Drainage structure for accelerating consolidation of sludge soil dredged body of dam engineering and construction method thereof

Abstract

The invention discloses a drainage structure for accelerating consolidation of a sludge soil dredged body of dam engineering and a construction method thereof. The drainage structure comprises a polder dyke, a levee, a sludge soil dredged area between the polder dyke and the levee, and a drainage channel formed in the sludge soil dredged area. The drainage channel comprises a plurality of drainageblind ditches which are horizontally located in the bottom of the sludge soil dredged area, and a plurality of drainage sand wells vertically arranged in the sludge soil dredged area, and the drainage blind ditches are used for bearing water flowing into or seeping from the drainage sand wells. By adopting the technical scheme, compared with the prior art, the drainage structure has the followingadvantages that the horizontal drainage blind ditches and the vertical drainage sand wells are arranged at the bottom of the sludge soil dredged area to form the three-dimensional drainage channel, the drainage capacity is greatly enhanced, pore water pressure dissipation is accelerated, soil effective stress is improved, and soil consolidation is accelerated.

Description

technical field

[0001] The invention relates to the field of building construction, in particular to a drainage structure and a construction method for accelerating the consolidation of silt back bodies in silt discharge and embankment consolidation projects. Background technique

[0002] The key technology of standardized embankment construction is to use silt release to strengthen the embankment to thicken the embankment, so as to strengthen the embankment along the river. Desilting and embankment consolidation is to extract river and river water and sand through artesian water diversion or mechanically, and transport them to the river side of the embankment through channels or pipelines. After sedimentation and silting, clear water is removed, and then dehydration and consolidation are performed to thicken the embankment or raise the ground to the water surface. Submerged above the treatment elevation to meet flood control requirements.

[0003] However, in some embankme...

Examples

Embodiment 1

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0049] Such as figure 1 As shown, a drainage structure to speed up the consolidation of the silt body in the silt discharge and embankment consolidation project includes a dike 1, a levee 2, a silt back area 3 between the dike 1 and the levee 2, and a drainage system arranged in the silt back area 3 The drainage channel includes a plurality of drainage blind ditches 4 arranged horizontally at the bottom of the silt area, and a plurality of drainage sand wells 5 arranged vertically in the silt area 3 .

[0050] Such as Figure 2-Figure 5 As mentioned above, the blind drainage ditch 4 includes a main blind drainage ditch 41 and a secondary blind drainage ditch 42; the main blind drainage ditch 41 includes a main perforated pipe 411, a main drainage pebble layer 412, a main drainage nonwoven Cloth layer 413 and main drainage coarse sand layer 414, secondary dr...

Embodiment 2

[0054] Such as Figure 7 As shown, the thickness of the silt back body is thicker, and the construction is divided into two phases. The drainage channel is provided with upper and lower layers, and the distance between the two layers of drainage channels is 3m. The rest of the structure of this embodiment is the same as that of Embodiment 1.

[0055] The drainage system includes vertical drainage system and horizontal drainage system.

[0056] The vertical drainage system is a bagged sand well with a diameter of 7cm, and the design spacing is 1.0m to 1.5m; the sand well is an ideal artificial vertical drainage and decompression channel, and the ultra-static pore water in the soil must be discharged to the ground along the drainage channel .

[0057] According to the actual situation of the project, if the silt back area is thicker, it can be constructed in stages, and the thickness of each layer in each stage is 3m~6m; because the thickness of each layer is not thick, the ver...

technical field

[0001] The invention relates to the field of building construction, in particular to a drainage structure and a construction method for accelerating the consolidation of silt back bodies in silt discharge and embankment consolidation projects. Background technique

[0002] The key technology of standardized embankment construction is to use silt release to strengthen the embankment to thicken the embankment, so as to strengthen the embankment along the river. Desilting and embankment consolidation is to extract river and river water and sand through artesian water diversion or mechanically, and transport them to the river side of the embankment through channels or pipelines. After sedimentation and silting, clear water is removed, and then dehydration and consolidation are performed to thicken the embankment or raise the ground to the water surface. Submerged above the treatment elevation to meet flood control requirements.

[0003] However, in some embankme...

Examples

Embodiment 1

[0048] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0049] Such as figure 1 As shown, a drainage structure to speed up the consolidation of the silt body in the silt discharge and embankment consolidation project includes a dike 1, a levee 2, a silt back area 3 between the dike 1 and the levee 2, and a drainage system arranged in the silt back area 3 The drainage channel includes a plurality of drainage blind ditches 4 arranged horizontally at the bottom of the silt area, and a plurality of drainage sand wells 5 arranged vertically in the silt area 3 .

[0050] Such as Figure 2-Figure 5 As mentioned above, the blind drainage ditch 4 includes a main blind drainage ditch 41 and a secondary blind drainage ditch 42; the main blind drainage ditch 41 includes a main perforated pipe 411, a main drainage pebble layer 412, a main drainage nonwoven Cloth layer 413 and main drainage coarse sand layer 414, secondary dr...

Embodiment 2

[0054] Such as Figure 7 As shown, the thickness of the silt back body is thicker, and the construction is divided into two phases. The drainage channel is provided with upper and lower layers, and the distance between the two layers of drainage channels is 3m. The rest of the structure of this embodiment is the same as that of Embodiment 1.

[0055] The drainage system includes vertical drainage system and horizontal drainage system.

[0056] The vertical drainage system is a bagged sand well with a diameter of 7cm, and the design spacing is 1.0m to 1.5m; the sand well is an ideal artificial vertical drainage and decompression channel, and the ultra-static pore water in the soil must be discharged to the ground along the drainage channel .

[0057] According to the actual situation of the project, if the silt back area is thicker, it can be constructed in stages, and the thickness of each layer in each stage is 3m~6m; because the thickness of each layer is not thick, the ver...

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