A method of forming a water-blocking diaphragm wall with row piles and plug-in pile-plate combined support

Abstract

The invention discloses a campshed and inserted piled slab combined supporting water-plugging continuous wall forming construction method. The construction method particularly comprises the following construction methods: a campshed and inserted cement soil piled slab combined supporting water-plugging continuous wall forming construction method, a campshed and inserted concrete piled slab combined supporting water-plugging continuous wall forming construction method, a campshed and inserted concrete arch piled slab combined supporting water-plugging continuous wall forming construction method, and a campshed and inserted reinforced concrete arch piled slab combined supporting water-plugging continuous wall forming construction method. The campshed and inserted piled slab combined supporting water-plugging continuous wall forming construction method disclosed by the invention is small in equipment investment quantity and low in energy consumption, is cost-saving, has good structural shearing resistance and water-plugging seepage prevention performance, is short in construction period, is economic and environmental-friendly, has obvious comprehensive benefits.

Description

technical field [0001] The invention relates to a construction method of a diaphragm wall, in particular to a construction method of a continuous wall forming method for supporting water-blocking diaphragms with rows of piles inserted into pile plates, and belongs to the technical field of foundation construction engineering. Background technique [0002] With the rapid development of the national economy and infrastructure construction, the scale of foundation pit support and water-stop projects has been greatly increased. In order to save project cost and investment, and to improve the horizontal shear resistance of the support system and the anti-seepage of the water-stop structure In recent years, a large number of retaining wall support structures have been developed in China; the conventional retaining wall forms include: row pile walls, underground continuous walls, sheet pile walls, reinforced cement-soil walls, etc., row pile walls are generally cast-in-place piles, ...

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Problems solved by technology

[0002] With the rapid development of the national economy and infrastructure construction, the scale of foundation pit support and water-stop projects has been greatly increased. In order to save project cost and investment, and to improve the horizontal shear resistance of the support system and the anti-seepage of the water-stop structure In recent years, a large number of retaining wall support structures have been developed in China; the conventional retaining wall forms include: row pile walls, underground continuous walls, sheet pile walls, reinforced cement-soil walls, etc., row pile walls are generally cast-in-place piles, High-pressure rotary grouting piles are combined to form a continuous wall of piles. This method is used as a combination of support and anti-seepage. It is currently used on a large scale in domestic foundation pit support and anti-seepage projects. The investment in equipment is large and the energy consumption is high; the cement slurry loss during the construction of high-pressure rotary grouting piles is large, resulting in great waste of materials and environmental pollution; the joint construction of high-pressure jetting piles and cast-in-place piles is very strict on pile position deviation and verticality, such as Improper control often leads to quality defects at the junction of the two types of piles, which in turn affects the quality of the project. At the same time, due to the cross-construction of the two types of piles, restricted by site conditions and construction specifications, the general construction period is long, which is not conducive to the rapid development of the project. Therefore, the row pile wall has defects in terms of economy, quality, and construction period; the slab type underground diaphragm wall is the most widely used type of diaphragm wall at present. Advantages, it is currently widely used in subways, underground stations, shield and tunnel working shafts, industrial building sedimentation tanks and ultra-deep foundation pits, and has achieved good results; but the diaphragm wall has complex construction equipment, high cost, and mud pollution , Joint construction has quality defects, long construction period and other shortcomings; the existence of the slab diaphragm wall limits the popularization and utilization in the project due to the above problems; in summary, there are limitations in the selection of drilling rigs in the selection of construction equipment for pile walls and slab diaphragm walls , there are deficiencies in construction progress, quality, environmental protection, energy saving, application range, etc.; the above-mentioned construction methods need to be further innovated, improved, developed, and invented new construction methods on the basis of the original ones, so that the construction conditions and performance can be improved and enhanced. Achieve more significant social and economic benefits

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