CN110939101A

CN110939101A - Vertical dike structure and construction method thereof

Info

Publication number: CN110939101A
Application number: CN201911364900.3A
Authority: CN
Inventors: 阮龙飞; 王永庆; 张宁
Original assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Current assignee: Changjiang Institute of Survey Planning Design and Research Co Ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-03-31

Abstract

The invention discloses a vertical type dike structure, and relates to the field of hydraulic engineering. The system comprises a retaining wall positioned at the bottom of the upper pavement, a first cast-in-place pile and a second cast-in-place pile. The invention reduces the adverse effect on the surrounding constructed projects. The invention also relates to a construction method of the vertical type embankment structure.

Description

Vertical dike structure and construction method thereof

Technical Field

The invention relates to the field of hydraulic engineering, in particular to a vertical type embankment structure and a construction method thereof.

Background

When the dykes are newly built in the hydraulic engineering, the space is sometimes limited by the peripheral built engineering, the conventional slope type dyke cannot be adopted for the dyke section, and a vertical dyke structure needs to be adopted locally or on the whole line, so that the adverse effect of the newly built dykes on the peripheral built engineering is reduced. For example, a dike is newly built between two built piers, and the conventional slope dike has great adverse effect on the piers due to the stacking load of the section of the dike body.

Therefore, it is necessary to develop a vertical-type bank structure.

Disclosure of Invention

A first object of the present invention is to overcome the above-mentioned drawbacks of the background art and to provide a vertical-type embankment structure.

The second purpose of the invention is to provide a construction method of the vertical type embankment structure.

In order to achieve the first object, the technical scheme of the invention is as follows: vertical type embankment structure, its characterized in that: the construction method comprises a retaining wall positioned at the bottom of an upper pavement, a plurality of first cast-in-place piles positioned on two sides of the bottom of the retaining wall and closely arranged, and a plurality of second cast-in-place piles positioned at intervals in the middle of the bottom of the retaining wall.

In the technical scheme, the gaps among the first cast-in-place pile piles are filled with film bag concrete caulking.

In the technical scheme, the film bag concrete is 8-shaped.

In the above technical scheme, first sand is arranged between the first cast-in-place pile and the second cast-in-place pile.

In the technical scheme, the inner side of the first cast-in-place pile is provided with the impervious wall.

In the above technical scheme, the top of the first sandy soil is a grouting reinforcement layer.

In the technical scheme, the retaining wall is a U-shaped groove, and second sand is arranged in the groove.

In the technical scheme, wave walls and inner side railings are arranged on two sides of the upper road surface.

In the technical scheme, the wave wall is connected with the retaining wall.

In order to achieve the second object, the invention has the technical scheme that: the construction method of the vertical type embankment structure is characterized by comprising the following steps:

step 1: the system comprises a plurality of first cast-in-place piles which are arranged closely and a plurality of second cast-in-place piles which are arranged at intervals;

step 2: filling film bag concrete caulking in the gap between the first cast-in-place piles;

and step 3: filling first sand between the first cast-in-place pile and the second cast-in-place pile;

and 4, step 4: high-pressure swing-spraying impervious walls on the inner sides of the first cast-in-place piles;

and 5: pouring a retaining wall at the top of the first cast-in-place pile and the second cast-in-place pile, and compacting, grouting and reinforcing the first sandy soil surface layer through grouting holes in a retaining wall bottom plate to form a grouting reinforcing layer;

step 6: and backfilling second sandy soil in the retaining wall, and arranging an upper road surface, a wave wall and an inner side railing to finish construction.

The invention reduces the large section of the traditional slope embankment into a vertical embankment section structure with the width less than 10m, occupies small space, limits the upper load of the vertical embankment within the width range of the embankment body, and does not increase horizontal load to the peripheral soil body through the digestion of the pile foundation so as to reduce the adverse effect on the peripheral built engineering.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic plan view of the present invention.

Fig. 3 is a schematic structural view of a first cast-in-place pile and a membrane bag concrete according to the present invention.

Fig. 4 is a schematic structural view of a diaphragm wall and a first cast-in-place pile according to the present invention.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be apparent and readily appreciated by the description.

With reference to the accompanying drawings: the vertical type embankment structure comprises a retaining wall 2 positioned at the bottom of an upper pavement 1, a plurality of first cast-in-place piles 31 positioned at two sides of the bottom of the retaining wall 2 and closely arranged, and a plurality of second cast-in-place piles 32 positioned at the bottom of the retaining wall 2 and arranged at intervals;

and the gaps among the first cast-in-place piles 31 are filled with film bag concrete 33 caulking.

The film bag concrete 33 is 8-shaped.

First sand 34 is arranged between the first cast-in-place pile 31 and the second cast-in-place pile 32.

The first cast-in-place pile 31 has an impervious wall 35 on the inner side.

The top of the first sandy soil 34 is a grouting reinforcement layer 341.

The retaining wall 2 is a U-shaped groove, second sand 21 is arranged in the groove, and a grouting hole is formed in the bottom plate; the retaining wall 2 is an upper bearing and lower bearing pivot of the embankment structure and is made of reinforced concrete.

Wave walls 11 and inner side railings 12 are arranged on two sides of the upper pavement 1.

The wave wall 11 is connected with the retaining wall 2.

The construction method of the vertical type embankment structure comprises the following steps:

step 1: firstly, combining a plurality of first cast-in-place piles 31 closely arranged in topographic and geological conditions and a plurality of second cast-in-place piles 32 arranged at intervals; due to the construction sleeve of the water cast-in-place pile, a gap of 10cm at the minimum position is inevitably generated between the piles of the first cast-in-place pile 31.

Step 2: after the pile foundation construction is finished and the design strength is reached, filling film bag concrete 33 into gaps among the first cast-in-place piles 31 for caulking, wherein the film bag concrete 33 is 8-shaped, and the two ends of the film bag concrete are large and the middle of the film bag concrete is small so as to be better embedded into the gaps among the first cast-in-place piles 31;

and step 3: after the gaps between the first cast-in-place piles 31 are filled, first sandy soil 34 is filled between the first cast-in-place piles 31 and the second cast-in-place piles 32 in a blowing mode;

and 4, step 4: after the first sandy soil 34 is solidified, implementing a high-pressure swing-spraying impervious wall 35 on the inner side of the first cast-in-place pile 31, and specially adjusting a swing-spraying angle, so that gaps among the first cast-in-place piles 31 can be filled and blocked, and a closed impervious wall body can be formed;

and 5: pouring the retaining wall 2 on the top of the first cast-in-place pile 31 and the second cast-in-place pile 32, and performing compaction grouting reinforcement on the surface layer of the first sandy soil 34 through grouting holes in the bottom plate of the retaining wall 2 to form a grouting reinforcement layer 341;

step 6: and backfilling second sandy soil 21 in the retaining wall 2, and arranging the upper pavement 1, the wave wall 11 and the inner side railing 12 to finish construction.

In practical use, the invention reduces the large section of the traditional slope-type embankment into a vertical embankment section structure with the width less than 10 m; the method can be used for slope dikes with large cross sections and without enough slope-releasing cross-section space, and can also be used for places with strict control requirements on the influence of the load of the dikes on the built buildings, such as the crossing places of newly-built dikes under the built river-crossing bridge.

Other parts not described belong to the prior art.

Claims

1. Vertical type embankment structure, its characterized in that: the construction method comprises a retaining wall (2) located at the bottom of an upper portion pavement (1), a plurality of first cast-in-place piles (31) located on two sides of the bottom of the retaining wall (2) and closely arranged, and a plurality of second cast-in-place piles (32) located at the bottom of the retaining wall (2) and arranged at intervals.

2. An upright-type embankment structure according to claim 1, wherein: and gaps among the first cast-in-place piles (31) are filled with film bag concrete (33) caulking.

3. An upright-type embankment structure according to claim 2, wherein: the film bag concrete (33) is 8-shaped.

4. An upright-type embankment structure according to claim 3, wherein: and first sand (34) is arranged between the first cast-in-place pile (31) and the second cast-in-place pile (32).

5. An upright-type embankment structure according to claim 4, wherein: and the inner side of the first cast-in-place pile (31) is provided with a seepage-proofing wall (35).

6. An upright-type embankment structure according to claim 5, wherein: the top of the first sandy soil (34) is provided with a grouting reinforcement layer (341).

7. An upright-type embankment structure according to claim 5 or 6, wherein: the retaining wall (2) is a U-shaped groove, and second sand (21) is arranged in the groove.

8. An upright-type embankment structure according to claim 7, wherein: wave walls (11) and inner side railings (12) are arranged on two sides of the upper pavement (1).

9. An upright-type embankment structure according to claim 8, wherein: the wave wall (11) is connected with the retaining wall (2).

10. A method of constructing an upright-type embankment structure according to any one of claims 1 to 9, wherein the method comprises the steps of:

step 1: a plurality of first filling piles (31) which are arranged closely, and a plurality of second filling piles (32) which are arranged at intervals;

step 2: filling film bag concrete (33) in gaps among the first cast-in-place piles (31) for caulking;

and step 3: filling first sand (34) between the first cast-in-place pile (31) and the second cast-in-place pile (32);

and 4, step 4: a high-pressure swing-spraying impervious wall (35) at the inner side of the first cast-in-place pile (31);

and 5: pouring a retaining wall (2) at the tops of the first cast-in-place pile (31) and the second cast-in-place pile (32), and compacting, grouting and reinforcing the surface layer of the first sand (34) through grouting holes in the bottom plate of the retaining wall (2) to form a grouting reinforcing layer (341);

step 6: and backfilling second sandy soil (21) in the retaining wall (2), and arranging an upper pavement (1), a wave wall (11) and an inner side railing (12) to finish construction.