大坝填筑施工方案

目 录

1. 概述 ················································································· １

1.1. 工程概况 ·································································· １ 1.2. 编制依据 ·································································· ２ 1.3. 坝体填筑料主要工程量及技术要求·································· ２ 2. 施工布置 ··········································································· ４

2.1. 施工道路的布置 ························································· ４ 2.2. 施工用水、电布置 ······················································ ５ 2.3. 主坝上游基坑排水布置 ················································ ５ 3. 坝体填筑施工 ····································································· ６

3.1. 坝体填筑原则 ···························································· ６ 3.2. 大坝填筑施工工艺及坝面划分原则·································· ７ 3.3. 坝料开采加工与平衡 ··················································· ９ 3.4. 坝料运输 ······························································· １２ 3.5. 基础面清理及验收 ··················································· １２ 3.6. 过渡(反滤料)填筑 ···················································· １３ 3.7. 全强风化料填筑 ······················································ １４ 3.8. 排水料填筑 ···························································· １６ 3.9. 特殊部位结合面处理 ················································ １６ 3.10. 干砌石护坡的施工 ·················································· １８ 3.11. 沥青心墙施工 ························································ １８ 4. 雨季施工 ········································································ １９

4.1. 雨季施工措施 ························································· １９ 4.2. 其它控制措施 ························································· ２０ 4.3. 雨期坝面排水措施 ··················································· ２０ 5. 施工安全及质量保证措施 ··················································· ２１

5.1. 安全保证措施 ························································· ２１ 5.2. 施工准备阶段质量保证措施 ······································· ２２ 5.3. 坝体填筑过程质量保证措施 ······································· ２４ 5.4. 总体质量保证措施 ··················································· ２６ 5.5. 各类坝料填筑检查项目及取样次数、控制标准和碾压机械技术性能 ················································································ ２８ 5.6. 坝体质量控制关键点 ················································ ２８ 6. 施工进度计划及工期保证措施 ············································· ３０

6.1. 施工进度计划 ························································· ３０ 6.2. 施工强度分析 ························································· ３０ 6.3. 工期保证措施 ························································· ３２ 7. 资源配置 ········································································ ３３

7.1. 管理人员配置 ························································· ３３ 7.2. 劳动力安排 ···························································· ３４ 7.3. 施工机械设备的配置 ················································ ３４ 8. 安全文明生产及环境保护措施 ············································· ３５

8.1. 料场 ····································································· ３５ 8.2. 坝料运输 ······························································· ３５ 8.3. 坝料填筑 ······························································· ３６ 9. 强制性条文 ····································································· ３７

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1.概述

1.1.工程概况

水库地处，主要建筑物有主坝和溢洪道。主、副坝均采用沥青混凝土心墙土石坝，主坝顶高程m，最大坝高30.0m；主坝右岸设自溢竖井式溢洪道，结合导流洞改造而成。上水库正常蓄水位m，死水位m，调节库容m3，死库容万m3，总库容m3。

坝顶宽度8.0m。坝顶上游设防浪墙，下游设L型挡墙。大坝上游坝坡为1:30；下游坝坡为1:2.7，高程555.00m处设一马道，马道宽度为4m。沥青混凝土心墙位于大坝上游侧，心墙中心桩号坝0+002.200m，为厚0.5m的等厚心墙。当沥青混凝土心墙部位坝基全风化层厚度大于5m时，采用混凝土防渗墙连接；对于主坝右岸全强风化较薄部位，采用混凝土基座连接，基础开挖至弱风化基岩。沥青混凝土心墙采用底部端头加厚平接方式，接触面设沥青马蹄脂及一道铜止水。

坝体填筑料分区从上游至下游依次为：干砌块石护坡、碎石垫层、上游全强风化料区、上游过渡区、沥青混凝土心墙、下游过渡区、下游全强风化料区和下游坝面草皮护坡，心墙上下游过渡层水平宽度均为2.0m。另外下游坝基清坡后设0.5m厚的中砂反滤层，反滤层与全强风化料间设2.0m厚碎石层，作为下游坝体排水体。

上游护坡区：上游边坡设一级坡，坡比为1∶3.0，采用干砌块石护坡。干砌块石层厚0.5m，石料粒径30cm～50cm；其底部为级配碎石垫层兼反滤层，厚度0.5m，石料粒径为0.5cm～8cm。护坡所需石料均从石料场取料，为新鲜花岗岩，其中碎石料由人工扎制而成。

１

1.2.编制依据

⑴ 、坝体填筑要求：《沥青混凝土心墙土石坝填筑施工技术要求》； ⑵ 、设计图纸；

⑶ 、《土建工程施工技术条款》；

⑷ 、《碾压式土石坝施工规范》（DL/T5129-2001）。 ⑸ 、《水工碾压式沥青混凝土施工规范》（DL/T5363-2006）。 1.3.坝体填筑料主要工程量及技术要求 1、坝体填筑主要工程量见下表

坝体填筑主要工程量

序号 1 2 部位 坝料名称 沥青混凝土 坝体全强风化料 单位 m3 m3 方量 备注 厚50cm 中粒径花岗岩全、强风化料，块石最大粒径小于300mm 沥青混凝土心墙两侧过渡3 过渡料级配碎石料 m3 料、粒径小于80mm的级配碎石 上水库 4 下游坝基垫层料级配碎石料 m3 m3 m3 m3 5 级配中砂反滤料 上游坝坡垫层料级配 6 碎石料 7 上游坝坡干砌石 下游坝基排水垫层料、粒径小于40mm的级配 碎石 下游坝基反滤层、粒径小于5mm的级配中砂 上游坝坡护坡垫层料、粒径为5~80mm的级配 碎石 石料粒径均值30cm~50cm新鲜花岗岩 2、填坝料施工质量控制要求

1）、上、下游全强风化料区：全强风化料采用上水库进出水口、溢洪道、库岸防护、备用料场等建筑物开挖土石料。全风化料碾压后强度指标要求干容重不小于1.68t/m3，强风化料碾压后强度指标要求干容重不小于

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1.91t/m3。设计上、下游全强风化区填筑料级配见下表

强风化花岗岩填筑料级配表

粒径范围(mm) 占总重百分比(%) 300~200 200~100 100~80 80~60 60~40 40~20 20~10 10~5 <5 <0.075 20 26 7 7 8 10 7 5 10 1 粒径小于5mm全风化花岗岩填筑料级配表

粒径范围(mm) 占总重百分比(%) 5~2 34 2~0.5 26.2 0.5~0.25 4.9 0.25~0.075 5.9 0.075~0.005 11 <0.005 18 2）、过渡料：为沥青混凝土心墙两边提供均匀支撑，满足心墙与坝壳料之间变形的过渡要求，且具有良好的排水性和渗透稳定性，满足施工要求的承载力。过渡料由新鲜花岗岩人工扎制而成，最大粒径为80mm，小于5mm粒径含量为25%～40%，小于0.075mm粒径含量不超过5%，级配连续，碾压后强度指标要求干容重不小于2.15t/m3。设计过渡料级配见下表

过渡料级配表

粒径范围(mm) 上包线 占总重百分比(%) 平均线 下包线 80~60 4 11 18 60~40 10 12 14 40~20 16 17 18 20~10 15 15 15 10~5 15 12.5 10 <5 40 32.5 25 <0.075 5 3 1 3）、中砂反滤层

坝基清理后，在坝基与排水体之间设0.5m厚的中砂反滤层。碾压后要求干容重2.21 t/m3。设计中砂反滤层级配见下表

中砂级配表

粒径范围(mm) 占总重百分比(%) >5 2.9 5~2.5 18.9 2.5~1.25 15.1 1.25~0.63 22.2 0.63~0.315 17.9 0.315~0.16 8.3 <0.16 14.6 4）、排水碎石

采用扎制的人工碎石料，为弱风化~新鲜石料，最大粒径为40mm。碾压

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