CN211113593U - A collection and drainage blind pipe applied to slope anti-seepage - Google Patents

Abstract

A blind pipe for collecting and draining applied to slope anti-seepage is provided in order from the center of the blind pipe to a compressive support structure, a random wire pipe wall, a PVC semicircular pipe and a spinning geofiltration membrane; the compressive support structure is: It is an integrated structure composed of a piston shaft, a rubber piston, an empty cylinder, a supporting inclined plate and a circular arc sheet. The upper and bottom of the piston are respectively fixed to the piston shaft and the empty cylinder, and the top of the piston shaft and the bottom of the empty cylinder are respectively connected with two pieces of support Inclined plate, the end of each supporting inclined plate is fixedly connected to a circular arc sheet that is tangent to the inner wall of the random wire pipe wall, the circular arc sheet is made with water permeable holes; the PVC semi-circular pipe is attached to the random wire outside The outer wall of the tube wall of the spun silk type; The utility model has strong compressive strength and is not easily deformed under the action of external force, especially under the action of vertical load, thereby improving the drainage effect, and the water collected in the blind pipe will not continue to seep down, thereby achieving a good water collection effect.

Description

A collection and drainage blind pipe applied to slope anti-seepage

technical field

The utility model belongs to the technical field of underground water collection and drainage in landslide control engineering, in particular to a collection and drainage blind pipe applied to slope anti-seepage.

Background technique

my country is a country with serious landslide disasters. Landslide disasters directly affect people's lives and property safety. Especially in coastal areas, there are generally deep and weak soil layers. These soil layers have large porosity, high natural moisture content and low strength. Even if the slope rate is relatively slow, the overall instability of the potential sliding surface inside the slope will be caused by the infiltration of surface water during the rainfall process, which will lead to serious landslide accidents. especially important.

At present, the drainage blind pipes used for slope anti-seepage are made of synthetic fibers, plastics and synthetic rubbers as raw materials, and are made of geotechnical products by different processes. Its main structure is composed of a random wire pipe wall and an outsourcing finished geotextile. Its main defects are: ① The compressive strength is very low, and it is easy to deform under the action of external force, especially under the action of vertical load, resulting in reduced drainage effect; ② After the surface water seeps into the dead pipe, it is easy to continue to seep, and it cannot play a good water collection effect, especially when the rainfall infiltrates, the collection and drainage effect is even worse. ③Because the traditional outsourcing geotextile is not tightly combined with the pipe wall, the pipe wall is easily affected by indentation, which reduces the drainage effect.

The Chinese patent "Composite Collecting and Draining Blind Pipe" (Patent No.: ZL200410013820.0) discloses a composite method that utilizes the tension of the spring to closely contact the spring lining with the random wire pipe wall, thereby enhancing the compressive strength of the blind pipe. Collection and drainage blind pipes. However, the deformation of the spring cannot be recovered under the action of large vertical load, which can easily affect the effect of collecting and draining, and the water collected in the dead pipe can easily continue to seep down, which cannot achieve a good water-collecting effect.

Utility model content

The purpose of the utility model is to provide a blind pipe for collecting and draining which is applied to the anti-seepage of the slope. The blind pipe for drainage has strong compressive strength and is not easily deformed under the action of external force, especially under the action of vertical load, thereby improving the drainage effect. And the water collected in the dead pipe will not continue to infiltrate, so as to achieve a good water collection effect.

In order to achieve the above purpose, the utility model provides the following technical solutions: a blind pipe for collecting and draining applied to slope anti-seepage, characterized in that: from the center of the blind pipe, a compressive support structure, a random wire pipe wall, PVC semi-circular tube and spinning geofilter membrane; the compression-resistant support structure is an integrated structure composed of a piston shaft, a rubber piston, an empty cylinder, a supporting inclined plate and a circular arc sheet, wherein the upper part and the bottom of the piston are respectively fixed to the piston shaft and the empty cylinder, the top of the piston shaft and the bottom of the empty cylinder are respectively connected with two supporting inclined plates, and the ends of each supporting inclined plate are fixedly connected to the circular arc sheet tangent to the inner wall of the random wire pipe wall. The sheet is provided with permeable holes; the PVC semi-circular pipe is attached to the outer wall of the random-filament pipe wall; the spinneret geofilter membrane includes a geotextile layer and a synthetic fiber layer, and the geotextile layer is wrapped on the outside of the random-filament pipe wall On the surface, the synthetic fiber silk layer is compounded on the geotextile layer.

The scrambled-filament tube wall is made of plastic filaments extruded by an extruder and disrupted when it is formed, the porosity is 70-90%, and the diameter of the plastic filaments is 1 mm-3 mm.

The supporting inclined plate is an integral structure with the piston shaft, the hollow cylinder and the circular arc sheet, and the connecting surfaces of the three and the supporting inclined plate are all cut with small rectangular inclined sections of the same size as the supporting inclined plate.

The supporting inclined plates all form an included angle of 45° with the horizontal direction.

The thickness of the circular arc sheet is 2mm, and a plurality of water-permeable holes with a diameter of 3mm are uniformly arranged thereon.

The area of the contact surface of each circular arc sheet and the inner wall of the random wire tube is 12 cm ² .

Compared with the prior art, the beneficial effects of the present utility model are:

1. The compressive strength of the present utility model is greatly improved due to the addition of a compressive support structure, and at the same time, the drainage space is ensured, which greatly improves the effect and reliability of the collection and drainage.

2. The PVC semicircular pipe is added by the utility model, which can prevent the surface water from infiltrating into the dead pipe and can not be discharged well through the dead pipe due to continuous infiltration, especially the rainfall infiltrating slope, passing through the PVC semicircular pipe. It can effectively collect the surface water infiltrated vertically from the slope and divert it to drain, so as to achieve a good collection and drainage effect and prevent the occurrence of landslides.

3. Because the surface spinneret geomembrane is tightly combined with the random-filament pipe wall and has no joints, the utility model solves the problem that the traditional outsourcing geotextile is not tightly combined with the pipe wall, which will affect the collection and drainage due to the indentation of the pipe wall. In addition, the short fiber needle-punched geotextile used has the characteristics of anti-aging, acid and alkali resistance, wear resistance, good toughness and easy construction, which effectively improves the service life of the blind pipe.

Description of drawings

1 is a schematic diagram of an axial section of the present utility model;

Fig. 2 is the cross-sectional schematic diagram of the present utility model;

Figure 3 is a front view of the compressive support structure of the present utility model;

Fig. 4 is the schematic diagram of the circular arc sheet of the present utility model;

Figure 5 is a top view of the compressive support structure of the present invention;

Figure 6 is a sectional view of a dead pipe arrangement;

Figure 7 is a top view of the dead pipe arrangement.

In the figure: 1 is the compressive support structure; 2 is the random wire pipe wall; 3 is the PVC semi-circular pipe; 4 is the spinneret geomembrane; 5 is the piston shaft; 6 is the piston; 7 is the cylinder; ; 9 is a circular arc sheet; 10 is a permeable hole; 11 is a small rectangular section; 12 is a slope.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to Figures 1-4, in an embodiment of the present utility model, a blind pipe structure for collecting and draining is applied to slope anti-seepage. Wall 2, PVC semicircular pipe 3 and spinneret geomembrane 4.

1. The wall 2 of the random wire type is a plastic wire extruded by an extruder and is disturbed when it is formed. The porosity is 70-90%, and the diameter of the plastic wire is 1mm-3mm.

2. The anti-compression support structure 1 is a closed syringe type integrated structure composed of a piston shaft 5 , a rubber piston 6 , an empty cylinder 7 , a supporting inclined plate 8 , and a circular arc sheet 9 . The top of the piston shaft 5 and the bottom of the hollow cylinder 7 are respectively connected with two supporting inclined plates 8, and the ends of the supporting inclined plates 8 are fixedly connected to the circular arc sheet 9 that is closely tangent to the inner wall of the random wire pipe wall 2. The circular arc sheet A plurality of water permeable holes 10 with a diameter of 3 mm are evenly arranged on the 9, which can effectively prevent the water seepage effect of the random wire pipe wall 2 from being affected by the contact surface. Use strong waterproof glue (KEYDAK glue) to stick the circular arc sheet 9 and the inner wall of the tangent random wire wall 2 tightly together.

The supporting inclined plate 8 is integrated with the piston shaft 5, the hollow cylinder 7 and the arc sheet 9, and the connecting surfaces of the three and the supporting inclined plate 8 are cut with a small rectangular inclined plate of the same size as the cross-section of the supporting inclined plate 8. The section 11 is used for better fixed connection, better support effect, and improved lodging resistance of the dead pipe. Moreover, the supporting inclined plates 8 are all at an included angle of 45° with the horizontal direction, so as to maximize the inner space of the support pipe and achieve a better effect of collecting and draining water.

The thickness of the circular arc sheet 9 is about 2 mm, and the area of the contact surface of the circular arc sheet 9 with the random wire tube wall 2 is 12 cm ² .

Except for the rubber piston 6, all components of the compression-resistant support structure 1 are made of high-strength, tough, and corrosion-resistant PC plastic.

3. The PVC semi-circular pipe 3 is closely attached to the outer wall of the random wire type pipe wall 2, and the two are tightly adhered together with waterproof super glue (KEYDAK glue).

Fourth, the spinning geofilter membrane 4 is made by tightly wrapping the geotextile layer on the outer surface of the random-filament pipe wall 2, and then spraying the synthetic fiber silk layer.

The working principle of the utility model is as follows: the moisture in the soil around the blind pipe arranged in the shallow soil layer of the side slope is quickly collected by the blind pipe through capillary action, gravity action and seepage action, and is led out of the slope through the middle channel of the blind pipe, especially rainfall. At this time, the water infiltrated from the slope surface can be quickly collected by the blind pipe and discharged out of the slope, completing the collection and drainage process.

The compressive support structure 1 mainly plays the role of supporting the scrambled pipe wall 2, the PVC semi-circular pipe 3 and the spinneret geomembrane 4. The piston 6 in the compressive support structure 1 can follow the piston shaft 5 under the action of pressure. Since the air in the hollow cylinder 7 at the lower part of the piston 6 is airtight, the compressibility of the gas can be used to achieve its elastic support, which effectively improves the compressive strength of the dead pipe. The supporting inclined plate 8 is integrated with the piston shaft 5, the hollow cylinder 7 and the circular arc sheet 9, and the connecting surfaces of the three and the supporting inclined plate 8 are all cut with a small rectangular inclined section 11 of the same size as the supporting inclined plate 8 section. In order to better fix the connection, play a better supporting effect and improve the lodging resistance of the dead pipe. The supporting inclined plates 8 are all at an angle of 45° with the horizontal direction, so as to support the inner space of the pipe as much as possible and achieve a better effect of collecting and draining. The purpose of opening the water permeable holes 10 on the circular arc sheet 9 is to effectively prevent the water seepage effect of the random wire pipe wall 2 from being affected due to the impermeability of the contact surface.

The random wire tube wall 2 mainly plays the role of supporting the spinneret geofiltration membrane 4, and at the same time, the random wire tube wall 2 has a large gap to allow the surface infiltration water and groundwater to enter freely.

The PVC semicircular pipe 3 mainly functions to collect the infiltration water on the surface and the water in the soil around the blind pipe, and prevent the water collected in the pipe from infiltrating again, so that the collected water can be led out of the slope with the PVC semicircular pipe.

The spinneret geomembrane 4 mainly plays the role of filtering water, and prevents soil particles and other impurities from entering the blind pipe.

The construction process of the present utility model is as follows: place a compressive support structure 1 in the blind pipe every 30-45 cm, and select the spacing according to the actual soil conditions. If it is larger, then the compressive support structure 1 is placed in the tube every 30cm or so, otherwise, it is placed every 45cm or so. The blind pipe 11 is arranged along the full length of the slope 12, and the blind pipe 11 is located at a distance of 30-50 cm from the slope 12. If the construction requires, the slope 12 can be appropriately cut and treated in advance. The distance between the blind pipe 11 and the blind pipe 11 is about 60 cm, which can be adjusted appropriately according to the actual actual environment. In addition, the blind pipe is easy to construct, and the quality of the blind pipe can be regularly inspected and replaced when necessary.

The preferred embodiments of the present patent have been described in detail above, but the present invention is not limited to the embodiments, and within the knowledge scope possessed by those of ordinary skill in the art, it is also possible to do under the premise of not departing from the purpose of the present invention. various changes.

Claims (6)

1. a collection and drainage blind pipe applied to slope anti-seepage is characterized in that: from the center of the blind pipe, a compression supporting structure, a random wire type pipe wall, a PVC semi-circular pipe and a spinning geomembrane are arranged in turn; The anti-compression support structure is an integrated structure composed of a piston shaft, a rubber piston, an empty cylinder, a supporting inclined plate and a circular arc sheet. Two supporting inclined plates are respectively connected, and the end of each supporting inclined plate is fixedly connected to a circular arc sheet tangent to the inner wall of the random wire pipe wall, and the circular arc sheet is made with water permeable holes; the PVC semicircle The outside of the pipe is attached to the outer wall of the random-filament pipe wall; the spinning geofilter membrane includes a geotextile layer and a synthetic fiber layer, the geotextile layer is wrapped on the outer surface of the random-filament pipe wall, and the synthetic fiber silk layer is compounded on the geotextile layer. superior. 2. The blind pipe of collecting and draining water applied to slope anti-seepage according to claim 1, characterized in that: the wall of the random-wire type pipe is a plastic wire extruded by an extruder and is made of plastic wire when it is formed. Disrupted, its porosity is 70-90%, and the diameter of the plastic wire is 1mm-3mm. 3. The blind pipe of collecting and draining applied to slope anti-seepage according to claim 1, characterized in that: the supporting inclined plate is an integral structure with the piston shaft, the hollow cylinder and the circular arc sheet, and the three and the The connecting surface of the supporting inclined plate is cut with a small rectangular inclined section of the same size as the section of the supporting inclined plate. 4 . The blind pipe of collecting and draining applied to slope anti-seepage according to claim 1 , wherein the supporting inclined plates all form an included angle of 45° with the horizontal direction. 5 . 5 . The blind pipe of collecting and draining applied to slope anti-seepage according to claim 1 , wherein the thickness of the circular arc sheet is 2 mm, and a plurality of permeable holes with a diameter of 3 mm are evenly arranged thereon. 6 . 6 . The blind pipe of collecting and draining applied to slope anti-seepage according to claim 1 , characterized in that: the area of the contact surface between each circular arc sheet and the inner wall of the random-wire pipe is 12 cm ² . 7 .

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