Improve the main measures of steel structure design and installation technology

Improve the main measures of steel structure design and installation technology

Improve the main measures of steel structure design and installation technology

First, the main measures to improve steel structure design

1. Strengthen the supervision mechanism in the design

Due to the particularity of steel structure design, it is necessary to review the design qualifications of contractors and design units before the design, check the quality of steel structure components and the ability of relevant units to make steel structure, and check the construction and installation capacity. In addition, the steel structure design has thermal properties, and the engineering department should strengthen the management and strictly review it to help the construction unit to prepare for the work. Supervise the construction and installation capacity of the building structure and the production capacity of the structural parts, and ensure that the contractor carries out the construction in strict accordance with the relevant regulations of the project construction. Only by ensuring that the design and installation qualifications meet the requirements can the steel structure design meet the requirements of the operation.

2, improve the steel structure design

Before the steel structure design, it is necessary to judge whether the design data meets the design requirements. Under normal circumstances, steel structure engineering is mainly used in multi-level, complex and large span structural design, but also used in large vibration and high temperature dense design, design needs to uphold the attitude of excellence, in order to improve the construction quality of construction projects. As an architectural design engineer, it is necessary to strictly review the design scheme of the steel structure and do a good job of building gatekeeping to ensure the smooth progress of the construction and ensure the construction time within the scheduled period. Only in this way can the quality of architectural design be further improved, to ensure the play of architectural design benefits and learning, and to improve the economy of design. The anti-corrosion design of the steel structure is part of its design, the steel structure can not be exposed in the air for a long time, and it will lead to corrosion of the steel, and the corroded steel structure used in the steel structure will make the components cut and gradually shrink, resulting in serious building quality problems. Therefore, designers should combine the actual situation, come up with better solutions for the corrosion problem of steel structure, and implement better design schemes to improve the building.

3, strengthen the steel structure design scheme layout

Steel structure has a number of structural forms, each structural form has its own structural characteristics, the design scheme should take into account the formal characteristics of steel structure. In the design process, designers need to objectively analyze the environmental conditions and actual conditions around the steel structure to determine the best design scheme. In addition, in the preparation of architectural drawings, it is necessary to use the design method of Li Xue to design the drawings and repeatedly judge the operability of the drawings. In order to ensure the accuracy of the design of the drawings, it is necessary to organize a design team and designers with rich experience to judge the drawings repeatedly and determine the operability of the drawings.

Second, steel structure installation technical points

1. Positioning measurement

According to the design data, the horizontal elevation, axis and column spacing of the foundation are remeasured. The top surface of the foundation is marked with a cross line of two axes, which is used as the positioning basis of the installation column.

2. Install the column

Steel structure plant construction

In order to eliminate the influence of the error in the manufacturing of the column length on the column elevation, before hoisting, 1m is measured downward from the upper plane of the ox leg as the section of the theoretical elevation, marked with obvious marks, and used as the benchmark for adjusting the column elevation. On the upper surface of the bottom plate of the column, mark the cross line of the vertical and horizontal axis through the center of the column, which is used as the reference for the installation and positioning of the column. When installing the cross lines on the column and on the foundation, use a level to correct the column elevation according to the theoretical elevation mark on the column, then use a cushion block to cushion the column, and tighten the anchor screws. Then use two theodolites to correct the vertical degree of the column from the two axis directions, and use double nuts to tighten the bolts after meeting the requirements. For the columns of single unstable structures, temporary protection measures can be taken with the aid of air reinforcement cables. For columns designed with intercolumn supports, you can install intercolumn supports to enhance structural stability.

3. Crane beam installation

Before the installation of the crane beam, it should be checked, and it can be installed when the deformation is not exceeded. After the single piece of the crane beam is hoisted into place, it should be bolted to the bull leg in time, and the connecting plate between the upper edge of the beam and the column should be connected, and the bolts should be tightened after meeting the requirements.

4. Roof beam installation

The roof beam should be inspected before assembling on the ground. When the deformation of the component is not excessive, the friction surface of the high-strength bolt connection is free of sand and other debris, and it is confirmed that the friction surface is smooth and dry, it can be assembled on the ground. During assembly, oil-free sleepers are used to cushion the components, and wooden bars are used to support both sides of the components to enhance stability. The assembly of the roof beam is taken as a unit between the two columns, and the unit should be inspected after splicing:

① the straightness of the beam;

② Spacing dimensions of bolt holes connected with other components (such as columns). Tighten the high-strength bolt after the adjustment test meets the requirements.

5. Install accessories

Roof purlins and wall purlins are installed simultaneously. Before installing purlins, check the deformation of the components, such as excessive treatment, oil and sediment on the surface of the components. Several purlins are hoisted together as a group, and the purlin slope is checked after a span is installed. It is required that the straightness of the purlin be controlled within the allowable deviation range, otherwise the connection bolt (padded block) is adjusted.

6. Recheck, adjust, weld and repaint

After the hoisting is completed, all components shall be reinspected and adjusted. After meeting the design requirements, on-site welding shall be carried out to repair the paint damage of the components.