Construction method of double-layer polygonal separation chamber lattice support

Abstract

The present invention relates to a construction method of a double-layer polygonal separation chamber lattice support, wherein the double-layer polygonal separation chamber lattice support includes a double-layer component and a single-layer component in the height direction. First, the column base plate is installed and the double-layer components are installed in pairs; the inner ring steel pipe column and the outer ring steel pipe column in the double-layer component are respectively connected to the column base plate. Before hoisting the upper part of the separation chamber equipment, the hoisting device used for the construction of the separation chamber support is installed on the top of the upper part of the separation chamber equipment, and the single-layer component is hoisted into place by the hoisting device on the top of the upper part of the separation chamber equipment. The present invention realizes the simple construction of the double-layer polygonal separation chamber lattice support through the method of grouping and pairing, and uses the hoisting device on the top of the upper part of the separation chamber equipment to hoist the single-layer component into place, thereby ensuring the smooth construction and construction quality of the separation chamber support, reducing construction time and cost, and reducing construction safety risks.

Description

Technical Field

[0001] The invention belongs to the technical field of chemical equipment installation, and in particular relates to a construction method of a lattice support for a separation chamber of a natural alkali plant. Background Art

[0002] In the natural alkali project, the separated type is installed in the separated bracket. Taking a natural alkali project as an example, the separation chamber bracket is designed as a dodecagonal lattice bracket, with an inner circle circumscribed circle diameter of 12m and an outer circle circumscribed circle diameter of 16.2m. The bracket elevation section of +0.350 to +23.000m is a double-layer polygonal lattice bracket, and the elevation section of +23.000 to +41.900m is a single-layer polygonal lattice bracket, with a total height of 41.9m. The bracket is mainly composed of steel pipe columns (non-shrinkage concrete is poured inside the steel pipe columns), steel beams, steel pipe inclined supports, platform railings, etc., and the steel components are prefabricated in the processing plant.

[0003] At present, in the construction of similar projects, the inner circle columns, outer circle columns, and the inclined supports between the inner and outer columns are often prefabricated in segments and pieces on the ground and then hoisted as a whole, and then the inclined supports between two adjacent pieces are installed.

[0004] Under this circumstance, the traditional construction method has many disadvantages, such as more high-altitude operations, difficult installation precision control, large investment in lifting machinery and construction personnel, long construction period, and cumbersome high-altitude operations. How to adopt improved and better construction methods is particularly important to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a construction method for a double-layer polygonal separated lattice support to improve its construction efficiency and construction safety.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a construction method of a double-layer polygonal separation chamber lattice bracket, wherein the double-layer polygonal separation chamber lattice bracket includes a double-layer component and a single-layer component in the height direction; the construction method comprises the following steps:

[0007] Step 1: Install the column base plate;

[0008] Step 2: assembling and installing the double-layer components;

[0009] The double-layer component is composed of an inner layer component and an outer layer component, wherein the inner layer component includes a plurality of inner ring steel pipe columns arranged at intervals, and steel cross beams and oblique supports are installed and connected between the inner ring steel pipe columns; the outer layer component includes a plurality of outer ring steel pipe columns arranged at intervals, and steel cross beams and oblique supports are installed and connected between the outer ring steel pipe columns; the inner ring steel pipe columns and the outer ring steel pipe columns are respectively connected to the column bottom plate;

[0010] Step 3: Installation of lifting equipment for the separation chamber and installation of lifting equipment for the construction of the separation chamber support;

[0011] The separation chamber equipment is divided into two sections, the upper and lower sections, which are hoisted in place respectively. The middle part of the lower section of the separation chamber equipment is installed on the top of the inner ring steel pipe column at the top of the double-layer component. Before the upper section of the separation chamber equipment is hoisted, the hoisting tool used for the construction of the separation chamber bracket is installed on the top of the upper section of the separation chamber equipment, a hoisting basket is arranged inside the hoisting tool, and a hook hoisting component is arranged outside the hoisting tool.

[0012] Step 4: single-layer component assembly and installation;

[0013] The single-layer component is formed by a plurality of steel pipe columns arranged at intervals, and steel beams and oblique supports are connected between the steel pipe columns; the single-layer component is hoisted into place by a hoist on the top of the upper section of the separation chamber equipment.

[0014] Furthermore, in step one, the column base plate and the shear key are prefabricated as one piece, installed on the anchor bolts, and then a pad is added and fastened with nuts to complete the installation of the column base plate.

[0015] Furthermore, the double-layer component includes a first section bracket and a second section bracket. The first section bracket at the bottom is installed first, and then the second section bracket is installed on the upper part of the first section bracket. The first section bracket and the second section bracket are connected through the corresponding connecting plates on the inner ring steel pipe column and the outer ring steel pipe column.

[0016] Furthermore, the single-layer component includes a third-section bracket and a fourth-section bracket; the third-section bracket is installed on the upper part of the second-section bracket, and the fourth-section bracket is installed on the upper part of the third-section bracket.

[0017] Furthermore, in step two, when assembling the double-layer components, first assemble the two inner steel pipe columns, the two outer steel pipe columns and the accessories on the ground into a group of double-layer paired components, and then assemble them into multiple groups of the above-mentioned double-layer paired components according to the structural design of the double-layer components; hoist and install the assembled groups of double-layer paired components one span apart in turn, and then install the steel beams and supporting components within the reserved intervals; assemble and connect them according to the above method to form the first section of the bracket and the second section of the bracket.

[0018] Furthermore, in step 2, the accessories include column foot reinforcement plates, corbels and connecting plates; the outer ring steel pipe column and the accessories are prefabricated into one piece; and the inner ring steel pipe column and the accessories are prefabricated into one piece.

[0019] Furthermore, there are 6 groups of double-layer paired components in total.

[0020] Furthermore, shrinkage-free concrete is poured into the inner ring steel pipe columns and outer ring steel pipe columns of the first section support and the second section support that have been installed.

[0021] Compared with conventional construction methods, the construction method of the present invention realizes the simple construction of a double-layer polygonal separation chamber lattice bracket through a grouping and pairing method and utilizes a hoist on the top of the upper part of the separation chamber equipment to hoist the single-layer components into place, thereby ensuring the smooth construction and construction quality of the separation chamber bracket, reducing construction time and costs, and reducing construction safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are used to provide further explanation of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their description are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 It is a plan view of the steel pipe column in an embodiment of the present invention.

[0024] Figure 2 It is a plan view of the first group of components of the first section bracket in an embodiment of the present invention.

[0025] Figure 3 It is an elevation view of the first group of components of the first section bracket in an embodiment of the present invention.

[0026] Figure 4 It is a construction elevation view of components between various groups of parts in the embodiment of the present invention.

[0027] Figure 5 It is a construction elevation view of the upper single-layer support in an embodiment of the present invention.

[0028] In the figure, 1-bottom positioning center steel plate, 2-outer ring steel pipe column, 3-ladder, 4-steel beam, 5-corbel, 6-column bottom plate, 7-column foot reinforcement plate, 8-inner ring steel pipe column, 9-shear key, 10-anchor bolt, 11-pad, 12-oblique support, 13-rail, 14-connecting plate, 15-platform, 16-hanging basket, 17-winch, 18-component, 19-lower section of separation chamber, 20-upper section of separation chamber, 21-reinforcement ring, 22-sling, 23-hanging basket. DETAILED DESCRIPTION

[0029] In order to make those skilled in the art better understand the present invention, the present invention is further clearly and completely described below in conjunction with the accompanying drawings and embodiments. It should be noted that, in the absence of conflict, the features in the embodiments and examples of this application can be combined with each other.

[0030] A typical embodiment of the present invention provides a double-layer polygonal separation chamber lattice support, which includes a double-layer component and a single-layer component in the height direction; and its construction method includes the following steps.

[0031] Step 1: Install the column base plate 6.

[0032] First, re-measure the foundation, then install the column base plate 6 on the foundation, and finally mark the steel pipe column installation axis on the column base plate 6.

[0033] Step 2: Install the double-layer components.

[0034] The first bracket section and the second bracket section are double-layer components.

[0035] The double-layer component is composed of an inner layer component and an outer layer component, wherein the inner layer component includes a plurality of inner ring steel pipe columns 8 arranged at intervals, and steel cross beams 4 and oblique supports 12 are installed and connected between the inner ring steel pipe columns 8; the outer layer component includes a plurality of outer ring steel pipe columns 2 arranged at intervals, and steel cross beams 4 and oblique supports 12 are installed and connected between the outer ring steel pipe columns 2; the inner ring steel pipe columns 8 and the outer ring steel pipe columns 2 are respectively connected to the column base plate 6.

[0036] Specifically, when assembling the first section of the support on site, first assemble the four steel pipe columns (two inner steel pipe columns 8 and two outer steel pipe columns 2) with ladder platforms and accessories on the ground into a group, and then assemble the other steel columns and accessories into a group with one span interval, with four steel pipe columns in each group, and hoist and install the assembled structures separately. Then install the steel beams 4 and oblique supports 12 in the reserved interval, and after connecting to form a whole, check all data, and pour concrete in the steel pipe columns after they are correct. After the concrete meets the strength requirements, install the second section of the support, and the installation method is the same as the first section.

[0037] The column bottom plate 6 is prefabricated separately from the steel pipe columns (inner steel pipe column 8 and outer steel pipe column 2) in the first section of the bracket. The bottom positioning center steel plate 1 is buried at the center point of the foundation, and the center cross axis is engraved. The foundation of each steel pipe column is re-measured, the column bottom plate 6 is installed, and the positioning axis is drawn on the column bottom plate 6.

[0038] The first section of the bracket increases the depth of the on-site assembly. Every four steel pipe columns and accessories are assembled into one component, totaling six components. First, the four steel pipe columns with ladder platforms and accessories are assembled into a group on the ground. The accessories include steel beams, inclined supports, platforms 15, ladders 3, railings 13, etc., as the first group of component assembly and installation in place. After the first group of on-site assembly welding is completed, all welds are rusted and repainted, and then hoisted into place. After adjusting the installation size, the steel pipe column and the column base plate 6 are welded.

[0039] The symmetrical components of the first group are installed as the second group of components. After the two groups of components are installed, a top center positioning plate is set on the top of the components, and the center of the top center positioning plate is concentric with the center of the bottom center positioning plate. Starting from the first group of components, the third and fifth groups are on the left, and the fourth and sixth groups are on the right. The components are installed in sequence from both sides at the same time. After the installation of the six groups of components is completed, the installation dimensions are reviewed. After the review is correct, the top steel beams and platforms 15 between the first and third groups, the first and fourth groups, the third and fifth groups, the fourth and sixth groups, the second and fifth groups, and the second and sixth groups are installed respectively. A hanging basket 16 is set between the inner and outer circles under the platform 15 as an operating platform for construction personnel. A winch 17 is set on the inner side of the inner circle and the outer side of the outer circle on the platform 15 to cooperate with the lifting of the steel beams and the inclined support 12 to complete the connection and installation of the components between each group of components.

[0040] Pour shrinkage-free concrete into the first section of the installed steel pipe column, and start the second section after the strength reaches the design requirements. The prefabrication installation method of the second section is the same as that of the first section. The connecting part of the second section of the steel pipe column and the first section of the steel pipe column is connected with the connecting plate 14 bolts during installation. After verifying that the installation size meets the requirements, the first section of the steel pipe column and the second section of the steel pipe column are welded. After welding is completed, remove the positioning connecting plate 14.

[0041] Pour shrinkage-free concrete into the second section of the steel pipe column that has been installed. After the strength reaches the design requirements, install the equipment in the lower section 19 of the separation chamber. After the installation and alignment of the equipment in the lower section 19 of the separation chamber, install the upper section of the separation chamber equipment and the attached equipment platform, and set up temporary lifting equipment at the top pipe opening of the separation chamber equipment.

[0042] Step 3: Install the lifting device 22 used for lifting the separation chamber equipment and the separation chamber bracket construction;

[0043] The separation chamber equipment is divided into two sections, the upper and lower sections, which are hoisted into place respectively, wherein the middle part of the lower section of the separation chamber equipment is installed on the top of the inner ring steel pipe column 8 at the top of the double-layer component; before hoisting the upper section of the separation chamber equipment, the hoisting device used for the construction of the separation chamber bracket is installed on the top of the upper section of the separation chamber equipment, a hanging basket 23 is arranged on the inner side of the hoisting device, and a hook hoisting component is arranged on the outer side of the hoisting device.

[0044] Step 4: Install the single-layer components in pairs.

[0045] The third bracket section and the fourth bracket section are single-layer structures.

[0046] The single-layer component is formed by a plurality of steel pipe columns arranged at intervals, and steel cross beams 4 and oblique supports are connected between the steel pipe columns; the single-layer component is hoisted into place by a hoist on the top of the upper section of the separation chamber equipment.

[0047] When the third section of the bracket is prefabricated, two adjacent steel pipe columns and accessories are connected into a group, hoisted and installed as a piece, and then the steel beam 4 and the support are installed in the reserved interval. After the connection forms a whole, various data are checked. After they are correct, concrete is poured in the steel pipe column. After the concrete meets the strength requirements, the fourth section of the bracket is prefabricated in the same way as the third section.

[0048] After the third bracket is prefabricated, each component is hoisted into place in turn using the hoist 22 on the top of the separation chamber equipment, and then the steel beams and diagonal supports between each group of components are installed. The installation method of the fourth bracket is the same as that of the third bracket. After the fourth bracket is installed, all brackets are repainted.

[0049] The technical solution and technical effects claimed in the present invention are further clearly and completely described below through a relatively specific embodiment.

[0050] The separation chamber support of a company's natural soda project is designed as a dodecagonal lattice support, with an inner circumscribed circle diameter of 12m and an outer circumscribed circle diameter of 16.2m. Among them, the support elevation section from +0.350 to +23.000m is a double-layer polygonal lattice support, and the elevation section from +23.000 to +41.900m is a single-layer polygonal lattice support. The total height of the support is 41.9m. The bracket is mainly composed of welded steel pipe columns (non-shrinkage concrete is poured inside the steel pipe columns), steel beams, steel pipe inclined supports, railings 13, etc. The steel components are prefabricated in a processing plant and constructed by on-site splicing and installation. The steel pipe columns are prefabricated in four sections according to the transportation and installation conditions. The first section is +0.350~+13.200m, the second section is +13.200~+24.300m, the third section is +24.300~+33.800m, and the fourth section is +33.800~+41.900m. The separation chamber equipment is installed on the top of the inner steel pipe column at an elevation of +23.000m.

[0051] The installation process flow of the separation chamber lattice bracket described in this embodiment is: burying of bottom positioning center steel plate 1 - re-measurement of foundation - prefabrication in processing plant - on-site acceptance of components - installation of column base plate 6 - installation of double-layer components - installation of components between double-layer components - prefabrication and lifting of lifting equipment 22 for separation chamber equipment and separation chamber bracket construction - installation of single-layer components - installation of components between single-layer components - repainting - final acceptance.

[0052] like Figure 1 As shown, according to the arrangement of the steel pipe column of the separation chamber support, a bottom positioning center steel plate 1 is buried at the center of the foundation, the separation chamber support foundation is re-measured, and a positioning axis is engraved on the column bottom plate 6.

[0053] like Figure 2 and Figure 3As shown, during prefabrication, the column base plate 6 and the shear key 9 are prefabricated into one piece, installed on the anchor bolts 10, and fastened with nuts with the pad 11, and the outer ring steel pipe column 2, the column foot rib plate 7, the corbel 5, and the connecting plate 14 are prefabricated into one piece. The inner ring steel pipe column 8, the column foot rib plate 7, the corbel 5, and the connecting plate 14 are prefabricated into one piece, and the ladder 3 and the handrail 13 are prefabricated in sections. After the above components are transported to the site, the two outer ring steel pipe columns 2 and the two inner ring steel pipe columns 8 are connected into components with the steel beam 4, the ladder 3, the inclined support 12, the handrail 13, and the platform 15, and welded. At the same time, the welds are rust-removed and painted on the ground, and the components are hoisted as a whole, and then the two outer ring steel pipe columns 2 and the two inner ring steel pipe columns 8 are welded to the column base plate 6. After the components are installed, the components are aligned by the adjusting nuts on the anchor bolts.

[0054] like Figure 4 As shown, starting from the first group of double-layer pairing components, to the left are the third group of double-layer pairing components and the fifth group of double-layer pairing components, to the right are the fourth group of double-layer pairing components and the sixth group of double-layer pairing components, and the opposite side of the first group of double-layer pairing components is the second group of double-layer pairing components, for a total of 6 groups of double-layer pairing components.

[0055] The components are installed in sequence from the first group of double-layer components to both sides at the same time. After the installation of the six groups of components is completed, the installation dimensions are checked. After the verification is correct, the top steel beams 4 and platforms 15 between the first and third groups, the first and fourth groups, the third and fifth groups, the fourth and sixth groups, the second and fifth groups, and the second and sixth groups of double-layer components are installed respectively. A hanging basket 16 is set between the inner and outer circles under the platform 15 as an operating platform for construction personnel. A winch 17 is set on the inner side of the inner circle and the outer side of the outer circle on the platform to complete the hoisting of the component 18, and the connection and installation of the components 18 between each group of components are completed. The installation of the first section of the bracket is completed.

[0056] After the installation of the first section of the bracket is completed, the installation dimensions are checked. After meeting the corresponding requirements, concrete is poured in the steel pipe column. The second section of the bracket is installed in the same way. The corresponding inner ring steel pipe column 8 and outer ring steel pipe column 2 of the second section of the bracket and the first section of the bracket are fixed with connecting plates 14 respectively. After the installation dimensions of the second section of the bracket are checked and meet the corresponding requirements, the first section of the steel pipe column and the second section of the steel pipe column are welded, and the concrete pouring in the second section of the steel pipe column is completed.

[0057] After checking the installation dimensions of the second section bracket and meeting the corresponding requirements, proceed with the hoisting of the equipment in the lower section 19 of the separation chamber, and then proceed with the hoisting of the equipment in the upper section 20 of the separation chamber.

[0058] like Figure 5As shown, before hoisting the separation chamber upper section 20 equipment, the separation chamber bracket construction hoist 22 is installed on the top of the separation chamber upper section 20 equipment, through the separation chamber bracket construction hoist 22, a hanging basket 23 is set on the inner side of the hoist 22 as a construction personnel operating platform, and a hook hoisting component 18 is set on the outer side of the hoist 22 to complete the installation of the third section separation chamber bracket.

[0059] When installing the third section of the bracket, the two outer steel pipe columns 2, the steel beam 4, and the oblique support 12 are combined into one on the ground and hoisted as a whole in six pieces. The third section of the bracket and the second section of the bracket are fixed to the corresponding steel pipe columns with connecting plates 14. After the hoisting is completed, the steel beam 4 and the oblique support 12 between the two pieces are connected, and the installation dimensions are checked. After meeting the corresponding requirements, the welding between the steel pipe columns is completed.

[0060] The fourth separation chamber bracket is installed by the same construction method as the third separation chamber bracket, the top separation chamber bracket construction hanger 22 is removed, all welds are derusted and painted, and then the entire bracket is painted.

[0061] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer polygonal separation chamber lattice support construction method, characterized in that: The double-layer polygonal separation chamber lattice support comprises a double-layer component and a single-layer component in the height direction; and the construction method thereof comprises the following steps: Step 1: Install the column base plate; Step 2: assembling and installing the double-layer components; The double-layer component is composed of an inner layer component and an outer layer component, wherein the inner layer component includes a plurality of inner ring steel pipe columns arranged at intervals, and steel cross beams and oblique supports are installed and connected between the inner ring steel pipe columns; the outer layer component includes a plurality of outer ring steel pipe columns arranged at intervals, and steel cross beams and oblique supports are installed and connected between the outer ring steel pipe columns; the inner ring steel pipe columns and the outer ring steel pipe columns are respectively connected to the column bottom plate; Step 3: Installation of lifting equipment for the separation chamber and installation of lifting equipment for the construction of the separation chamber support; The separation chamber equipment is divided into two sections, the upper and lower sections, which are hoisted in place respectively. The middle part of the lower section of the separation chamber equipment is installed on the top of the inner ring steel pipe column at the top of the double-layer component. Before the upper section of the separation chamber equipment is hoisted, the hoisting tool used for the construction of the separation chamber bracket is installed on the top of the upper section of the separation chamber equipment, a hoisting basket is arranged inside the hoisting tool, and a hook hoisting component is arranged outside the hoisting tool. Step 4: single-layer component assembly and installation; The single-layer component is formed by a plurality of steel pipe columns arranged at intervals, and steel beams and oblique supports are connected between the steel pipe columns; the single-layer component is hoisted into place by a hoist on the top of the upper section of the separation chamber equipment.

2. The method according to claim 1, characterized in that: In step one, the column base plate and the shear key are prefabricated as one piece, installed on the anchor bolts, and then a pad is added and fastened with nuts to complete the installation of the column base plate.

3. The method according to claim 1 or 2, characterized in that: The double-layer component includes a first section bracket and a second section bracket. The first section bracket at the bottom is installed first, and then the second section bracket is installed on the upper part of the first section bracket. The first section bracket and the second section bracket are connected through the corresponding connecting plates on the inner ring steel pipe column and the outer ring steel pipe column.

4. The method according to claim 3, characterized in that: The single-layer component comprises a third-section bracket and a fourth-section bracket; the third-section bracket is installed on the upper part of the second-section bracket, and the fourth-section bracket is installed on the upper part of the third-section bracket.

5. The method according to claim 4, characterized in that: In step two, when assembling double-layer components, first assemble two inner steel pipe columns, two outer steel pipe columns and accessories on the ground into a group of double-layer paired components, and then assemble them into multiple groups of the above-mentioned double-layer paired components according to the structural design of the double-layer components; hoist and install each group of double-layer paired components at intervals of one span, and then install the steel beams and supporting components in the reserved intervals; assemble and connect them according to the above method to form the first section of the bracket and the second section of the bracket.

6. The method according to claim 5, characterized in that: In step 2, the accessories include column foot reinforcement plates, corbels and connecting plates; the outer ring steel pipe column and the accessories are prefabricated into one piece; the inner ring steel pipe column and the accessories are prefabricated into one piece.

7. The method according to claim 5 or 6, characterized in that: The double-layer paired components are 6 groups in total.

8. The method according to claim 7, characterized in that: The shrinkage-free concrete is poured into the inner steel pipe columns and outer steel pipe columns of the first section support and the second section support that have been installed.

Images