A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under poor geological conditions
The invention relates to a back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under poor geological conditions. When the tunnel portal section is a V-leveltunnel portal with broken surrounding rocks and does not meet the condition of half-buried tunnel entering, "artificial terrain" is carried out in combination with existing terrain, front and side retaining walls are constructed on the unsymmetrical pressure side, and cemented soil backfilling and rolling are carried out on the inner sides of the front retaining wall and the side retaining walls to meet the tunnel entering condition; and the back pressure backfill method is adopted for tunnel entering construction, the tunnel entering problems of mountainside unsymmetrical pressure and local leakage can be solved, and meanwhile, the excavation height of side and the heading slopes of a shallow-buried unsymmetrical pressure section can be reduced, so that interference and damage to a mountain are reduced, water and soil loss caused by flood season construction is avoided, the influence of excavation on the surrounding environment is reduced, and the concept of harmonious development between human beings and nature is fully embodied. The back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under the poor geological conditions can realize safetunnel entering, plays an important role in ensuring the integral construction of a project, and has certain popularization and practical values.
本发明涉及一种适用于较差地质条件下偏压进洞的反压回填施工方法。当洞口段为围岩较破碎的Ⅴ级洞口、不满足“半明半暗”进洞的条件时，结合现有地势进行“人造地形”，在偏压侧施作正面及侧面挡墙，对正面挡墙及侧面挡墙内侧进行水泥土回填并碾压，以满足进洞条件。采用反压回填方法进洞施工，可解决傍山偏压、局部漏空的隧道进洞难题，同时可以减少浅埋偏压地段边、仰坡开挖高度，减少对山体的干扰和破坏，避免汛期施工造成的水土流失，减少了开挖对周边环境影响小，充分体现了人与自然和谐发展的理念。本发明可以实现安全进洞，对保证项目整体建成有重要作用，具有一定的推广和实用价值。
Back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under poor geological conditions
The invention relates to a back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under poor geological conditions. When the tunnel portal section is a V-leveltunnel portal with broken surrounding rocks and does not meet the condition of half-buried tunnel entering, "artificial terrain" is carried out in combination with existing terrain, front and side retaining walls are constructed on the unsymmetrical pressure side, and cemented soil backfilling and rolling are carried out on the inner sides of the front retaining wall and the side retaining walls to meet the tunnel entering condition; and the back pressure backfill method is adopted for tunnel entering construction, the tunnel entering problems of mountainside unsymmetrical pressure and local leakage can be solved, and meanwhile, the excavation height of side and the heading slopes of a shallow-buried unsymmetrical pressure section can be reduced, so that interference and damage to a mountain are reduced, water and soil loss caused by flood season construction is avoided, the influence of excavation on the surrounding environment is reduced, and the concept of harmonious development between human beings and nature is fully embodied. The back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under the poor geological conditions can realize safetunnel entering, plays an important role in ensuring the integral construction of a project, and has certain popularization and practical values.
本发明涉及一种适用于较差地质条件下偏压进洞的反压回填施工方法。当洞口段为围岩较破碎的Ⅴ级洞口、不满足“半明半暗”进洞的条件时，结合现有地势进行“人造地形”，在偏压侧施作正面及侧面挡墙，对正面挡墙及侧面挡墙内侧进行水泥土回填并碾压，以满足进洞条件。采用反压回填方法进洞施工，可解决傍山偏压、局部漏空的隧道进洞难题，同时可以减少浅埋偏压地段边、仰坡开挖高度，减少对山体的干扰和破坏，避免汛期施工造成的水土流失，减少了开挖对周边环境影响小，充分体现了人与自然和谐发展的理念。本发明可以实现安全进洞，对保证项目整体建成有重要作用，具有一定的推广和实用价值。
Back pressure backfill construction method suitable for unsymmetrical pressure tunnel entering under poor geological conditions
一种适用于较差地质条件下偏压进洞的反压回填施工方法
ZHANG CHENGKAI (author) / HU JIANHUA (author) / YAN ZIHAI (author) / TONG YUCONG (author) / YOU HONGBO (author) / YE KA'ER (author) / LI SHI (author) / CHEN ZIJIAN (author)
2020-07-03
Patent
Electronic Resource
Chinese
IPC:
E21D
SHAFTS
,
Schächte
/
E02D
FOUNDATIONS
,
Gründungen
/
E21F
Sicherheitsvorrichtungen, Förderung, Auffüllen oder Bergversatz, Rettungswesen, Bewetterung oder Entwässerung in oder von Gruben oder Tunnels
,
SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINAGE IN OR OF MINES OR TUNNELS
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