A diaphragm wall top quality reinforced pouring method
CN121896986BActive Publication Date: 2026-08-28SINOHYDRO FOUND ENG
Patent Information
- Application Number
- CN202610166236.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2046-02-05
AI Technical Summary
Technical Problem
[0003]然而，在百米级深墙的建造过程中，现有的常规导管直升法在浇筑至墙顶区域时存在以下缺陷：当混凝土液面接近设计墙顶标高时，导管内外的液面高差（Δh）急剧减小，导致推动混凝土流动和密实的自然压力（P=ρg
Δh）严重不足；为了勉强完成最后阶段的浇筑，施工人员通常被迫采用“上下反复提动导管”的应急措施；这一操作会严重扰乱槽孔内混凝土的平稳置换过程，极易导致已浇筑的混凝土与护壁泥浆相互掺混，在墙顶区域形成强度低、抗渗性差的“夹泥”或“疏松”薄弱层；这是导致防渗墙顶部质量不合格、常常需要大量超浇并后期人工凿除的根本原因，不仅造成了材料浪费和成本增加，也影响了施工效率和结构整体可靠性
Benefits of technology
本发明在墙顶浇筑阶段，通过延长浇筑导管主动提升并维持延长浇筑导管内混凝土的液面高度，从而重建并保持一个足够大的、稳定的自然压力差，确保混凝土在恒定、充足的自重压力下完成顶部顺利浇筑，能够从根本上避免提管扰动，获得密实、均匀、高质量的顶段墙体。
✦ Generated by Eureka AI based on patent content.
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Figure CN121896986B_ABST
Abstract
The present application relates to the field of civil engineering construction technology, particularly relates to a kind of diaphragm wall top quality reinforcing pouring method, comprising the following steps: S1.conventional stage pouring;S2.system switching: when the diaphragm wall slot hole concrete liquid level rises to the elevation of the predetermined height from the top surface of guide wall, stop the pouring of conventional guide pipe vertical lift method, and the conventional pouring guide pipe above the top surface of guide wall is removed;S3.Installation of extended pouring guide pipe: install extended pouring guide pipe in the original guide pipe position;S4.Tian pump pouring;S5.maintain high pressure head pouring;S6.end and disassembly.The present application in wall top pouring stage, by extending pouring guide pipe actively lifting and maintaining the liquid level height of the concrete in extended pouring guide pipe, to rebuild and keep a large enough, stable natural pressure difference, ensure that the concrete in constant, sufficient self-weight pressure complete top smooth pouring, can fundamentally avoid pipe disturbance, obtain dense, uniform, high-quality top section wall.
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Citation Information
Patent Citations
Concrete pouring method for concrete diaphragm wall
CN113062324A
Concrete continuous pouring method and structure for bottom-sealed steel pipe column and uplift pile
CN113914310A