connected with the basement floor steel bars, and the steel pipe pile containing the pegs is hoisted and inserted at the center position of the cross section of the floor below zero from the breaking position, with the steel pipe pile being away from the bottom of the base steel formwork and the top being higher than the top plate of the floor above.

[0015] The method for the steel column of the metallurgical technical transformation plant to penetrate through the multi-floor slabs in the wet and soft foundation, in step 7, a 300t crawler crane is used for hoisting the steel column, and special personnel are arranged on the roof and the first floor to command the hoisting operation of the steel column, so that the steel column is accurately installed and positioned, the suspension operation time is reduced, and cup mouth secondary grouting operation is performed after the steel column is installed and adjusted in place, and the safety protection measures can be removed after the grouting strength reaches the requirement.

[0016] The method for the steel column of the metallurgical technical transformation plant to penetrate through the multi-floor slabs in the wet and soft foundation, in step 5, after the positioning of the steel pipe pile is completed, the foundation concrete of the floor below zero is poured, and the concrete is poured into the inner cavity of the steel pipe column at the first floor, and automatically slides into the foundation below zero, and the inner cavity concrete pouring work of the steel pipe column is performed after the initial setting of the foundation below zero, and the top is reserved for pouring the foundation of the first floor.

[0017] The method for the steel column of the metallurgical technical transformation plant to penetrate through the multi-floor slabs in the wet and soft foundation, in step 6, during the construction of the first floor steel column foundation, the anchoring bars are first installed in the cavity of the steel pipe pile, then the foundation steel bars are installed, the formwork is installed, and finally the concrete is poured, and the steel column hoisting work is performed after the strength of the concrete reaches the design requirement.

[0018] The method for installing steel pipe columns through multi-story slabs in metallurgical technical renovation projects on wet and soft foundations proposed in this invention greatly reduces technical difficulty and makes construction more operable while ensuring construction quality by embedding permanent steel formwork and using segmented construction methods. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the location of the steel column.

[0020] Figure 2 This is a schematic diagram of the cross-section of the steel column installation. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection claimed in this application.

[0022] like Figure 1 , Figure 2 A method for steel columns to penetrate multi-story floor slabs in a metallurgical technical renovation plant under wet and soft foundation conditions, including...

[0023] Step 1: Measure and locate the intersection position of the steel columns on each floor, and determine the pipelines and equipment that will affect the installation based on the location;

[0024] Step 2: Remove any pipelines and equipment that are affecting the installation, and relocate the equipment and reroute the pipelines to restore the installation.

[0025] Step 3: Protect the finished pipelines and equipment within the affected area of ​​the demolition point, demolish the roof and first floor slab at the location point, break the basement floor slab according to the new foundation area, excavate the foundation pit and do a good job of drainage of the excavated foundation pit, and clean up the demolition waste and excavated soil.

[0026] Step 4: Tie the foundation steel bars inside the excavated foundation pit, connect the steel bars to the basement floor slab steel bars, and hoist and insert the steel pipe piles with internal studs from the breaking position. The steel pipe piles are located between the bottom of the foundation steel formwork and the top is one floor higher than the top slab.

[0027] Step 5: After the steel pipe piles are installed and positioned, pour the foundation concrete for the first basement level.

[0028] Step 6: Construct the first-floor steel column foundation;

[0029] Step 7: Steel column hoisting operation; After the steel column is installed and adjusted into place, a second grouting operation is carried out at the grouting cup. The safety protection measures can only be removed after the grouting strength reaches the required level.

[0030] Step 8, restore the structure of the demolition site, and do the steel column insertion position one layer bottom plate and roof waterproof work.

[0031] The method for the steel column to penetrate the multi-layer floor of the metallurgical technical transformation plant in the wet soft foundation, in step 4, a rectangular steel mold with a 2.0 thick steel plate surrounding the upper opening corresponding to the size of the excavated foundation is installed at the excavated foundation position, which is used to isolate the water in the foundation pit, after the installation of the steel mold, the internal foundation steel bars are bound, the steel bars are connected with the basement floor steel bars, and the steel pipe pile containing the dowel is hoisted and inserted at the center position of the cross section of the negative one layer steel mold from the breaking position, the distance between the steel pipe pile and the bottom of the foundation steel mold plate is the top of the first floor.

[0032] The method for the steel column to penetrate the multi-layer floor of the metallurgical technical transformation plant in the wet soft foundation, in step 7, a 300t crawler crane is used for hoisting the steel column, and special personnel are arranged on the roof and the first floor to command the hoisting of the steel column, so that the steel column is accurately installed and positioned, the suspension operation time is reduced, and after the steel column is installed and adjusted in place, the cup mouth secondary grouting operation is carried out, and after the grouting strength reaches the requirement, the safety protection measures can be removed.

[0033] The method for the steel column to penetrate the multi-layer floor of the metallurgical technical transformation plant in the wet soft foundation, in step 5, after the steel pipe pile is installed and positioned, the negative one layer foundation concrete is poured, and when pouring, the concrete is poured into the cavity of the steel pipe column at the first floor, and automatically slides into the negative one layer foundation, and after the negative one layer foundation is poured and initial setting, the concrete pouring work in the cavity of the steel pipe column is carried out, and when pouring, the top reserved with the first layer steel column foundation is poured together.

[0034] The method for the steel column to penetrate the multi-layer floor of the metallurgical technical transformation plant in the wet soft foundation, in step 6, the first floor steel column foundation construction is constructed, the anchoring steel is installed in the cavity of the steel pipe pile, the foundation steel is constructed, the formwork is installed, and finally the concrete is poured, and after the strength of the concrete reaches the design requirement, the steel column hoisting work is carried out.

[0035] The above is only an embodiment provided by the present application, and is not used to limit the present application, although the present application is described in detail with reference to the embodiment, for those skilled in the art, the technical solutions recorded in the foregoing embodiment can be modified, or some technical features can be replaced, but any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A method for steel columns to penetrate multi-story floor slabs in a metallurgical technical renovation plant under wet and soft foundation conditions, characterized by: Comprising Step 1, measure the position of each layer of steel column, according to the position to determine the installation of the pipeline, equipment; Step 2, the pipeline, equipment is removed, and the equipment is moved, the pipeline is recovered; Step 3, do a good job of pipeline, equipment protection work in the influence range of the demolition point, demolish the roof and the first floor slab, break the basement floor according to the range of the new foundation, excavate the foundation pit and do a good job of drainage work, at the same time, clean up the broken building garbage and excavated earthwork; Step 4, tie the foundation steel inside the excavated foundation pit, connect the steel with the basement floor steel together, and hoist and insert the steel pipe pile containing nails in the broken position, the bottom of the steel pipe pile is a certain distance from the bottom of the foundation steel formwork, and the top of the steel pipe pile is a certain distance from the top plate of the first floor; Step 5, after the steel pipe pile installation positioning is completed, the negative one layer foundation concrete is poured; Step 6, construction of the first layer of steel column foundation; Step 7, steel column hoisting operation; after the steel column is installed and adjusted in place, the cup mouth secondary grouting operation is carried out, and the safety protection measures can be removed after the grouting strength reaches the requirement; Step 8, restore the structure of the demolished part, and do a good job of waterproofing work on the first floor and the roof of the steel column insertion position; Its characteristics are: In step 4, a 2.0 thick steel plate with an upper opening corresponding to the size of the excavated foundation is installed to form a rectangular steel form for isolating the water in the foundation pit, the foundation steel is tied inside the steel form after installation, the steel is connected with the basement floor steel together, and the steel pipe pile containing nails is hoisted and inserted at the center position of the negative one layer steel form cross section from the broken position, the bottom of the steel pipe pile is a certain distance from the bottom of the foundation steel formwork, and the top of the steel pipe pile is a certain distance from the top plate of the first floor; In step 5, after the steel pipe pile installation positioning is completed, the negative one layer foundation concrete is poured, the concrete is poured into the cavity of the steel pipe column from the first floor, and automatically slides into the negative one layer foundation, the concrete pouring work in the cavity of the steel pipe column is carried out after the negative one layer foundation is poured and initial setting, and the top is reserved a certain height and poured together with the first layer of steel column foundation during pouring; In step 6, during the construction of the first layer of steel column foundation, anchor bars are installed in the cavity of the steel pipe pile, then the foundation steel is installed, the formwork is installed, and finally the concrete is poured, and the steel column hoisting work is carried out after the strength of the concrete reaches the design requirement.

2. The method according to claim 1, wherein the method is characterized by: In step 7, the 300t crawler crane is used for hoisting the steel column, and the steel column is accurately installed and positioned by arranging special personnel to command on the roof and the first floor during hoisting operation, so as to reduce the suspension operation time, and then the cup mouth secondary grouting operation is carried out after the steel column is installed and adjusted in place, and the safety protection measures can be removed after the grouting strength reaches the requirement.

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