Negative-pressure three-dimensional flow-guiding disturbance impact solidification dredger filling method

Abstract

The invention discloses a negative-pressure three-dimensional flow-guiding disturbance impact solidification dredger filling method. The negative-pressure three-dimensional flow-guiding disturbance impact solidification dredger filling method mainly comprises the steps that a dredger fill area is cleaned and flattened; a ditch is horizontally formed in the dredger area or a horizontal water seepage pipe is arranged by inclining by 0.5-5 degrees, and backfilling is conducted through medium and rough sand-gravel aggregate; a dam and a drainage canal are constructed on the periphery of the dredger fill area, and a water diversion pipe and an automatic-flowing drainage pipe are pre-buried; a dredger fill pipeline is led into the dredger fill area in the dam; slurry is guided into the surface layer of the dredger fill area and underground water is guided into the drainage canal after silt deposits; a water suction pump is connected to the outer port of the drainage pipe, and then forced drainage is conducted. Meanwhile, the invention creatively provides a suspension controllable dredger fill area drainage device, a movable multifunctional integrated well tube draining and vibrating-flushing device and technologies matched with the suspension controllable dredger fill area drainage device and the movable multifunctional integrated well tube draining and vibrating-flushing device. Compared with the prior art, the reinforcing period can be shorted by about 50% and the comprehensive unit cost can be reduced by about 45% under the same condition, and the bearing capacity of a fill stratum within the overall depth range can reach 60-80 kPa after treatment.

Description

technical field [0001] The invention relates to the field of dredging fill consolidation treatment methods, in particular to a negative pressure three-dimensional diversion disturbance impact consolidation dredging fill method. Background technique [0002] In order to alleviate the contradiction between the accelerated urbanization process and the increasingly scarce land resources, the use of silt from coastal areas, rivers, rivers, and lakes for cofferdam land reclamation, as well as land reclamation using the bottom of abandoned depressions or tidal flats, has become an important way to increase construction land and save ecology. effective way to use land. In particular, the combination of dredging and land reclamation for coastal areas, rivers, lakes and lakes is currently a win-win approach implemented in various places. Using dredged soil for land reclamation can expand and improve human living space, enhance and beautify the urban environment, and improve the compre...

AI Technical Summary

Problems solved by technology

This method plays a certain positive role in solving the problems existing in the prior art. However, since it only adopts the special pipe for horizontal water collection buried at the bottom, as the filling height increases, the single horizontal water collection pipe layout at the bottom will lead to a faster water collection speed. Slow, long cycle, poor effect, once the pipeline is clogged, it will directly lead to technical failure

Although the present invention provides the technical enlightenment of using vibro-construction equipment to carry out high-frequency vibro-construction on the surface layer of dredged fill soil, it lacks the necessary technical support, because the so-called vibro-construction equipment cannot enter the site at all in the early mud state after filling, so This method is also limited to the surface layer with a certain hardness formed after natural settlement, but the deep layer is still difficult to consolidate

In this case, the backfill (dry fill) dredged soil is covered on the original soft soil, so that the site forms an obvious dual structure of soil covering the underlying soft soil, thus bringing new aspects to the foundation treatment of the site. Difficult; after the construction of this method, the soft soil foundation of the site has high water content, high compressibility, and poor permeability, and it is impossible to use it for construction in the short term. Before the construction of the construction project, the foundation must be reinforced as needed. , to improve the strength, bearing capacity and stability of the soft soil foundation, so this method is not suitable for the reinforcement of dredger fill with a large thickness (≧2m), and there are still problems of long settlement time and low efficiency in general

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