硅酸盐通报 ›› 2026, Vol. 45 ›› Issue (5): 1571-1579.DOI: 10.16552/j.cnki.issn1001-1625.2025.1039
李小庆1(
), 王浦1, 方启兴1, 吴鹏1, 田尉军1, 党悦1, 刘金鑫2, 徐湘田2(
)
收稿日期:2025-10-28
修订日期:2025-12-19
出版日期:2026-05-15
发布日期:2026-06-10
通信作者:
徐湘田,博士,教授。E-mail: jtxuxt@ imu.edu.cn作者简介:李小庆(1984—),男,高级工程师。主要从事公路工程方面的研究。E-mail: 657366188@qq.com
基金资助:
LI Xiaoqing1(
), WANG Pu1, FANG Qixing1, WU Peng1, TIAN Weijun1, DANG Yue1, LIU Jinxin2, XU Xiangtian2(
)
Received:2025-10-28
Revised:2025-12-19
Published:2026-05-15
Online:2026-06-10
摘要:
现有检测手段难以检测水下桩基护筒内混凝土实际强度,未能对水下桩基混凝土抗压强度进行准确评估。为揭示水下桩基混凝土的早期抗压强度发展规律,本研究利用自主研发的控温自平衡加压养护装置对水下桩基环境进行模拟,开展了不同自重高度、养护温度、养护龄期对桩基混凝土早期抗压强度的影响试验。结果表明:与标准养护相比,模拟水下养护7 d的混凝土试件抗压强度提高6.56%;养护龄期是影响桩基混凝土早期抗压强度的主要因素,养护温度次之,自重高度影响相对较弱;延长养护龄期能提高养护温度对水下桩基混凝土抗压强度的改善效果;基于成熟度理论建立了水下桩基混凝土早期强度预测模型,预测值与实测值相对误差在7.0%以内,结合平昭高速桂江特大桥工程案例,可将护筒拆除龄期从17 d缩短到5 d。研究结果为水下桩基早期承载力评估与施工决策提供可靠依据。
中图分类号:
李小庆, 王浦, 方启兴, 吴鹏, 田尉军, 党悦, 刘金鑫, 徐湘田. 水下桩基混凝土早期强度预测模型及护筒拆除龄期研究[J]. 硅酸盐通报, 2026, 45(5): 1571-1579.
LI Xiaoqing, WANG Pu, FANG Qixing, WU Peng, TIAN Weijun, DANG Yue, LIU Jinxin, XU Xiangtian. Early Strength Prediction Model of Underwater Pile Foundation Concrete and Demolition Age of Casing[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2026, 45(5): 1571-1579.
| Composition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | K2O | Na2O | Loss |
|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 16.22 | 4.20 | 3.07 | 57.18 | 1.08 | 2.04 | 0.53 | 0.13 | 3.46 |
表1 水泥的主要化学组成
Table 1 Main chemical composition of cement
| Composition | SiO2 | Al2O3 | Fe2O3 | CaO | MgO | SO3 | K2O | Na2O | Loss |
|---|---|---|---|---|---|---|---|---|---|
| Mass fraction/% | 16.22 | 4.20 | 3.07 | 57.18 | 1.08 | 2.04 | 0.53 | 0.13 | 3.46 |
| Material | Cement | Fly ash | Fine aggregate | Coarse aggregate | Water | Water reducer | Water-cement ratio |
|---|---|---|---|---|---|---|---|
| Mix proportion/(kg·m-3) | 338 | 60 | 814 | 1 037 | 171 | 3.98 | 0.51 |
表2 C30混凝土的配合比
Table 2 Mix proportion of C30 concrete
| Material | Cement | Fly ash | Fine aggregate | Coarse aggregate | Water | Water reducer | Water-cement ratio |
|---|---|---|---|---|---|---|---|
| Mix proportion/(kg·m-3) | 338 | 60 | 814 | 1 037 | 171 | 3.98 | 0.51 |
| Level | A(self-weight height)/m | B(curing temperature)/℃ | C(curing age)/d | Empty column |
|---|---|---|---|---|
| 1 | 10 | 10 | 1 | 1 |
| 2 | 15 | 15 | 2 | 2 |
| 3 | 20 | 20 | 3 | 3 |
| 4 | 25 | 25 | 7 | 4 |
表3 正交试验因素水平
Table 3 Orthogonal test factor level
| Level | A(self-weight height)/m | B(curing temperature)/℃ | C(curing age)/d | Empty column |
|---|---|---|---|---|
| 1 | 10 | 10 | 1 | 1 |
| 2 | 15 | 15 | 2 | 2 |
| 3 | 20 | 20 | 3 | 3 |
| 4 | 25 | 25 | 7 | 4 |
| Parameter | Self-weight height | Curing temperature | Curing age | Empty column |
|---|---|---|---|---|
| K1 | 113.6 | 95.0 | 50.9 | 114.2 |
| K2 | 121.5 | 108.8 | 118.2 | 114.5 |
| K3 | 117.2 | 123.6 | 136.6 | 118.3 |
| K4 | 119.1 | 144.0 | 165.7 | 124.4 |
| k1 | 28.4 | 23.8 | 12.7 | 28.6 |
| k2 | 30.4 | 27.2 | 29.6 | 28.6 |
| k3 | 29.3 | 30.9 | 34.2 | 29.6 |
| k4 | 29.8 | 36.0 | 41.4 | 31.1 |
| R | 2.0 | 12.2 | 28.7 | 3.5 |
表4 极差分析
Table 4 Range analysis
| Parameter | Self-weight height | Curing temperature | Curing age | Empty column |
|---|---|---|---|---|
| K1 | 113.6 | 95.0 | 50.9 | 114.2 |
| K2 | 121.5 | 108.8 | 118.2 | 114.5 |
| K3 | 117.2 | 123.6 | 136.6 | 118.3 |
| K4 | 119.1 | 144.0 | 165.7 | 124.4 |
| k1 | 28.4 | 23.8 | 12.7 | 28.6 |
| k2 | 30.4 | 27.2 | 29.6 | 28.6 |
| k3 | 29.3 | 30.9 | 34.2 | 29.6 |
| k4 | 29.8 | 36.0 | 41.4 | 31.1 |
| R | 2.0 | 12.2 | 28.7 | 3.5 |
| Source of variation | Sun of square | Degree of freedom | Mean square | F | F threshold value | Significance |
|---|---|---|---|---|---|---|
| Factor A | 8.343 | 3 | 2.781 | 0.46 | F0.01(3,3)=23.46 F0.05(3,3)=9.28 | |
| Factor B | 330.227 | 3 | 110.076 | 18.202 | * | |
| Factor C | 1 780.903 | 3 | 593.634 | 98.162 | ** | |
| Standard error | 36.285 | 6 | 6.048 | |||
| Total sum of square | 2 155.758 |
表5 方差分析
Table 5 Variance analysis
| Source of variation | Sun of square | Degree of freedom | Mean square | F | F threshold value | Significance |
|---|---|---|---|---|---|---|
| Factor A | 8.343 | 3 | 2.781 | 0.46 | F0.01(3,3)=23.46 F0.05(3,3)=9.28 | |
| Factor B | 330.227 | 3 | 110.076 | 18.202 | * | |
| Factor C | 1 780.903 | 3 | 593.634 | 98.162 | ** | |
| Standard error | 36.285 | 6 | 6.048 | |||
| Total sum of square | 2 155.758 |
| M/(℃∙d) | Measured value/MPa | Predicted value/MPa | Relative error/% |
|---|---|---|---|
| 30 | 13.24 | 13.77 | 3.89 |
| 60 | 24.86 | 23.26 | 6.84 |
| 90 | 28.44 | 27.71 | 2.64 |
| 210 | 32.50 | 33.83 | 3.94 |
表6 早期抗压强度预测模型的精度验证
Table 6 Accuracy verification of early compressive strength prediction model
| M/(℃∙d) | Measured value/MPa | Predicted value/MPa | Relative error/% |
|---|---|---|---|
| 30 | 13.24 | 13.77 | 3.89 |
| 60 | 24.86 | 23.26 | 6.84 |
| 90 | 28.44 | 27.71 | 2.64 |
| 210 | 32.50 | 33.83 | 3.94 |
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