Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method for widening protection of old bridge abutment during reconstruction and extension of expressway
The invention discloses a highway reconstruction and extension old bridge abutment widening protection construction method, which belongs to the technical field of bridge extension, and comprises the following steps: steel sheet piles are inserted according to the depth of a foundation pit, and the driving range occupies the positions of a widening bridge abutment, a bearing platform and a pile foundation; a foundation pit is excavated; before pile foundation widening, foundation expanding or bearing platform construction, a plurality of steel sheet piles are sequentially pulled out every other steel sheet pile, anchor rods or steel floral tubes are constructed at the positions where the steel sheet piles are pulled out, and then grouting treatment is conducted; all the remaining steel sheet piles are pulled out in sequence, grouting treatment is conducted after anchor rods or steel floral tubes are constructed, and the steel sheet piles and the anchor rods or the steel floral tubes in the previous step are arranged in a quincunx shape; a reinforcing mesh is hung, and concrete is sprayed; constructing a pile foundation, an expanded foundation or a bearing platform in the foundation pit; and after the bearing platform is excavated, construction is conducted on the bearing platform, the rib plate platform body and manual backfilling immediately. The bridge abutment can be used as a temporary support in the construction process, stability of filling soil behind the bridge abutment is guaranteed, the bridge abutment is backfilled in time, and high-speed driving safety is facilitated.
本发明公开了一种高速公路改扩建旧桥桥台拼宽防护施工方法，属于桥梁扩建技术领域，其包括：按照基坑深度插打钢板桩，打入范围侵占拼宽桥台、承台与桩基的位置；开挖基坑；拼宽桩基、扩大基础或承台施工前，每隔一根抽出一根钢板桩依次抽出多根钢板桩，并将抽出钢板桩位置处施工锚杆或钢花管，后进行注浆处理；将余下的钢板桩依次全部抽出，并施工锚杆或钢花管后进行注浆处理，并与上述步骤中的锚杆或钢花管呈梅花形布置；挂设钢筋网片，喷射混凝土；在基坑内施工桩基、扩大基础或承台；承台开挖后立即对承台、肋板台身、人工回填进行施工。本发明可作为施工过程中的临时支护使用，保证台后填土稳定，并及时对桥台回填，有利于高速行车安全。
Construction method for widening protection of old bridge abutment during reconstruction and extension of expressway
The invention discloses a highway reconstruction and extension old bridge abutment widening protection construction method, which belongs to the technical field of bridge extension, and comprises the following steps: steel sheet piles are inserted according to the depth of a foundation pit, and the driving range occupies the positions of a widening bridge abutment, a bearing platform and a pile foundation; a foundation pit is excavated; before pile foundation widening, foundation expanding or bearing platform construction, a plurality of steel sheet piles are sequentially pulled out every other steel sheet pile, anchor rods or steel floral tubes are constructed at the positions where the steel sheet piles are pulled out, and then grouting treatment is conducted; all the remaining steel sheet piles are pulled out in sequence, grouting treatment is conducted after anchor rods or steel floral tubes are constructed, and the steel sheet piles and the anchor rods or the steel floral tubes in the previous step are arranged in a quincunx shape; a reinforcing mesh is hung, and concrete is sprayed; constructing a pile foundation, an expanded foundation or a bearing platform in the foundation pit; and after the bearing platform is excavated, construction is conducted on the bearing platform, the rib plate platform body and manual backfilling immediately. The bridge abutment can be used as a temporary support in the construction process, stability of filling soil behind the bridge abutment is guaranteed, the bridge abutment is backfilled in time, and high-speed driving safety is facilitated.
本发明公开了一种高速公路改扩建旧桥桥台拼宽防护施工方法，属于桥梁扩建技术领域，其包括：按照基坑深度插打钢板桩，打入范围侵占拼宽桥台、承台与桩基的位置；开挖基坑；拼宽桩基、扩大基础或承台施工前，每隔一根抽出一根钢板桩依次抽出多根钢板桩，并将抽出钢板桩位置处施工锚杆或钢花管，后进行注浆处理；将余下的钢板桩依次全部抽出，并施工锚杆或钢花管后进行注浆处理，并与上述步骤中的锚杆或钢花管呈梅花形布置；挂设钢筋网片，喷射混凝土；在基坑内施工桩基、扩大基础或承台；承台开挖后立即对承台、肋板台身、人工回填进行施工。本发明可作为施工过程中的临时支护使用，保证台后填土稳定，并及时对桥台回填，有利于高速行车安全。
Construction method for widening protection of old bridge abutment during reconstruction and extension of expressway
一种高速公路改扩建旧桥桥台拼宽防护施工方法
WEI JIANBO (Autor:in) / JING PENGFEI (Autor:in) / ZHUANG QINGLIN (Autor:in) / ZHU YI (Autor:in) / LI SHIPENG (Autor:in) / ZHANG SHANSHAN (Autor:in) / YIN ZUOMIN (Autor:in)
26.12.2023
Patent
Elektronische Ressource
Chinesisch
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