A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Pipeline construction method under urban complex stratum
The invention discloses a manual pipe jacking construction method under an urban complex stratum. Grouting pre-consolidation reinforcement is conducted on the ground surface of the pipeline tunnel face under the stratum. One row of grouting holes are formed in each of the two sides of the axis of the pipeline, the horizontal distance between each row of holes and the central axis of the pipeline is 0.3 m, the holes are alternately formed in a quincunx shape, the distance between the holes in the same row is 1.0 m, and the depth of each grouting hole is 0.2 m from the ground elevation to the top elevation of the pipeline. A dewatering well is arranged on the line side of the pipeline under the stratum, and earth surface grouting consolidation reinforcement is carried out on the adjacent surface geology of the dewatering well and the pipeline. The consolidation grouting holes are arranged in two rows along the trend of the pipeline on the adjacent surfaces, the row distance is 0.3 m, the hole distance of the holes in the same row is 1.0 m, and the minimum vertical distance between the axis of the front row and the edge of the dewatering well is 0.5 m. By the adoption of the earth surface pre-consolidation method, the effect of stabilizing the stratum is exerted to the maximum extent, the problem of collapse of the unconsolidated stratum is solved, the problems of collapse and land subsidence in manual pipe jacking construction can be effectively prevented, reduced and even avoided, resource waste caused by accident treatment is reduced, and the construction cost is saved.
本发明公开一种城区复杂地层下人工顶管施工方法。在地层下管道掌子面地表进行注浆预固结加固；灌浆孔沿管道轴线两侧布置各一排，各排孔与管道中心轴线水平距离0.3m，孔成梅花形交替布置，同排孔孔距1.0m，各灌浆孔深度为地面高程至管道顶上高程0.2m处；在地层下管道沿线侧设置有降水井，在降水井与管道相邻面地质进行地表注浆固结加固；固结灌浆孔在相邻面沿管道走向布置两排，排距0.3m，同排孔孔距1.0m，前排轴线与降水井边缘的最小垂直距离0.5m。本发明采用地表预固结方法，最大限度地发挥了稳固地层的作用，解决松散地层塌方问题，能有效预防、减少甚至避免了人工顶管施工中遇坍塌及地面沉降问题，减少了因处理事故造成的资源浪费，节约了施工成本。
Pipeline construction method under urban complex stratum
The invention discloses a manual pipe jacking construction method under an urban complex stratum. Grouting pre-consolidation reinforcement is conducted on the ground surface of the pipeline tunnel face under the stratum. One row of grouting holes are formed in each of the two sides of the axis of the pipeline, the horizontal distance between each row of holes and the central axis of the pipeline is 0.3 m, the holes are alternately formed in a quincunx shape, the distance between the holes in the same row is 1.0 m, and the depth of each grouting hole is 0.2 m from the ground elevation to the top elevation of the pipeline. A dewatering well is arranged on the line side of the pipeline under the stratum, and earth surface grouting consolidation reinforcement is carried out on the adjacent surface geology of the dewatering well and the pipeline. The consolidation grouting holes are arranged in two rows along the trend of the pipeline on the adjacent surfaces, the row distance is 0.3 m, the hole distance of the holes in the same row is 1.0 m, and the minimum vertical distance between the axis of the front row and the edge of the dewatering well is 0.5 m. By the adoption of the earth surface pre-consolidation method, the effect of stabilizing the stratum is exerted to the maximum extent, the problem of collapse of the unconsolidated stratum is solved, the problems of collapse and land subsidence in manual pipe jacking construction can be effectively prevented, reduced and even avoided, resource waste caused by accident treatment is reduced, and the construction cost is saved.
本发明公开一种城区复杂地层下人工顶管施工方法。在地层下管道掌子面地表进行注浆预固结加固；灌浆孔沿管道轴线两侧布置各一排，各排孔与管道中心轴线水平距离0.3m，孔成梅花形交替布置，同排孔孔距1.0m，各灌浆孔深度为地面高程至管道顶上高程0.2m处；在地层下管道沿线侧设置有降水井，在降水井与管道相邻面地质进行地表注浆固结加固；固结灌浆孔在相邻面沿管道走向布置两排，排距0.3m，同排孔孔距1.0m，前排轴线与降水井边缘的最小垂直距离0.5m。本发明采用地表预固结方法，最大限度地发挥了稳固地层的作用，解决松散地层塌方问题，能有效预防、减少甚至避免了人工顶管施工中遇坍塌及地面沉降问题，减少了因处理事故造成的资源浪费，节约了施工成本。
Pipeline construction method under urban complex stratum
一种城区复杂地层下管道施工方法
ZHAO QUANFENG (author) / CAO DONG (author) / YIN XIN (author) / ZHOU YI (author) / XU JING (author) / ZHANG PING (author) / LUO YUANBING (author) / LIU QIANG (author) / XING HONGWEI (author) / WANG JUNJIE (author)
2021-06-11
Patent
Electronic Resource
Chinese
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