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A platform for research: civil engineering, architecture and urbanism
Deepwater area foundation pit underwater earth-rock excavation method
The invention relates to a deepwater area foundation pit underwater earth-rock excavation method, and belongs to the technical field of water conservancy projects. The deepwater area foundation pit underwater earth-rock excavation method comprises the following operation steps of dredging treatment, specifically, firstly performing surface dredging on the water bottom of an area to be excavated through a dredging ship, and enabling the dredging area to be larger than the excavated area; crushing treatment, specifically, crushing rocks in the dredged area through a percussion drill; foundationpit pre-excavation, specifically, pre-excavating the area needing to be excavated through the dredging ship to form a containing pit; and pile casing placing and excavating, specifically, placing a pile casing in the containing pit, continuously excavating earth and stones in the pile casing and at the bottom of the pile casing through the dredging ship, pressing the pile casing to the bottom of the pit after excavating for a certain depth, excavating through the dredging ship, and circulating until the pile casing sinks to the preset depth and the upper end of the pile casing is always higherthan the water surface. According to the deepwater area foundation pit underwater earth-rock excavation method, silt in water is not prone to entering the excavated foundation pit in the excavation process, and underwater excavation is smoother.
本发明涉及一种深水区基坑水下土石方开挖方法，属于水利工程技术领域，包括如下操作步骤：清淤处理：通过清淤船对所要开挖区域的水底先进行表面清淤，清淤区域大于开挖区域；破碎处理：对清淤后的区域再通过冲击钻机对该区域的岩石进行破碎处理；基坑预挖：通过挖泥船对需要开挖的区域进行预开挖形成放置坑；护筒放置开挖：在放置坑内放入护筒，通过挖泥船继续对护筒内及护筒底部的土石方继续开挖，开挖一段深度后将护筒按压至坑底，然后再通过挖泥船进行开挖，如此循环直到护筒下沉至预设深度，护筒的上端始终高出水面。该深水区基坑水下土石方开挖方法在开挖的过程中使得水中的泥沙不易进入到挖好的基坑中，使得水下开挖更为顺利。
Deepwater area foundation pit underwater earth-rock excavation method
The invention relates to a deepwater area foundation pit underwater earth-rock excavation method, and belongs to the technical field of water conservancy projects. The deepwater area foundation pit underwater earth-rock excavation method comprises the following operation steps of dredging treatment, specifically, firstly performing surface dredging on the water bottom of an area to be excavated through a dredging ship, and enabling the dredging area to be larger than the excavated area; crushing treatment, specifically, crushing rocks in the dredged area through a percussion drill; foundationpit pre-excavation, specifically, pre-excavating the area needing to be excavated through the dredging ship to form a containing pit; and pile casing placing and excavating, specifically, placing a pile casing in the containing pit, continuously excavating earth and stones in the pile casing and at the bottom of the pile casing through the dredging ship, pressing the pile casing to the bottom of the pit after excavating for a certain depth, excavating through the dredging ship, and circulating until the pile casing sinks to the preset depth and the upper end of the pile casing is always higherthan the water surface. According to the deepwater area foundation pit underwater earth-rock excavation method, silt in water is not prone to entering the excavated foundation pit in the excavation process, and underwater excavation is smoother.
本发明涉及一种深水区基坑水下土石方开挖方法，属于水利工程技术领域，包括如下操作步骤：清淤处理：通过清淤船对所要开挖区域的水底先进行表面清淤，清淤区域大于开挖区域；破碎处理：对清淤后的区域再通过冲击钻机对该区域的岩石进行破碎处理；基坑预挖：通过挖泥船对需要开挖的区域进行预开挖形成放置坑；护筒放置开挖：在放置坑内放入护筒，通过挖泥船继续对护筒内及护筒底部的土石方继续开挖，开挖一段深度后将护筒按压至坑底，然后再通过挖泥船进行开挖，如此循环直到护筒下沉至预设深度，护筒的上端始终高出水面。该深水区基坑水下土石方开挖方法在开挖的过程中使得水中的泥沙不易进入到挖好的基坑中，使得水下开挖更为顺利。
Deepwater area foundation pit underwater earth-rock excavation method
一种深水区基坑水下土石方开挖方法
FAN ZHIWANG (author) / LI MINGZHONG (author) / WU XIANMIAO (author) / ZHONG FENGCHANG (author)
2020-09-25
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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