CN111364439A

CN111364439A - Novel vacuum preloading drain pipe and vacuum preloading construction method used by same

Info

Publication number: CN111364439A
Application number: CN202010200635.1A
Authority: CN
Inventors: 秦浩然; 张平; 谭斌; 杨胜文; 呙于平
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2020-03-20
Filing date: 2020-03-20
Publication date: 2020-07-03

Abstract

The invention relates to a novel vacuum preloading drain pipe and a vacuum preloading construction method used by the same, wherein the drain pipe comprises a drain board, the cross section of the drain board is in a cross shape, drain holes are uniformly arranged on the drain board and penetrate through the side wall of the drain board; and the permeable geotextile surrounds the periphery of the drainage plate and is fixed on the drainage plate, a plurality of filling areas are formed by the drainage plate and the permeable geotextile in a constrained manner, and the filling areas are filled with fillers which are used for increasing the structural strength and can perform coarse filtration. In the novel vacuum preloading drain pipe, the drain plate is arranged in the cylindrical permeable geotextile in a built-in manner, so that the extrusion force of soil resistance of the drain pipe is enhanced during construction; meanwhile, the built-in drain board and the filling of granular stone nitrates can prevent soil from invading the drain board to block the drain hole, so that the water discharge can be effectively increased, and the periodicity of the whole vacuum preloading precipitation is shortened.

Description

Novel vacuum preloading drain pipe and vacuum preloading construction method used by same

Technical Field

The invention relates to the technical field of geotechnical engineering, in particular to a novel vacuum preloading drainage pipe and a vacuum preloading construction method used by the same.

Background

Current vacuum preloading drain bar adopts plastics plane drain bar more, and anti extrusion ability is weak, receives external force extruded effect easily under, causes the geotechnological cloth in the drain bar outside to take place to break to make during soil invades the drain bar, lead to the drainage preformed hole to block up and can't realize precipitation, can't reach the ground and handle the requirement.

The novel soft soil roadbed processing construction method solves the defects that the geotextile is damaged and the reserved hole of the drainage plate is blocked because the traditional drainage plate is extruded by soil through the stable hard plastic hard three-dimensional cross plate and the filling of granular rock saltpeter.

Disclosure of Invention

Aiming at the problems, the novel vacuum preloading drain pipe with high water absorption rate and good construction effect and the vacuum preloading construction method used by the novel vacuum preloading drain pipe are provided.

The specific technical scheme is as follows:

the first aspect of the invention provides a novel vacuum preloading drain pipe, which is characterized by comprising the following components:

the cross section of the drainage plate is in a cross shape, and drainage holes are uniformly formed in the drainage plate and penetrate through the side wall of the drainage plate; and

surround in the drain bar periphery and be fixed in the geotechnological cloth that permeates water on the drain bar, and the restriction forms a plurality of filling areas between drain bar and the geotechnological cloth that permeates water, and the filling is filled with and is used for increasing structural strength and can carry out coarse filtration's filler in the filling area.

The novel vacuum preloading drain pipe also has the characteristic that the drain board is formed by injection molding of hard plastics.

The novel vacuum preloading drain pipe also has the characteristic that the filler is granular filler.

The novel vacuum preloading drain pipe also has the characteristic that the filler is granular rock nitride.

The second aspect of the invention provides a vacuum preloading construction method using the novel vacuum preloading drainage pipe, which is characterized by comprising the following steps:

step one, surrounding and fixing the permeable geotextile on a drainage plate to obtain a prefabricated drainage pipe;

step two, backfilling permeable sand on the surface of the area to be constructed to form a drainage sand cushion layer, leading holes in the area to be constructed according to a design drawing, then placing the prefabricated drainage pipe into the leading holes, and pouring fillers into the filling area;

embedding a drainage filter pipe in the drainage sand cushion layer, wherein the side wall of the drainage filter pipe is provided with a water diversion hole;

fourthly, laying a sealing film on the drainage sand cushion layer, enabling the sealing film to be attached to the inner wall of the isolation channel positioned around the area to be constructed, and pressing the sealing film in the isolation channel;

step five: and communicating the drainage filter pipe with a vacuum pump, and pumping negative pressure in a drainage pipe through the vacuum pump.

The vacuum preloading construction method is also characterized in that the depth of the lead hole in the step two is equal to the designed depth of the vacuum precipitation, and the depth of the lead hole is greater than or equal to the height of the drain pipe.

The beneficial effect of above-mentioned scheme is:

in the novel vacuum preloading drain pipe, the drain plate is arranged in the cylindrical permeable geotextile in a built-in manner, so that the extrusion force of soil resistance of the drain pipe is enhanced during construction; meanwhile, the built-in drain board and the filling of granular stone nitrates can prevent soil from invading the drain board to block the drain hole, so that the water discharge can be effectively increased, and the periodicity of the whole vacuum preloading precipitation is shortened.

Drawings

Fig. 1 is a schematic structural view of a drain board provided in an embodiment of the present invention;

fig. 2 is a schematic structural view of a drain pipe provided in an embodiment of the present invention.

In the drawings: 1. a drain plate; 2. a drain hole; 3. water-permeable geotextile; 4. and filling the area.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

Fig. 1 is a schematic structural view of a drain board provided in an embodiment of the present invention; fig. 2 is a schematic structural view of a drain pipe provided in an embodiment of the present invention. As shown in fig. 1 and 2, the novel vacuum preloading drain pipe provided in the embodiment of the present invention has the following features: the drainage plate 1 (can be formed by injection molding of hard plastics), the cross section of the drainage plate 1 is in a cross shape, drainage holes 2 are uniformly formed in the drainage plate 1, and the drainage holes 2 penetrate through the side wall of the drainage plate 1; and the geotextile 3 that permeates water that surrounds in drain bar 1 periphery and be fixed in on the drain bar 1, and retrain between drain bar 1 and the geotextile 3 that permeates water and form 4 filling areas 4, and the filling area 4 intussuseption is filled with granular filler.

The cross-shaped structure of the drainage plate 1 can effectively support the peripheral permeable geotextile 3 from the axial direction and the radial direction of the drainage pipe, and the existence of fillers in the filling area is matched, so that the soil-resistant extrusion force of the drainage pipe is greatly enhanced during construction, and the problems that the conventional vacuum pre-pressed drainage plate is easy to damage and even cannot reduce water due to extrusion of the soil layer are solved.

The granular filler can also perform coarse filtration on extruded water, so that the problem that the drainage hole is blocked by soil in the conventional design due to insufficient filtration or direct invasion of the drainage plate is avoided, the drainage capacity can be effectively increased, and the periodicity of the whole vacuum preloading precipitation is shortened.

The vacuum preloading construction method utilizing the novel vacuum preloading drainage pipe comprises the following steps:

firstly, surrounding and fixing the permeable geotextile 3 on the drainage plate 1 to obtain a prefabricated drainage pipe;

step two, backfilling permeable sand on the surface of the area to be constructed to form a drainage sand cushion layer, leading holes in the area to be constructed according to a design drawing (the depth of the leading holes is equal to the design depth of vacuum precipitation, and the depth of the leading holes is greater than or equal to the height of a drainage pipe), then placing the prefabricated drainage pipe into the leading holes, and filling filler into the filling area 4;

According to the drainage pipe, the drainage pipe is arranged in the guide hole, so that the phenomenon that the drainage pipe is broken, knotted or damaged to cause water leakage and even cannot reduce water is avoided.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a novel vacuum preloading drain pipe which characterized in that includes:

the cross section of the drainage plate (1) is in a cross shape, drainage holes (2) are uniformly formed in the drainage plate (1), and the drainage holes (2) penetrate through the side wall of the drainage plate (1); and

surround in drain bar (1) periphery is fixed in geotechnological cloth (3) of permeating water on the drain bar (1), just drain bar (1) reaches restraint between geotechnological cloth (3) of permeating water forms a plurality of filling areas (4), filling area (4) are filled with and are used for increasing structural strength and can carry out coarse filtration's filler.

2. The new vacuum pre-pressed drain pipe according to claim 1, characterized in that the drain board (1) is injection molded from hard plastic.

3. The novel vacuum pre-pressed drain pipe according to claim 1, wherein the filler is granular filler.

4. The novel vacuum preloading drain pipe of claim 3, wherein the filler is granular saltpeter.

5. A vacuum preloading construction method using the novel vacuum preloading drainage pipe as claimed in any one of claims 1 to 4, characterized by comprising the steps of:

firstly, surrounding and fixing a permeable geotextile (3) on a drainage plate (1) to obtain a prefabricated drainage pipe;

step two, backfilling permeable sand on the surface of the area to be constructed to form a drainage sand cushion layer, leading holes in the area to be constructed according to a design drawing, then placing the prefabricated drainage pipe into the leading holes, and pouring fillers into the filling area (4);

fourthly, laying a sealing film on the drainage sand cushion layer, enabling the sealing film to be attached to the inner wall of an isolation channel positioned around the to-be-constructed area, and pressing the sealing film in the isolation channel;

step five: and communicating the drainage filter pipe with a vacuum pump, and pumping negative pressure in the drainage pipe through the vacuum pump.

6. The vacuum preloading construction method according to claim 5, wherein the depth of the lead hole in the second step is equal to the designed depth of the vacuum precipitation, and the depth of the lead hole is greater than or equal to the height of the drain pipe.