CN206512733U - A kind of two-layer equation drainage arrangement - Google Patents

Abstract

The utility model discloses a double-layer drainage device, which comprises an internal drainage pipe, an external drainage pipe is covered with the internal drainage pipe, and the internal drainage pipe and the external drainage pipe are connected through a connecting plate. Water guiding holes are arranged on the board, and several through holes are arranged on the side of the external drain pipe. A double-layer drainage device is provided with an external drainage pipe, which is used to drain the water in the rammed earth foundation. In addition, the annular drainage channel formed between the internal drainage pipe and the external drainage pipe can also be filled with water-permeable and water-absorbable Fiber material or dry coarse sand is used to accelerate the discharge of moisture inside the rammed earth foundation; the internal drainage pipe is used to quickly discharge ground water and surface runoff caused by rainfall; the utility model can quickly discharge the moisture inside the foundation and the ground formed by rainfall Runoff or runoff.

Description

A double-deck drainage device

technical field

The utility model belongs to the technical field of drainage and relates to a double-layer drainage device.

Background technique

At present, a large number of reports about ancient ruins and ancient building diseases are not uncommon. A large number of on-site investigations, non-destructive detection, model tests, numerical analysis and other research results show that most of the rammed earth sites with a long history and the foundations of ancient brick-earth structures are facing the problems of alkali, biological invasion, weathering, erosion, water damage, Water damage and structural diseases such as voids, cracks, and even collapses. The main mechanism of this disease is: long-term rainfall infiltrates into rammed earth sites or rammed earth foundations of ancient buildings, and the permeability of rammed earth is extremely low. The moisture inside the soil is difficult to discharge in a short period of time, and the internal saturation gradually increases over time, which in turn induces subsidence and softening of the foundation, resulting in uneven deformation. The continuous rainfall infiltration takes away the fine sticky particles and soluble salt inside the soil, and finally Seepage channels are generated, which induces a reduction in the bearing capacity of the rammed earth foundation. For ancient rammed earth sites, the soil layer is gradually eroded, cracked, collapsed, and completely lost. For the ancient building base of "outer brick-core wall soil", it will induce peeling, alkali cracking, cracking and even collapse of the brick wall. and other structural damage. In short, the direct cause of ancient ruins and ancient building diseases is that the infiltration of rainwater or other water sources induces the rise and accumulation of moisture inside the foundation, which is difficult to discharge.

Utility model content

The purpose of the utility model is to provide a double-layer drainage device, which can quickly discharge the surface runoff or runoff formed by the moisture inside the foundation and rainfall.

The technical scheme adopted by the utility model is that a double-layer drainage device includes an internal drainage pipe, and an external drainage pipe is covered with the internal drainage pipe. The internal drainage pipe and the external drainage pipe are connected by a connecting plate, and the connecting plate is located In the radial direction, the connecting plate is provided with water guide holes, and the side of the external drain pipe is provided with several through holes.

The utility model is also characterized in that,

The outer wall of the external drain pipe is wrapped with a permeable geotextile.

An annular drain channel is formed between the inner drain pipe and the outer drain pipe, and fillers are arranged in the annular drain channel.

The filling is absorbent fiber material or dry coarse sand.

The through holes are evenly arranged in several layers around the radial direction of the external drain pipe.

Several layers of connecting plates are evenly arranged, and at least four connecting plates are arranged on each layer, and each layer of connecting plates is evenly arranged around the radial direction of the external drain pipe.

The through hole is an oblique through hole, and the angle between the through hole and the external drain pipe is 15°.

The beneficial effects of the utility model are: a double-layer drainage device is provided with an external drainage pipe, and the external drainage pipe is used to discharge the water in the rammed earth foundation. In addition, the annular drainage channel formed between the internal drainage pipe and the external drainage pipe can also Filled with permeable and water-absorbable fiber materials or dry coarse sand, artificially constructed media with strong "matrix suction" are used to accelerate the drainage of moisture inside the rammed earth foundation; internal drains are used to quickly drain the ground caused by rainfall Standing water and surface runoff; in order to prevent relative displacement and twisting of the internal drain pipe and the external drain pipe, the internal drain pipe and the external drain pipe are connected through a connecting plate. It can quickly discharge surface runoff or runoff formed by moisture and rainfall inside the foundation.

Description of drawings

Fig. 1 is a schematic structural view of Embodiment 1 of a double-layer drainage device of the present invention;

Fig. 2 is a schematic structural view of Embodiment 2 of a double-layer drainage device of the present invention;

Fig. 3 is a left view of Embodiment 2 of a double-layer drainage device of the present invention;

Fig. 4 is a top view of Embodiment 2 of a double-layer drainage device of the present invention.

In the figure, 1. Permeable geotextile, 2. External drainage pipe, 3. Through hole, 4. Filler, 5. Connection plate, 6. Internal drainage pipe, 7. Water guide hole.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model provides a double-deck drainage device, as shown in Fig. 2-Fig. The connecting plate 5 is connected to the radial direction of the external drain pipe 2, the connecting plate 5 is provided with a water guide hole 7, and the side of the external drain pipe 2 is provided with several through holes 3;

The through hole 3 is a slanted through hole, and the angle between the through hole 3 and the external drainage pipe 2 is 15°, which is convenient for the internal water discharge of the rammed earth foundation to avoid recharge;

The outer wall of the external drainage pipe 2 is wrapped with a permeable geotextile 1;

The through hole 3 is evenly arranged in several layers around the radial direction of the external drain pipe 2;

Several layers of connecting plates 5 are evenly arranged, and at least four connecting plates 5 are arranged on each layer, and each layer of connecting plates 5 is evenly arranged around the radial direction of the external drain pipe 2;

An annular drainage channel is formed between the inner drain pipe 6 and the outer drain pipe 2,

As shown in Figure 1, a filler 4 is arranged in the annular drainage channel; the filler 4 is a water-absorbing fiber material or dry coarse sand;

The external drainage pipe 2 is used to drain the water in the rammed earth foundation. In addition, the annular drainage channel formed between the internal drainage pipe 6 and the external drainage pipe 2 can also be filled with permeable and water-absorbable fiber materials or dry coarse sand. Construct a medium with strong "matrix suction" to accelerate the drainage of moisture inside the rammed earth foundation;

The internal drainage pipe 6 is used to quickly discharge ground water and surface runoff caused by rainfall;

In order to prevent the relative displacement and twisting of the internal drain pipe 6 and the external drain pipe 2, the internal drain pipe 6 and the external drain pipe 2 are connected through the connecting plate 5, and the connecting plate 5 is welded to the internal drain pipe 6 and the external drain pipe 2;

The outer wall of the external drainage pipe 2 is wrapped with a permeable geotextile 1, which is used to prevent the rammed earth clay particles from blocking the through hole 3;

The connecting plate 5, the internal drainage pipe 6 and the external drainage pipe 2 are all cast iron or other round steel pipes that are difficult to corrode.

The usage method of a kind of double-deck drainage device of the present utility model is:

1. Drilling: Drill vertically at the edge of the rammed earth foundation or the rammed earth foundation of ancient buildings to a predetermined height. The diameter of the drilled hole should be slightly larger than the outer diameter of the external drainage pipe 2 of the present invention, which is used to wrap the water seepage geotextile and down the pipeline;

2. Placement: For the rammed earth foundation, connect the molded utility model to a predetermined length, and connect the inner drain pipe 6 and the outer drain pipe 2 at the bottom of the inner drain pipe 6 and the outer drain pipe 2. Blocking, at the same time, arrange the suction pipe in the annular drainage channel between the internal drainage pipe 6 and the external drainage pipe 2, and fix it, and adopt hoisting equipment to vertically place it to the bottom of the foundation; for the rammed earth foundation of ancient buildings, no internal For the sealing of the bottom of the drainage pipe 6 and the external drainage pipe 2, an elbow should be arranged at the bottom of the pipe to connect the horizontal drainage pipe to divert the water to the non-affected area outside the base;

3. Drainage: For the rammed earth foundation, start the pump according to the water level, and quickly draw out the water in the annular drainage channel formed between the internal drainage pipe 6 and the external drainage pipe 2, so as to avoid the recharge of accumulated water inside the annular drainage pipe , for the rammed earth foundation of ancient buildings, the bottoms of the internal drainage pipe 6 and the external drainage pipe 2 are set to have a slope with free drainage, so as to ensure that water can flow freely to the non-affected area outside the foundation.

A double-layer drainage device of the present utility model is provided with an external drainage pipe 2, and the external drainage pipe 2 is used to discharge the moisture in the rammed earth foundation. In addition, the annular drainage channel formed between the internal drainage pipe 6 and the external drainage pipe 2 is also It can be stuffed with permeable and water-absorbable fiber materials or dry coarse sand, artificially constructed medium with strong "matrix suction" to speed up the drainage of moisture inside the rammed earth foundation; the internal drainage pipe 6 is used for rapid drainage due to rainfall Caused ground water and surface runoff; in order to prevent relative displacement and twisting of the internal drain pipe 6 and the external drain pipe 2, the internal drain pipe 6 and the external drain pipe 2 are connected through the connecting plate 5. It can quickly discharge surface runoff or runoff formed by moisture and rainfall inside the foundation.

Claims (7)

1. externally drained pipe (2) is cased with outside a kind of two-layer equation drainage arrangement, including internal drainage pipe (6), internal drainage pipe (6), Internal drainage pipe (6) and outer row water pipe (2) are connected by connecting plate (5), the footpath of connecting plate (5) externally-located drainpipe (2) To being provided with water-guiding hole (7) on connecting plate (5), the side of outer row water pipe (2) is provided with several through holes (3).

2. a kind of two-layer equation drainage arrangement according to claim 1, it is characterised in that：Outside the outer row water pipe (2) Wall is enclosed with permeable geotextiles (1).

3. a kind of two-layer equation drainage arrangement according to claim 1, it is characterised in that：The internal drainage pipe (6) and outer Formed between portion's drainpipe (2) and filler (4) is provided with annular drainage channel, annular drainage channel.

4. a kind of two-layer equation drainage arrangement according to claim 3, it is characterised in that：The filler (4) is fine for water suction Tie up material or dry coarse sand.

5. a kind of two-layer equation drainage arrangement according to claim any one of 1-4, it is characterised in that：The through hole (3) around Outer row water pipe (2) if radially uniform setting dried layer.

6. a kind of two-layer equation drainage arrangement according to claim 5, it is characterised in that：The connecting plate (5) is uniformly arranged If dried layer, every layer of connecting plate (5) is at least provided with four, radially uniform setting of the every layer of connecting plate (5) around outer row water pipe (2).

7. a kind of two-layer equation drainage arrangement according to claim 6, it is characterised in that：The through hole (3) is oblique through hole, is led to The angle of hole (3) and outer row water pipe (2) is 15 °.