一、工法特點

1、 Characteristics of construction methods

精度控制優勢

Precision control advantage

倒序安裝是從頂部結構開始向下安裝，與常規順序安裝相比，在安裝過程中更容易對異形雙曲鋼結構柱的頂部節點進行準確定位。因為頂部節點通常是與其他主要結構（如屋面梁等）相連接的關鍵部位，倒序安裝可以先確定這個關鍵部位的空間位置，通過準確的測量和調整手段，如使用全站儀等高精度測量儀器，將頂部節點的誤差控制在極小范圍內，從而為后續柱體的安裝提供準確的基準。

Reverse installation starts from the top structure and is installed downwards. Compared with conventional sequential installation, it is easier to accurately locate the top nodes of the irregular hyperbolic steel structure columns during the installation process. Because the top node is usually a critical part connected to other major structures such as roof beams, reverse installation can first determine the spatial position of this critical part. Through accurate measurement and adjustment methods, such as using high-precision measuring instruments such as total stations, the error of the top node can be controlled within a very small range, providing accurate benchmarks for the subsequent installation of columns.

施工性提升

Improvement of construction safety

采用倒序安裝，在安裝上部結構時，下方的作業空間相對開闊，減少了下方已安裝結構對施工設備和人員的潛在威脅。例如，在安裝過程中，起重機等設備的起吊和移動不會受到下部已安裝結構的阻礙，降低了碰撞風險。而且，施工人員在高處作業時，下方尚未安裝的部分可以提供更好的視野和操作空間，有利于防護措施的實施。

By using reverse installation, when installing the upper structure, the working space below is relatively open, reducing the potential safety threats to construction equipment and personnel from the already installed structure below. For example, during the installation process, the lifting and movement of equipment such as cranes will not be hindered by the lower installed structure, reducing the risk of collision. Moreover, when construction personnel work at heights, the uninstalled parts below can provide better visibility and operating space, which is conducive to the implementation of safety protection measures.

質量保證措施有效

Effective quality assurance measures

由于是倒序安裝，每安裝一節柱體都可以對已安裝部分進行質量檢查和調整。在安裝下一節柱體時，可以通過預拼裝等方式確保與上一節柱體的連接精度，使整個異形雙曲鋼結構柱的線形更加順暢。例如，對于雙曲造型部分，可以在地面上進行預拼裝，檢查相鄰柱體之間的曲面過渡是否自然、接口是否緊密，從而保證整個結構的質量符合設計要求。

Due to the reverse installation, eachinstalled section of the column can undergo quality inspection and adjustment of the already installed parts. When installing the next section of the column, the connection accuracy with the previous section can be ensured through pre assembly and other methods, making the overall shape of the irregular hyperbolic steel structure column smoother. For example, for the hyperbolic shaped part, pre assembly can be carried out on the ground to check whether the curved transitions between adjacent columns are natural and whether the interfaces are tight, thereby ensuring that the quality of the entire structure meets the design requirements.

二、施工工藝流程

2、 Construction process flow

施工準備

Construction preparation

技術準備：仔細研讀設計圖紙，對異形雙曲鋼結構柱的形狀、尺寸、材質、連接方式等技術參數進行詳細分析。利用BIM（建筑信息模型）技術對鋼結構柱進行三維建模，模擬安裝過程，提前發現可能存在的問題，如構件之間的碰撞、安裝順序不合理等，并制定相應的解決方案。同時，根據設計要求和規范標準，編制詳細的施工方案和質量、控制計劃。

Technical preparation: Carefully study the design drawings and conduct a detailed analysis of the technical parameters such as shape, size, material, and connection method of the irregular hyperbolic steel structure columns. Using BIM (Building Information Modeling) technology to conduct 3D modeling of steel structure columns, simulate the installation process, identify potential issues in advance, such as collisions between components and unreasonable installation sequence, and develop corresponding solutions. At the same time, according to design requirements and regulatory standards, prepare detailed construction plans and quality and safety control plans.

材料與設備準備：按照設計要求采購合格的鋼材，對鋼材的材質、規格等進行嚴格檢驗。對于異形雙曲鋼結構柱，由于其形狀特殊，可能需要定制加工一些特殊的連接節點和構配件。在設備方面，準備好足夠的起重機、電焊機、測量儀器（如全站儀、水準儀）等施工設備，并確保設備性能良好，能夠滿足施工要求。

Material and equipment preparation: Purchase qualified steel according to design requirements, and conduct strict inspections on the material and specifications of the steel. For special-shaped hyperbolic steel structural columns, due to their unique shape, it may be necessary to customize and process some special connection nodes and structural components. In terms of equipment, prepare sufficient construction equipment such as cranes, welding machines, and measuring instruments (such as total stations and level gauges), and ensure that the equipment has good performance and can meet the construction requirements.

場地準備：清理施工現場，設置好材料堆放區和構件拼裝區。對于異形雙曲鋼結構柱的構件，由于其形狀復雜，在堆放時要做好標識和防護，防止構件變形和損壞。同時，在安裝現場要做好基礎處理，確保基礎的平整度和強度符合要求，為鋼結構柱的安裝提供良好的基礎條件。

Site preparation: Clean up the construction site, set up material stacking areas and component assembly areas. For the components of irregular hyperbolic steel structure columns, due to their complex shape, proper labeling and protection should be done during stacking to prevent deformation and damage of the components. At the same time, foundation treatment should be done well at the installation site to ensure that the flatness and strength of the foundation meet the requirements, providing good foundation conditions for the installation of steel structure columns.

頂部節點安裝

Top node installation

根據預先確定的空間坐標，使用起重機

Using a crane based on predetermined spatial coordinates