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A platform for research: civil engineering, architecture and urbanism
Foundation pit support structure with blasting vibration isolation effect and rock foundation pit blasting excavation method
The invention discloses a foundation pit enclosure structure with a blasting vibration isolation effect and a rock foundation pit blasting excavation method, the foundation pit enclosure structure is divided into a secant pile enclosure structure and a diaphragm wall enclosure structure, the secant pile enclosure structure comprises plain concrete piles and vibration isolation concrete piles, the plain concrete piles and the vibration isolation concrete piles are staggered and engaged, and the diaphragm wall enclosure structure is arranged between the plain concrete piles and the vibration isolation concrete piles. The vibration isolation concrete pile comprises a concrete pile body and a sandwich wave resistance pipe, the middle of the concrete pile body is sleeved with the sandwich wave resistance pipe, and the two ends of the concrete pile body extend outwards from the interior of the sandwich wave resistance pipe and extend out of the sandwich wave resistance pipe. The diaphragm wall enclosure structure comprises a concrete wall plate and sandwich wave resistance plates installed on the two sides of the middle of the concrete wall plate. According to the invention, the wave resistance tube/wave resistance plate is introduced into the enclosure structure, and a material with a porous characteristic in the core layer is used as a part of enclosure structure material, so that the characteristics of a medium on a blasting vibration propagation path are obviously changed, the wave impedance difference between a vibration isolation barrier and a rock stratum is increased, and the vibration isolation effect is improved.
本发明公开了一种具有爆破隔振作用的基坑围护结构及岩石基坑爆破开挖方法，其分为咬合桩围护结构和地连墙围护结构，上述咬合桩围护结构包括素混凝土桩及隔振混凝土桩，素混凝土桩及隔振混凝土桩交错咬合，隔振混凝土桩包括混凝土桩及夹芯波阻管，夹芯波阻管套设于混凝土桩的中部，混凝土桩的两端由夹芯波阻管内向外伸出并延伸至夹芯波阻管外部；上述地连墙围护结构包括混凝土墙板及安装于混凝土墙板中部两侧的夹芯波阻板。本发明中将波阻管/波阻板引入围护结构中，以利用芯层中具有多孔隙特性的材料作为部分围护结构材料，从而显著改变爆破振动传播途径上介质的特征，增大隔振屏障与岩石地层波阻抗差异，提高隔振效果。
Foundation pit support structure with blasting vibration isolation effect and rock foundation pit blasting excavation method
The invention discloses a foundation pit enclosure structure with a blasting vibration isolation effect and a rock foundation pit blasting excavation method, the foundation pit enclosure structure is divided into a secant pile enclosure structure and a diaphragm wall enclosure structure, the secant pile enclosure structure comprises plain concrete piles and vibration isolation concrete piles, the plain concrete piles and the vibration isolation concrete piles are staggered and engaged, and the diaphragm wall enclosure structure is arranged between the plain concrete piles and the vibration isolation concrete piles. The vibration isolation concrete pile comprises a concrete pile body and a sandwich wave resistance pipe, the middle of the concrete pile body is sleeved with the sandwich wave resistance pipe, and the two ends of the concrete pile body extend outwards from the interior of the sandwich wave resistance pipe and extend out of the sandwich wave resistance pipe. The diaphragm wall enclosure structure comprises a concrete wall plate and sandwich wave resistance plates installed on the two sides of the middle of the concrete wall plate. According to the invention, the wave resistance tube/wave resistance plate is introduced into the enclosure structure, and a material with a porous characteristic in the core layer is used as a part of enclosure structure material, so that the characteristics of a medium on a blasting vibration propagation path are obviously changed, the wave impedance difference between a vibration isolation barrier and a rock stratum is increased, and the vibration isolation effect is improved.
本发明公开了一种具有爆破隔振作用的基坑围护结构及岩石基坑爆破开挖方法，其分为咬合桩围护结构和地连墙围护结构，上述咬合桩围护结构包括素混凝土桩及隔振混凝土桩，素混凝土桩及隔振混凝土桩交错咬合，隔振混凝土桩包括混凝土桩及夹芯波阻管，夹芯波阻管套设于混凝土桩的中部，混凝土桩的两端由夹芯波阻管内向外伸出并延伸至夹芯波阻管外部；上述地连墙围护结构包括混凝土墙板及安装于混凝土墙板中部两侧的夹芯波阻板。本发明中将波阻管/波阻板引入围护结构中，以利用芯层中具有多孔隙特性的材料作为部分围护结构材料，从而显著改变爆破振动传播途径上介质的特征，增大隔振屏障与岩石地层波阻抗差异，提高隔振效果。
Foundation pit support structure with blasting vibration isolation effect and rock foundation pit blasting excavation method
一种具有爆破隔振作用的基坑围护结构及岩石基坑爆破开挖方法
CHENG LONGHU (author) / ZHANG ZHANRONG (author) / LI SHILIANG (author) / ZHANG YAN (author) / YU TINGXIN (author) / XUE FENG (author) / CHU TUANJIE (author) / WANG ZHONGHUA (author) / TU RENPAN (author) / XU ZEPENG (author)
2023-01-24
Patent
Electronic Resource
Chinese
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