Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Underwater anchor rod construction method for sand-rich stratum
The invention relates to a sand-rich stratum underwater anchor rod construction method. The sand-rich stratum underwater anchor rod construction method comprises the following steps that 1, a waterproof curtain is embedded in the periphery of a foundation pit; 2, drilling holes in the waterproof curtain; 3, drilling holes in the sand stratum by adopting a casing follow-up process, and meanwhile, spraying wall protection slurry into the holes until the designed hole depth is reached; 4, after the hole is formed, primary sand washing slurry is injected into the hole for sand washing, and after sand washing is completed, the primary sand washing slurry continues to be injected while the inner casing pipe of the drilling machine is pulled out step by step; and 5, inserting the anchor rod into the outer sleeve, lowering a grouting pipe, injecting grouting liquid from the bottom of the anchor rod, and pulling out the outer sleeve section by section after completion. The waterproof curtain is drilled, so that the hole opening of the drilled hole has a certain supporting force and is not prone to deformation, the problem that the foundation pit at the sand-rich stratum can generate water and sand gushing during anchor rod supporting is solved through the wall protection slurry, the sand stratum can adopt anchor rod supporting, and therefore the construction period of the foundation pit at the sand stratum is shortened, and the construction cost is reduced.
本申请涉及一种富含砂地层水下锚杆施工方法，其包括以下步骤：步骤1：在基坑周边埋设止水帷幕；步骤2：在止水帷幕上钻孔；步骤3：采用套管跟进工艺在砂地层上钻孔，同时向孔内喷射护壁泥浆，直至达到设计孔深；步骤4：成孔后向孔内注入初级洗沙泥浆进行洗沙，洗沙完成后，一边继续注射初级洗沙泥浆一边逐步拔出钻机内套管；步骤5：向外套管中插入锚杆同时下注浆管，从锚杆底部开始注射注浆液，完成后逐节拔出外套管。本申请通过在止水帷幕处钻孔使得钻孔的孔口处有一定支撑力不易变形，通过护壁泥浆解决富含砂地层处基坑在锚杆支护时会产生涌水涌沙的问题，使得砂地层能够采用锚杆支护，从而缩短砂地层处基坑施工的工期和降低施工成本。
Underwater anchor rod construction method for sand-rich stratum
The invention relates to a sand-rich stratum underwater anchor rod construction method. The sand-rich stratum underwater anchor rod construction method comprises the following steps that 1, a waterproof curtain is embedded in the periphery of a foundation pit; 2, drilling holes in the waterproof curtain; 3, drilling holes in the sand stratum by adopting a casing follow-up process, and meanwhile, spraying wall protection slurry into the holes until the designed hole depth is reached; 4, after the hole is formed, primary sand washing slurry is injected into the hole for sand washing, and after sand washing is completed, the primary sand washing slurry continues to be injected while the inner casing pipe of the drilling machine is pulled out step by step; and 5, inserting the anchor rod into the outer sleeve, lowering a grouting pipe, injecting grouting liquid from the bottom of the anchor rod, and pulling out the outer sleeve section by section after completion. The waterproof curtain is drilled, so that the hole opening of the drilled hole has a certain supporting force and is not prone to deformation, the problem that the foundation pit at the sand-rich stratum can generate water and sand gushing during anchor rod supporting is solved through the wall protection slurry, the sand stratum can adopt anchor rod supporting, and therefore the construction period of the foundation pit at the sand stratum is shortened, and the construction cost is reduced.
本申请涉及一种富含砂地层水下锚杆施工方法，其包括以下步骤：步骤1：在基坑周边埋设止水帷幕；步骤2：在止水帷幕上钻孔；步骤3：采用套管跟进工艺在砂地层上钻孔，同时向孔内喷射护壁泥浆，直至达到设计孔深；步骤4：成孔后向孔内注入初级洗沙泥浆进行洗沙，洗沙完成后，一边继续注射初级洗沙泥浆一边逐步拔出钻机内套管；步骤5：向外套管中插入锚杆同时下注浆管，从锚杆底部开始注射注浆液，完成后逐节拔出外套管。本申请通过在止水帷幕处钻孔使得钻孔的孔口处有一定支撑力不易变形，通过护壁泥浆解决富含砂地层处基坑在锚杆支护时会产生涌水涌沙的问题，使得砂地层能够采用锚杆支护，从而缩短砂地层处基坑施工的工期和降低施工成本。
Underwater anchor rod construction method for sand-rich stratum
一种富含砂地层水下锚杆施工方法
ZHANG BINGFENG (Autor:in) / FENG XIAOXUAN (Autor:in) / QIAO PENGSHENG (Autor:in) / SHAO PENGHUI (Autor:in) / WANG PENGFEI (Autor:in)
17.01.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
E02D
FOUNDATIONS
,
Gründungen
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