Channel deep suppressing foot fast construction method

Abstract

The invention provides a channel deep suppressing foot fast construction method. The method includes the following steps that firstly, suppressing foot side boundary surveying and paying-off are conducted; secondly, a pilot groove is excavated; thirdly, suppressing foot pile position setting out is conducted; fourthly, primary stirring and sinking are conducted, stirring and sinking are only conducted to the design depth, and soil is loosened; fifthly, primary grouting, stirring and lifting are conducted, grouting is conducted from bottom to top, stirring is conducted at the same time, the field soil and cement paste are primary mixed, and part of the total grout spraying amount is completed; sixthly, secondary stirring and sinking are conducted, and the fourth step is repeated; seventhly,secondary grouting, stirring and lifting are conducted, the fifth step is repeated, and the whole total grout spraying amount is completed; and eighthly, the fourth step, the fifth step, the sixth step and the seventh step are repeated, the subsequent pile position work is completed. By the adoption of the method, unprotected open cut excavation work is effectively avoided, the technology is simplified, the cost is saved, the construction period is shortened, construction is safe, the structural strength is ensured, the requirement for the soil of a work area is extremely low, adaptability ishigh, and the method is worthy of being applied and popularized.

Description

technical field [0001] The invention relates to a construction method for canal protection, in particular to a rapid construction method for deep canal foot protection. Background technique [0002] In the construction of large-scale canals, in order to save investment, only the slope of the soil channel is lined, and the bottom of the canal is not lined. In order to meet the needs of anti-scouring channels, these large soil channels without lining at the bottom of the channel are designed with concrete footholds at the two inner slope feet of the channel. The width of the footholds is generally about 50cm to 60cm, and the depth is generally 100cm to 200cm. , see attached figure 1 . [0003] When the channel is located in an area with no groundwater and good self-stability, the town foot can be excavated according to the design shape without sloping, and then poured concrete. [0004] However, if the bottom of the channel is below the groundwater level and is sandy or sil...

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Problems solved by technology

[0004] However, if the bottom of the channel is below the groundwater level and is sandy or silty soil with poor self-stability, even if precipitation measures are taken, it is difficult to excavate the foot of the town according to the designed shape, and it is often necessary to excavate on a slope, and then Installation of internal and external formwork, pouring concrete, equal strength of concrete, removal of formwork, backfilling and compaction of over-excavated parts, and then the construction of canal slope protection can be carried out. The whole construction process is long, long-term, and costly. Moreover, due to the small backfilling of the working space The structural stability of the soil is not guaranteed, see attached figure 2

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