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A platform for research: civil engineering, architecture and urbanism
Double-layer confined water sand soil stratum rotary excavating cast-in-place pile counter bore method
The invention relates to the technical field of constructional engineering, and particularly discloses a double-layer confined water sand soil stratum rotary excavating cast-in-place pile counter bore method which specifically comprises the following steps: S1, geological and hydrological exploration; s2, determining the depth, thickness and pressure of the confined water layer; s3, according to the dewatering and drainage scheme, decompression wells and drainage wells are arranged; s4, according to the soil layer data obtained in the step S1, the specific gravity range of the wall protection slurry is determined, and the height h of the wall protection slurry is obtained; according to the height h of the wall protection slurry, whether the pressure of the wall protection slurry can press the confined water head or not is judged; s5, if the cofferdam cannot be pressed, the filling height of the cofferdam is calculated according to the pressure of the confined water head and the specific gravity of the retaining wall slurry; s6, a cofferdam is designed and constructed, and a soil layer is tamped; and S7, pile foundation drilling construction is conducted. According to the method, when the pressure of a confined water layer is too large or multiple layers of confined water are encountered, the pile forming quality under the double-layer confined water sandy soil stratum is improved, the construction difficulty is reduced, and the construction cost is saved.
本发明涉及建筑工程技术领域，具体公开了一种双层承压水砂土地层旋挖灌注桩沉孔方法，具体包括以下步骤：步骤S1：地质、水文勘探；步骤S2：确定承压水层深度、厚度、压力；步骤S3：根据降排水方案，布置减压井、疏干井；步骤S4：根据步骤S1获得土层数据，确定护壁泥浆比重范围，获得护壁泥浆高度h；根据护壁泥浆高度h，判断护壁泥浆的压力是否能压住承压水头；步骤S5：若压不住，则根据承压水头压力、护壁泥浆比重计算围堰填筑高度；步骤S6：围堰设计、施工、土层夯实；步骤S7：桩基钻孔施工。本发明解决了承压水层压力过大或遇多层承压水时，提高了双层承压水砂土地层下的成桩质量，降低了施工难度，节约了施工成本。
Double-layer confined water sand soil stratum rotary excavating cast-in-place pile counter bore method
The invention relates to the technical field of constructional engineering, and particularly discloses a double-layer confined water sand soil stratum rotary excavating cast-in-place pile counter bore method which specifically comprises the following steps: S1, geological and hydrological exploration; s2, determining the depth, thickness and pressure of the confined water layer; s3, according to the dewatering and drainage scheme, decompression wells and drainage wells are arranged; s4, according to the soil layer data obtained in the step S1, the specific gravity range of the wall protection slurry is determined, and the height h of the wall protection slurry is obtained; according to the height h of the wall protection slurry, whether the pressure of the wall protection slurry can press the confined water head or not is judged; s5, if the cofferdam cannot be pressed, the filling height of the cofferdam is calculated according to the pressure of the confined water head and the specific gravity of the retaining wall slurry; s6, a cofferdam is designed and constructed, and a soil layer is tamped; and S7, pile foundation drilling construction is conducted. According to the method, when the pressure of a confined water layer is too large or multiple layers of confined water are encountered, the pile forming quality under the double-layer confined water sandy soil stratum is improved, the construction difficulty is reduced, and the construction cost is saved.
本发明涉及建筑工程技术领域，具体公开了一种双层承压水砂土地层旋挖灌注桩沉孔方法，具体包括以下步骤：步骤S1：地质、水文勘探；步骤S2：确定承压水层深度、厚度、压力；步骤S3：根据降排水方案，布置减压井、疏干井；步骤S4：根据步骤S1获得土层数据，确定护壁泥浆比重范围，获得护壁泥浆高度h；根据护壁泥浆高度h，判断护壁泥浆的压力是否能压住承压水头；步骤S5：若压不住，则根据承压水头压力、护壁泥浆比重计算围堰填筑高度；步骤S6：围堰设计、施工、土层夯实；步骤S7：桩基钻孔施工。本发明解决了承压水层压力过大或遇多层承压水时，提高了双层承压水砂土地层下的成桩质量，降低了施工难度，节约了施工成本。
Double-layer confined water sand soil stratum rotary excavating cast-in-place pile counter bore method
一种双层承压水砂土地层旋挖灌注桩沉孔方法
FENG HAO (author) / WANG RONGZHEN (author) / YAO BO (author) / LI QIBING (author) / YANG DONGZE (author) / YANG SHAOJUN (author) / LUO LIFU (author) / LI JI (author) / YAO PING (author) / ZHANG HONG (author)
2024-11-29
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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