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Construction method of underground continuous wall with water-rich karst development geology and grouting wall structure

An underground diaphragm wall and construction method technology, which is applied in the direction of foundation structure engineering, excavation, sheet pile walls, etc., can solve problems such as collapsed holes and affect the quality of groove formation, and achieve the effect of improving construction quality

Pending Publication Date: 2020-03-24
广州珠江建设发展有限公司
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Problems solved by technology

However, when the underground diaphragm wall is constructed under the geological conditions of water-rich karst development, it is easy to collapse the hole due to the loss of mud in the trench construction due to karst caves and abundant groundwater flow, or affect the quality of the trench due to the loss of cement slurry

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  • Construction method of underground continuous wall with water-rich karst development geology and grouting wall structure
  • Construction method of underground continuous wall with water-rich karst development geology and grouting wall structure
  • Construction method of underground continuous wall with water-rich karst development geology and grouting wall structure

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Embodiment Construction

[0045] see Figure 1 to Figure 5 The construction method of the underground diaphragm wall of the water-rich karst development geology of the present embodiment comprises the following steps,

[0046] Step 1: According to the geological survey data, carry out intensive supplementary reconnaissance in the area where the karst development of the underground diaphragm wall is relatively strong, and construct the BIM three-dimensional geological model and the proposed underground diaphragm wall 20 model;

[0047] Specifically, under the geological condition of water-rich karst, the intensified reconnaissance shall be carried out within 10m on both sides of the proposed underground diaphragm wall area, and the average distance between the survey holes shall not exceed 5m; 10m; outside the range of 25m, the average distance between survey holes shall not exceed 15m;

[0048] Furthermore, according to the distribution of the survey holes, they are grouped, and the plane position of ...

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Abstract

The invention discloses a construction method of an underground continuous wall with water-rich karst development geology and a grouting wall structure. By constructing a BIM 3D geological model for reflecting the underground karst condition, the direction, distribution and size of a karst cave can be directly displayed, and a grouting wall is arranged on the outer side of the underground continuous wall of the water-rich karst high-development area under the guidance of the BIM 3D geological model to prevent the slurry filled in the karst cave from losing; and the geological model is used toclassify the karst cave, different filling methods are adopted, the layout of grouting points is optimized according to the different filling methods, a basis is provided for the analysis of filling coefficient and the statistics of slurry volume of the karst cave, and the construction pre-control of filling treatment of the karst cave is better achieved.

Description

technical field [0001] The invention relates to the technical field of underground diaphragm wall construction, in particular to a construction method of an underground diaphragm wall and a grout-stop wall structure for water-rich karst-developed geology. Background technique [0002] The underground diaphragm wall has the characteristics of strong geological adaptability, excellent waterproof performance, and less impact on surrounding buildings, and is widely used in foundation pit support engineering of high-rise buildings. However, when the underground diaphragm wall is grooved and constructed under the geological conditions of water-rich karst development, it is easy to collapse the hole due to the loss of mud during the groove-forming construction due to karst caves and abundant groundwater flow, or affect the quality of the groove due to the loss of cement slurry. Contents of the invention [0003] Based on this, the object of the present invention is to overcome th...

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Application Information

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IPC IPC(8): E02D5/20E02D17/04E02D15/04E02D19/18
CPCE02D5/20E02D17/04E02D15/04E02D19/18
Inventor 卜继斌廖志三叶家成潘盛欣王红波张少敏林沉
Owner 广州珠江建设发展有限公司
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