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A platform for research: civil engineering, architecture and urbanism
Mud soil rock-filled roadbed open caisson construction method
The invention relates to the technical field of open caisson construction, and particularly discloses a mucky soil rock-filled roadbed open caisson construction method which comprises the following steps: step 1, surveying and setting out: step 2, excavating a foundation pit slope at the sinking part of an open caisson; thirdly, dewatering and drainage are conducted in the foundation pit; fourthly, high-pressure jet grouting pile construction is conducted at the bottom of the well wall of the open caisson; and fifthly, open caisson construction is conducted. Compared with the prior art, the upper portion of the foundation pit is sloped, the safety of the foundation pit is effectively improved, and the risk of soil wall collapse is reduced; the extrusion of mountain field gravels to sludge is relieved, the sinking stability of the open caisson is improved, the high-pressure jet grouting piles are matched with the bottom of the well wall for foundation treatment, the problems of poor sludge bearing capacity and the like are effectively solved, the sinking construction accuracy of the open caisson is improved, and the problems of partial sinking, super sinking and the like are avoided; and the stability of the foundation can be improved, and the safety of the construction process is guaranteed.
本发明涉及沉井施工技术领域，具体公开了一种淤泥质土填石路基沉井施工方法，包括以下步骤：步骤一，测量放样：步骤二，在沉井下沉处，开挖基坑放坡；步骤三，基坑内降排水；步骤四，在沉井井壁底部进行高压旋喷桩施工；步骤五，沉井施工。与现有技术相比，基坑上部采用放坡有效提升了基坑的安全性，降低了土壁塌方的风险；减轻了山场碎石对淤泥的挤压，提升了沉井下沉的稳定性，配合井壁底采用高压旋喷桩进行地基处理，有效地解决了淤泥承载力差等问题，提高了沉井下沉施工的准确度，避免出现偏沉、超沉等问题；并且能够提高地基的稳定性，保证了施工过程的安全。
Mud soil rock-filled roadbed open caisson construction method
The invention relates to the technical field of open caisson construction, and particularly discloses a mucky soil rock-filled roadbed open caisson construction method which comprises the following steps: step 1, surveying and setting out: step 2, excavating a foundation pit slope at the sinking part of an open caisson; thirdly, dewatering and drainage are conducted in the foundation pit; fourthly, high-pressure jet grouting pile construction is conducted at the bottom of the well wall of the open caisson; and fifthly, open caisson construction is conducted. Compared with the prior art, the upper portion of the foundation pit is sloped, the safety of the foundation pit is effectively improved, and the risk of soil wall collapse is reduced; the extrusion of mountain field gravels to sludge is relieved, the sinking stability of the open caisson is improved, the high-pressure jet grouting piles are matched with the bottom of the well wall for foundation treatment, the problems of poor sludge bearing capacity and the like are effectively solved, the sinking construction accuracy of the open caisson is improved, and the problems of partial sinking, super sinking and the like are avoided; and the stability of the foundation can be improved, and the safety of the construction process is guaranteed.
本发明涉及沉井施工技术领域，具体公开了一种淤泥质土填石路基沉井施工方法，包括以下步骤：步骤一，测量放样：步骤二，在沉井下沉处，开挖基坑放坡；步骤三，基坑内降排水；步骤四，在沉井井壁底部进行高压旋喷桩施工；步骤五，沉井施工。与现有技术相比，基坑上部采用放坡有效提升了基坑的安全性，降低了土壁塌方的风险；减轻了山场碎石对淤泥的挤压，提升了沉井下沉的稳定性，配合井壁底采用高压旋喷桩进行地基处理，有效地解决了淤泥承载力差等问题，提高了沉井下沉施工的准确度，避免出现偏沉、超沉等问题；并且能够提高地基的稳定性，保证了施工过程的安全。
Mud soil rock-filled roadbed open caisson construction method
一种淤泥质土填石路基沉井施工方法
HUANG JIAPING (author) / XU GUO (author) / XU YONG (author) / QU CHUANZHEN (author) / WANG JIANJUN (author) / SUN HUANYU (author)
2023-03-07
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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