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A platform for research: civil engineering, architecture and urbanism
Variable cross-section pile for karst development site and construction method of variable cross-section pile
The invention discloses a variable cross-section pile for a karst development site and a construction method of the variable cross-section pile. The variable cross-section pile structurally comprises an upper-section cast-in-place pile and a lower-section precast pile. The upper-section cast-in-place pile and the lower-section precast pile are arranged in the drill hole; the drilled hole comprises a prefabricated section arranged in a rock stratum and a pouring section arranged in a soil layer; the upper-section cast-in-place pile is cast in the cast-in-place section; the lower-section precast pile is accommodated in the precast section; the aperture of the pouring section is larger than that of the prefabricated section; and the lower precast pile section extends into the pouring section and is connected with the upper precast pile section. According to the structure, the lower-section precast pile is arranged in the rock stratum section and penetrates through the karst cave section, the air bags are arranged on the upper portion and the lower portion of the karst cave section correspondingly, effective sealing of the karst cave section is achieved, grouting is prevented from seeping out of the karst cave section, and meanwhile reliable stress is obtained by means of the fact that the diameter of the upper-section cast-in-place pile is larger than that of the lower-section precast pile; and normal use of the precast pile in the lower-section precast pile is ensured.
本申请公开了一种用于岩溶发育场地的变截面桩及其施工方法，该结构包括：上段灌注桩与下段预制桩；上段灌注桩与下段预制桩设置于钻孔内；钻孔包括：设置于岩层内的预制段、设置于土层内的灌注段；上段灌注桩浇筑设置于灌注段内；下段预制桩容纳设置于预制段内；灌注段的孔径大于预制段的孔径；下段预制桩伸入灌注段内并与上段灌注桩连接。该结构通过在岩层段内设置下段预制桩，下段预制桩穿过溶洞段设置并在溶洞段上、下方分别设置气囊实现对溶洞段的有效封闭防止灌浆从溶洞段渗出，同时利用上段灌注桩直径大于下段预制桩直径，获得可靠受力的同时，保证预制桩在下段预制桩内的正常使用。
Variable cross-section pile for karst development site and construction method of variable cross-section pile
The invention discloses a variable cross-section pile for a karst development site and a construction method of the variable cross-section pile. The variable cross-section pile structurally comprises an upper-section cast-in-place pile and a lower-section precast pile. The upper-section cast-in-place pile and the lower-section precast pile are arranged in the drill hole; the drilled hole comprises a prefabricated section arranged in a rock stratum and a pouring section arranged in a soil layer; the upper-section cast-in-place pile is cast in the cast-in-place section; the lower-section precast pile is accommodated in the precast section; the aperture of the pouring section is larger than that of the prefabricated section; and the lower precast pile section extends into the pouring section and is connected with the upper precast pile section. According to the structure, the lower-section precast pile is arranged in the rock stratum section and penetrates through the karst cave section, the air bags are arranged on the upper portion and the lower portion of the karst cave section correspondingly, effective sealing of the karst cave section is achieved, grouting is prevented from seeping out of the karst cave section, and meanwhile reliable stress is obtained by means of the fact that the diameter of the upper-section cast-in-place pile is larger than that of the lower-section precast pile; and normal use of the precast pile in the lower-section precast pile is ensured.
本申请公开了一种用于岩溶发育场地的变截面桩及其施工方法，该结构包括：上段灌注桩与下段预制桩；上段灌注桩与下段预制桩设置于钻孔内；钻孔包括：设置于岩层内的预制段、设置于土层内的灌注段；上段灌注桩浇筑设置于灌注段内；下段预制桩容纳设置于预制段内；灌注段的孔径大于预制段的孔径；下段预制桩伸入灌注段内并与上段灌注桩连接。该结构通过在岩层段内设置下段预制桩，下段预制桩穿过溶洞段设置并在溶洞段上、下方分别设置气囊实现对溶洞段的有效封闭防止灌浆从溶洞段渗出，同时利用上段灌注桩直径大于下段预制桩直径，获得可靠受力的同时，保证预制桩在下段预制桩内的正常使用。
Variable cross-section pile for karst development site and construction method of variable cross-section pile
用于岩溶发育场地的变截面桩及其施工方法
CHEN LIN (author) / CHEN SHUCUN (author) / CUI MEIHUA (author) / LI XIAOBANG (author) / LIU MINGMING (author) / GAO RU (author) / MA HANNING (author)
2024-10-22
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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