CN211172034U

CN211172034U - Water-rich basement falls drainage structures

Info

Publication number: CN211172034U
Application number: CN201921826771.0U
Authority: CN
Inventors: 胡刚; 王国炜; 尹江; 张志河; 余飞; 麻瑀; 郭廷; 郭铭跃; 李兴海; 焦鑫鹏
Original assignee: China Railway Erju 1st Engineering Co Ltd
Current assignee: China Railway Erju 1st Engineering Co Ltd
Priority date: 2019-10-29
Filing date: 2019-10-29
Publication date: 2020-08-04
Anticipated expiration: 2029-10-29

Abstract

The utility model provides a drainage structures falls in rich water base, including the blind pipe that permeates water, the blind pipe that permeates water is that surface distribution sets up the semicircle pipe in the hole of permeating water, and the blind pipe overcoat that permeates water is equipped with the nylon wire, and the blind pipe that permeates water is detained along the length direction who falls the escape canal and is located the ditch end that falls the escape canal, and the one end that falls the escape canal extends to sump pit department, and the regional packing in the outside that falls the blind pipe that permeates water in the escape canal has the granule rubble. The problems that filter pipes of dewatering wells are damaged and blocked in a large amount in the existing excavation process, and when the foundation part is excavated, the foundation dewatering and drainage requirements cannot be met are solved. Belongs to the technical field of drainage construction of deep foundation pit bases.

Description

Water-rich basement falls drainage structures

Technical Field

The utility model relates to a drainage structures falls in rich water basement belongs to deep basal pit basement and falls drainage construction technical field.

Background

In the Zhujiang Delta area, because the groundwater content is abundant, before the excavation of a deep foundation pit, dewatering and drainage are required in advance, and because the geological conditions are complex, the upper geology is silt, silty sand bed and muddy sand bed. In the process of excavation of the foundation pit, due to the fact that the dewatering well and the earth excavation process of the foundation pit are careless, the dewatering well is prone to being damaged by filtering pipes and blocked, and cannot meet the drainage requirement when the foundation pit is excavated to the base, and drainage measures need to be additionally arranged. Taking the civil engineering of the general Buddha ring line GFHD-1 standard scientific central station of the triangle-shaped city as an example, the excavation depth of a foundation pit is 36.5m, and the underground water level is about 2.3 m. The surrounding environment of the foundation pit is complex, the distance of 100m to the side of the foundation pit is the Zhujiang, the underground water level is high, and the underground water is rich; the station geological conditions are as follows from top to bottom: miscellaneous fill, a seaside sediment sand layer, a seaside sediment facies soil layer and argillaceous sandstone; the basement part is mainly formed by strongly weathered argillaceous sandstone. Most of dewatering well filter pipes are damaged and blocked in the excavation process, when the foundation part is excavated, the foundation dewatering and drainage requirements cannot be met, the foundation water level is guaranteed to be below the excavation surface, meanwhile, the upper structure construction is met as a main control point, and the requirements cannot be met by the conventional construction method.

Disclosure of Invention

The utility model provides a drainage structures falls in rich water basement to solve present excavation in-process, precipitation well chimney filter can be destroyed in a large number and block up, when excavation to basement position, can't satisfy the problem of basement precipitation, drainage requirement already.

In order to realize the above purpose, the utility model discloses plan to adopt such drainage structures falls in rich water base, including the blind pipe that permeates water, the blind pipe that permeates water is that surface distribution sets up the semicircle pipe in the hole of permeating water, and the blind pipe overcoat that permeates water is equipped with the nylon wire, and the blind pipe that permeates water is detained along the length direction who falls the escape canal and is located the ditch end that falls the escape canal, and the one end that falls the escape canal extends to sump pit department, and the regional packing in the outside that falls the blind pipe that permeates water in the escape canal has the granule rubble.

In the water-rich substrate drainage structure, the granular broken stones are filled to be level to the surface of the foundation pit, waterproof linoleum is laid above the granular broken stones, and two sides of the waterproof linoleum are laid in a region of 20-30cm of the extension of two sides of the upper end of the drainage ditch;

in the water-rich substrate dewatering and drainage structure, the water-permeable blind pipes are formed by cutting the dewatering well filter pipes from the middle along the length direction, the water-permeable blind pipes are cut into two symmetrical semicircular structures, namely two water-permeable blind pipes, and if the water-permeable blind pipes are not long enough, two or more water-permeable blind pipes are butted to form the required water-permeable blind pipes.

Compared with the prior art, the water permeable blind pipe in the water-rich foundation dewatering and drainage structure can be processed by adopting the abandoned dewatering well filter pipe in the construction site, the processing and the manufacturing are simple, and the cost is saved; the semi-circular water-permeable blind pipe is processed and manufactured, so that water on the substrate can be gathered into the pipe, and the water-permeable effect is improved; plays an important role in the drainage process of the deep foundation pit substrate; the water-rich basement drainage structure is verified in actual use in civil engineering of the bead triangle inter-city Guangfu loop GFHD-1 standard scientific central station, and is safe in construction, reliable in quality, convenient and fast in construction, low in cost and good in benefit. Through the successful application of the engineering, the method has important guiding significance for the drainage construction of similar water-rich substrates.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

fig. 2 is the utility model discloses well blind pipe that permeates water settles the schematic structure drawing in falling the escape canal.

Detailed Description

To further clarify the objects, technical solutions and advantages of the present invention, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings.

Examples

Referring to the attached

drawings

1 and 2, the embodiment provides a water-rich basement drainage structure, which comprises a water-permeable blind pipe 1, wherein the surface of the water-permeable blind pipe 1 is provided with semi-circular pipes with water-permeable holes, the water-permeable blind pipe 1 is formed by cutting a dewatering well filter pipe from the middle along the length direction, the water-permeable blind pipe 1 is processed by utilizing the discarded dewatering well filter pipe at the construction site and is cut into two symmetrical semi-circular structures, if the length is not enough, two or more than two water-permeable blind pipes are butted to form the required water-permeable blind pipe 1, a nylon net 3 is sleeved outside the water-permeable blind pipe 1, the water-permeable blind pipe 1 is buckled at the bottom of the dewatering ditch 2 along the length direction of the dewatering ditch 2, one end of the dewatering ditch 2 extends to a water collection pit, the outer side area of the water-permeable blind pipe 1 in the dewatering ditch 2 is filled with crushed stone 4, the crushed stone 4 is filled to be level with the, and two sides of the waterproof asphalt felt 5 are paved to the areas of 25cm of the extension of the two sides of the upper end of the drainage ditch 2;

the construction process flow is as follows:

construction preparation (excavation of a foundation pit to a designed elevation, processing of a permeable blind pipe 1) → excavation of a descending drainage ditch 2 → paving of a nylon net 3, placing of the permeable blind pipe 1 and wrapping of the permeable blind pipe 1 → backfilling of granular broken stones 4 and covering of a layer of waterproof felt 5 → pouring of a concrete cushion.

The specific operating points are as follows:

1. preparation for construction

1.1 processing of Water permeable Blind pipes

The blind pipe 1 that permeates water is formed by the useless precipitation well filter tube processing of job site, and the blind pipe 1 that permeates water is 377mm for the external diameter, and the precipitation well filter tube that wall thickness t equals 4mm cuts into two semicircles.

1.2 Deviational drainage ditch excavation

After the foundation ditch excavation reached design elevation, hang large-scale excavator from the foundation ditch, change into small-size excavator and fall escape canal 2 excavation, fall escape canal 2 excavation depth H and become 30cm, excavation width B becomes 50 cm. After the trench is dug to the bottom of the trench, whether the trench bottom is flat or not is checked, and the slag soil and sundries at the bottom of the trench are cleaned.

1.3 laying nylon net, placing permeable blind pipe and wrapping permeable blind pipe

Nylon net 5 is laid at the bottom of the ditch, nylon net 5's width is 1m, mainly consider nylon net 5 will permeate water the width of blind pipe 1 parcel round, after laying nylon net 5, will process the blind pipe 1 back-off that permeates water that makes at the bottom of the ditch, then wrap up blind pipe 1 that will permeate water with nylon net 5, make 1 surface of blind pipe that permeates water cover at least one deck nylon net 5, tie up nylon net 5 and blind pipe 1 that permeates water through 12# lead wire again, carry out the inspection after the ligature is accomplished, ensure that the ligature is firm.

1.4 backfilling particle macadam and covering a layer of waterproof asphalt felt

After the permeable blind pipe 1 is installed, backfilling granular broken stones 4, wherein the broken stones are granular broken stones with the diameters of 3-5cm and irregular shapes, covering a layer of waterproof felt 5 on the top after the broken stones are backfilled, and mainly aiming at preventing cement paste from entering a drainage ditch 2 to cause blockage when cushion concrete pouring is carried out, wherein the width of the felt is 1m, the drainage is carried out, and the left side and the right side of the drainage ditch are overlapped by 25 cm.

1.5 cast concrete cushion

After the waterproof asphalt felt 5 is paved, whether the drainage ditch 2 can normally drain water is checked, after all the drainage ditches meet the requirements, the top concrete cushion is poured, and in the process of pouring the cushion, cement paste is prevented from falling into the drainage ditch as much as possible.

2 basic principle

The basic principle of the cement soil pouring device is as follows: the method comprises the following steps of excavating a drainage ditch 2, burying a permeable blind pipe 1 underground, collecting water at the bottom of a foundation pit to the bottom of the drainage ditch 2 through permeable broken stone particles and the permeable blind pipe 1, collecting the water into a water collection pit through the drainage ditch 2, and discharging the water in the foundation pit to the outside of the foundation pit through a water pump.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a water-rich basement falls drainage structures which characterized in that: including the blind pipe (1) that permeates water, the blind pipe (1) that permeates water is the semicircle pipe that surface distribution seted up the hole of permeating water, and the blind pipe (1) overcoat that permeates water is equipped with nylon wire (3), and the blind pipe (1) that permeates water is detained along the length direction who falls escape canal (2) and is located the ditch bottom of falling escape canal (2), and the one end that falls escape canal (2) extends to sump pit department, and the regional packing in the outside of the blind pipe (1) that permeates water in the escape canal (2) has granule rubble (4).

2. The water-rich substrate dewatering and drainage structure of claim 1, wherein: the particle gravel (4) is filled to be level with the foundation pit surface, a waterproof felt (5) is laid above the particle gravel (4), and the two sides of the waterproof felt (5) are laid to extend to the two sides of the upper end of the drainage ditch (2) for 20-30 cm.

3. The water-rich substrate dewatering and drainage structure of claim 1, wherein: the permeable blind pipe (1) is formed by cutting the middle of a dewatering well filter pipe along the length direction.