Construction technology of continuous wall on high-water-level boulder layer
A construction technology and high water level technology, applied in the direction of sheet pile wall, foundation structure engineering, foundation structure test, etc., can solve the problems of main structure support, anti-seepage bearing and soil retaining effect that cannot be excavated by subway, etc. Achieve the effect of reducing structural collapse and ensuring the quality of joints
Inactive Publication Date: 2019-10-08
THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP +1
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Problems solved by technology
At present, the traditional underground diaphragm wall construction mostly uses single-axis or multi-axis auger drilling machines to form columnar cement-soil mixing continuous walls. This columnar cement-soil mixing continuous wall is used in high-water boulder stratum structures. The main structure of the subway excavation cannot be well supported, and its anti-seepage bearing and soil retaining effect are not good
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Embodiment
[0031] Embodiment: A construction process for a diaphragm wall in a high water level boulder stratum, comprising: step S1, drilling the cutting box to a designed depth; step S2, building a cement-soil mixing wall with the TRD method; step S3, pulling out the cutting box and disassembling it.
[0032] Step S1, drilling the cutting box to the designed depth. (1) Measure and set off the wire. Before construction, according to the design drawings and the coordinate reference points provided by the owner, accurately calculate the corner point coordinates of the center line of the TRD water-stop curtain (trial wall), use the measuring instrument to stake out, and review the coordinate data, and at the same time do a good job of protection pile. And notify the relevant units to review the release line. (2) Excavate the guide groove according to the equipment weight of the TRD construction method, and after setting out the center line of the water-stop curtain (tested wall) of the T...
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The invention relates to a construction technology of a continuous wall on a high-water-level boulder layer and belongs to the technical field of subway construction. According to the technical scheme, the technology comprises the following steps: step 1, drilling a cutting box to design depth; step 2, building a cement-soil mixed wall by a TRD method: first, filling excavating liquid to excavateand loosen the soil layer for a certain distance, then carrying out excavation back to the original part, and then filling curing liquid to carry out forward propelling and mixing and form the wall; and step 3, pulling out the cutting box and carrying out disassembly. The problems that the traditional column type cement-soil mixed continuous wall cannot well support the main body structure of an excavated subway in the high-water-level boulder layer, and the seepage preventing and soil blocking effects are poor are solved. The technology can well carry out seepage preventing and soil blockingsupport on the main body of the subway construction structure.
Description
technical field [0001] The invention relates to the technical field of subway construction, in particular to a construction technique for a diaphragm wall in a high-water boulder stratum. Background technique [0002] When constructing the subway base station, it is necessary to build an underground diaphragm wall in the excavated underground structure. The underground diaphragm wall is a kind of trenching machine used on the ground for basic engineering. Along the peripheral axis of the deep excavation project, a long and narrow deep trench is excavated under the condition of mud retaining wall. After the trench is cleaned, it is hung in the trench Reinforcement cages, and then use the conduit method to pour underwater concrete to form a unit trough section. In this way, a continuous reinforced concrete wall is built underground as a water interception, anti-seepage, load-bearing, and water-retaining structure. On the ground, use some special trench digging machines to dig...
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IPC IPC(8): E02D5/18E02D33/00
CPCE02D5/187E02D33/00
Inventor 樊延祥关辉王永全王有旗朱连臣陈庆忠李苗辛柱桥
Owner THE 5TH ENG CO LTD OF CHINA RAILWAY 25TH BUREAU GRP