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A kind of tree root stump lightweight retaining wall for road widening and construction method thereof

A technology for tree root stumps and retaining walls, which is applied to roads, roads, sheet pile walls, etc., can solve the problems of large construction space, low bulk density of foam light soil, many equipment processes, etc., so as to reduce the difficulty and improve the shear resistance. Effect

Active Publication Date: 2020-12-08
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cities in the south, the groundwater level is high, the bulk density of foam light soil is small, and the light soil retaining wall is easy to float, thus affecting the use of roads
In terms of construction, the filling soil on the back of the retaining wall needs to be compacted in layers, which requires a lot of equipment and complicated procedures, and requires a large construction space

Method used

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  • A kind of tree root stump lightweight retaining wall for road widening and construction method thereof
  • A kind of tree root stump lightweight retaining wall for road widening and construction method thereof
  • A kind of tree root stump lightweight retaining wall for road widening and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 with figure 2 Shown, a kind of tree root pile lightweight retaining wall that is used for single-lane road widening comprises tree root pile 3, connecting beam 2 and foam lightweight soil retaining wall 1, and connecting beam 2 is arranged on the upper end of tree root pile 3, by The reinforcement cage is made by pouring concrete to wrap the upper end of the tree root pile 3, and the connecting beam 2 is embedded in the lower part of the foam lightweight soil retaining wall 1; the tree root pile 3 is a group of grouted steel pipe piles, including many A steel pipe pile and a plurality of steel pipe piles inclined to the surroundings; the upper surface of the foam lightweight soil retaining wall 1 is flush with the roadbed 4 to be widened, and the connection with the roadbed 4 to be widened is stepped. The included angle of the inclined steel pipe pile relative to the vertical direction is not more than 45°, more preferably 20°-40°. The diameter of th...

Embodiment 2

[0050] The foam lightweight soil retaining wall adopts a wet density of 900kg / m 3 The foam lightweight soil filler, mix ratio and compressive strength are as shown in table 2, and other steps are as embodiment 1.

[0051] Table 2

[0052]

[0053] The foam is mixed with a composite foaming agent and water, and foamed by mechanical foaming. The foam density is 50Kg / m 3 . According to the proportions of various materials in Table 2, prepare cement paste in a mixer in advance, and then add a fixed mass of foam into the cement paste, mix and stir evenly, and the wet density can reach the target density.

Embodiment 3

[0055] The foam lightweight soil retaining wall adopts a wet density of 900kg / m 3 The foam lightweight soil filler, mix ratio and compressive strength are as shown in table 3, and other steps are as embodiment 1.

[0056] table 3

[0057]

[0058] The foam is mixed with a composite foaming agent and water, and foamed by mechanical foaming. The foam density is 60Kg / m 3 . According to the proportions of various materials in Table 3, prepare cement paste in a mixer in advance, and then add a fixed mass of foam into the cement paste, mix and stir evenly, and the wet density can reach the target density.

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Abstract

The invention discloses a lightweight retaining wall with tree root piles for widening single-lane roads and a construction method thereof, which comprises tree root piles, connecting beams and foam light soil retaining walls, the connecting beams are arranged at the upper end of the tree root piles, and the The reinforcement cage is made of pouring concrete to wrap the upper end of the tree root pile, and the connecting beam is embedded in the lower part of the foam lightweight soil retaining wall; the tree root pile is a group of grouted steel pipe piles, including a plurality of vertically arranged steel Pipe piles and multiple steel pipe piles arranged obliquely around; the upper surface of the foam lightweight soil retaining wall is flush with the roadbed to be widened, and the connection with the roadbed to be widened is in the shape of steps. Compared with the existing roadbed widening, the present invention reduces the length of the roadbed side slope by using the retaining wall, and the foam light soil retaining wall can be used not only as the retaining wall, but also as the roadbed of the widened part, which greatly saves the roadbed widening The occupied space is adapted to the narrow space on both sides of the road.

Description

technical field [0001] The invention belongs to the field of road subgrade widening engineering, and in particular relates to a lightweight retaining wall with tree root piles for road widening and a construction method thereof. Background technique [0002] Subgrade widening is a necessary link in the widening and reconstruction of highways at all levels. Due to the large area occupied by subgrade side slope grading, the use of retaining walls can effectively reduce the width of grading, which is conducive to saving land and reducing project costs. For the subgrade, the retaining wall is used to support the retaining body. The traditional retaining wall is generally used to support the subgrade filling or hillside soil, and prevent the filling or soil from deformation and instability. It is difficult for the retaining wall to become a part of the subgrade. And the retaining wall occupies a certain width, it is difficult to achieve the best utilization of space. The rib len...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D29/02E01C3/00E02D5/28
CPCE01C3/00E02D5/285E02D29/02
Inventor 张宏博齐晓琳万立尧葛智宋修广姚义胜王喆于锦涛
Owner SHANDONG UNIV
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