CN210395389U - Underground construction blind well drainage system - Google Patents
Underground construction blind well drainage system Download PDFInfo
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- CN210395389U CN210395389U CN201920849702.5U CN201920849702U CN210395389U CN 210395389 U CN210395389 U CN 210395389U CN 201920849702 U CN201920849702 U CN 201920849702U CN 210395389 U CN210395389 U CN 210395389U
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Abstract
The utility model belongs to the building construction field, concretely relates to underground construction blind well drainage system. The utility model comprises a water collecting pit dug in the deep foundation pit, a water pumping system arranged in the water collecting pit and a drainage ditch dug at the top of the deep foundation pit; the water pumping system is a submersible pump with a protective shell, and water in the sump is discharged through the submersible pump; the utility model discloses a raft foundation, including sump pit, immersible pump protective housing, foundation bed course, waterproof layer and concrete protective layer, the foundation bed course, waterproof layer and concrete protective layer are poured in proper order on the earth wall, and the raft foundation is poured before and the corresponding backfill of each functional layer is carried out to the sump pit. The drainage system has good stability and strong anti-interference performance; the drainage pipe does not penetrate through the waterproof layer and the raft foundation, so that construction is not interfered, water pumping can not be stopped in the whole pouring process, the phenomenon that the drainage pipe penetrates through the foundation to stop drainage in the concrete pouring process is avoided, and the problem that the water leakage exists in the waterproof layer of the raft foundation is avoided; the whole construction operation is safe and reliable, and the quality is guaranteed.
Description
Technical Field
The utility model belongs to the building construction field, concretely relates to underground construction blind well drainage system.
Background
In the construction of the building foundation in the region with abundant underground water, drainage in a foundation pit needs to be continuously pumped in the stages of foundation earthwork excavation, cushion layer construction and basic raft construction, so that normal construction is ensured, and the construction quality is ensured. The traditional construction process mode has the following technical problems: firstly, the secondary pipe wells at the periphery of the raft foundation are used for dewatering, so that the problems of long construction period, difficulty in dewatering and dewatering operation and poor effect exist; and secondly, the drainage pipe of the dewatering well arranged at the bottom of the pit passes through the waterproof layer, interference influence is caused on cushion layer construction, waterproof construction and raft plate steel bar binding, when the raft plate is poured, the drainage pipe is cut off, the drainage pipe is blocked by raft plate concrete, drainage cannot be rapidly blocked, and hidden trouble is caused on the raft plate concrete pouring construction quality.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at: aiming at the problems in the prior art, the underground construction blind well drainage system is provided, the drainage effect of the drainage system is optimized, and the drainage pipe does not penetrate through the waterproof layer and the raft concrete foundation, so that the drainage system is guaranteed not to interfere with construction.
The utility model discloses a following technical scheme:
a drainage system for an underground construction blind well comprises a water collecting pit dug at the lowest part of a deep foundation pit, a water pumping system arranged in the water collecting pit and a drainage ditch dug at the top of the deep foundation pit; the water pumping system comprises a submersible pump, a submersible pump protective shell is covered outside the submersible pump, the height of the submersible pump protective shell is arranged close to the top surface of the sump, a plurality of water inlet holes are formed in the lower portion of the side surface of the submersible pump protective shell at certain intervals, an outlet is formed in the upper portion of the side surface of the submersible pump protective shell and used for discharging a drain pipe of the submersible pump, and an upper cover is arranged on the submersible pump protective shell; the retaining wall around the deep foundation pit is provided with a containing groove for a drainage pipe to be laid to a drainage ditch at the top of the deep foundation pit along the retaining wall, and a layer of cement mortar is coated outside the drainage pipe; the periphery of the submersible pump protective shell of the sump is filled with filter filler, and impermeable cloth is laid on the filter filler; the surface of the retaining wall with the drain pipe installed and the surface of the impermeable cloth are provided with basic cushion layers, the cushion layers are provided with waterproof layers, and concrete protective layers are arranged on the waterproof layers.
Further, the filtering filler is graded pebbles, the grain diameter of the graded pebbles is not less than 20mm, and the water collecting pit is filled with the graded pebbles. The graded pebbles can filter accumulated water, and meanwhile, the effective support is formed on a water pumping system, the particle size of the graded pebbles is limited, the filtering effect of the graded pebbles is ensured, and meanwhile, the situation of unsmooth water pumping cannot occur. And a layer of impermeable cloth is laid between the upper layer of the graded pebbles and the foundation cushion layer, and the impermeable cloth can be geotextile, so that the influence on the gaps of the graded pebbles when the cushion layer is poured is prevented.
Furthermore, a filter screen is arranged around the periphery of the water inlet hole of the submersible pump protective shell. The filter screen can produce effective filtration to intaking, prevents that the sediment is too much to produce the influence to the normal operating of immersible pump.
Further, the drain pipe may be a stainless steel hose. Alternatively, a stainless steel hose can be selected, and the drain pipe is kept at a certain rigidity on the premise of being convenient to lay and is not easy to damage.
Further, the thickness of the cement mortar layer outside the drainage pipe is 50mm-100 mm. The cement mortar layer protects the drain pipe as the protective layer of drain pipe and supports, prevents that basic cushion layer concrete from crushing the drain pipe and influencing the drainage.
Further, the distance between the submersible pump protective shell and the top surface of the sump is 50-100 mm. The submersible pump protective shell is arranged to be away from the top surface of the sump, and can be pre-plugged by utilizing a steel plate or concrete in the later plugging process.
Further, the number of the water pumping systems is at least 2, and the water pumping systems are dispersedly arranged in the water collecting pit. Two water pumping systems are selected to be used as alternatives to each other, so that the situation that a certain water pumping system is in failure and influences the construction is avoided.
Furthermore, the sump pit is 3 slopes, and the water in the deep basal pit of being convenient for gathers into the sump pit bottom.
Owing to adopted above technical scheme, the utility model has the advantages of: the simple and stable water pumping system consisting of the water collecting pit, the water pumping system and the drainage ditch is arranged, and the simple and stable water pumping system has the characteristics of good water pumping effect and strong stability and anti-interference performance; the method breaks through the fixed thinking of the prior art, the drain pipe is arranged below the waterproof layer and the foundation bed course, the drain pipe does not penetrate through the foundation bed course, the waterproof layer and the raft foundation, the construction is not interfered, water pumping can not be stopped in the whole pouring process, and the phenomenon that the drain pipe penetrates through the foundation and needs to stop draining in the concrete pouring process is avoided; meanwhile, the problem that the cushion layer and the waterproof layer are not good in stability in the initial stage of finishing the waterproof construction is avoided, accumulated water is collected too early to be pumped out due to the fact that water pumping is stopped, water pressure is formed to extrude other parts, the stability of the cushion layer and the waterproof layer is damaged, and the leakage problem of the waterproof of the raft foundation is solved; can keep construction environment succinct in this scheme work progress, improve foundation construction's construction quality, solve the difficulty of foundation ditch drainage, just stop the drainage after raft board is pour or foundation ditch periphery is backfilled simultaneously, whole construction operation safe and reliable, the quality is secure.
Drawings
FIG. 1 is a schematic view of the drainage system of the underground construction blind well of the utility model;
in fig. 1, 1 is a sump, 2 is a submersible pump, 3 is a submersible pump protective shell, 4 is a water inlet, 5 is a drain pipe, 6 is a cement mortar layer, 7 is geotextile, 8 is a foundation mat layer, 9 is a waterproof layer, 10 is a protective layer, and 11 is an upper cover.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1, the underground construction blind well drainage system comprises a water collection pit 1 dug in a deep foundation pit, a water pumping system arranged in the water collection pit 1 and a drainage ditch dug at the top of the deep foundation pit; the water pumping system comprises a submersible pump 2, a submersible pump protective shell 3 is arranged outside the submersible pump 2, the height of the submersible pump protective shell is 100mm away from the top surface of the sump, water inlet holes 4 are formed in the lower portion of the side surface of the submersible pump protective shell 3, which is located on the sump 1, at certain intervals, an outlet is formed in the upper portion of the side surface of the submersible pump protective shell 3, a drain pipe 5 of the submersible pump is used for discharging, and a retaining wall around the deep foundation pit is provided with a containing groove for the water supply and drain pipe 5 to be laid to a drainage ditch at the top; the drain pipe 5 is externally coated with a 100mm cement mortar layer 6; the filter filler is filled around the submersible pump protective shell 3 of the sump, the filter filler is graded pebbles, the grain size of the graded pebbles is not less than 20mm, and geotextile 7 is laid on the filter filler; a100 mm concrete foundation bed course 8 is poured on the surface of the retaining wall with the installed drain pipe 5 and the surface of the geotextile 7, a waterproof layer 9 is arranged on the bed course, the waterproof layer is a waterproof coiled material, a 50mm concrete protective layer 10 is arranged on the waterproof layer, and the raft (not shown in the figure) is installed on the concrete protective layer 10.
And a filter screen is arranged around the periphery of the water inlet 4 of the submersible pump protective shell 3. The submersible pump protective shell 3 is provided with an upper cover 11; the upper cover is made by 5mm thick steel plate, for embedded closing cap form, makes the apron carries out detachable the sealing to the immersible pump protective housing, carries out pumping system's maintenance when being convenient for not backfilling. The drain pipe 5 is a stainless steel hose. The sump pit 1 is 3 slopes, and the water in the deep basal pit of being convenient for gathers in sump pit 1 bottom.
In the preferred scheme of this embodiment, the number of pumping systems is 2, and pumping systems are arranged in the sump 1 in a scattered manner. Two pumping systems are selected and can be used as alternatives.
The underground construction blind well drainage system comprises the following construction steps:
1) digging a water collecting pit 1 with the depth of 800 x 800 mm at the lowest part of the deep foundation pit, and digging a drainage ditch at the top of the deep foundation pit;
2) installing a water pumping system with the height of 900mm at the lowest part of the water collecting pit 1 in a dispersing way, digging a containing groove matched with the pipe diameter of a drain pipe 5 on the wall surface of the retaining wall, reserving the spacing distance between the surface of the drain pipe and a basic cushion layer 8, and laying the drain pipe 5 of the water pumping system in the containing groove to the outside of the retaining wall to be communicated with a drain outside the top of the deep foundation pit;
3) the cement mortar layer 6 with the same thickness as the reserved spacing distance of the foundation mat layer 8 is smeared on the surface layer of the drain pipe 5, and the proportion and the quality proportion of the cement mortar are 1: 2; backfilling a filtering filler around the submersible pump protective shell 3 of the sump 1 to be flush with the submersible pump protective shell 3; geotextile 7 is laid on the surface of the filter filler;
4) sequentially pouring a foundation cushion layer 8, a waterproof layer 9, a concrete protective layer 10 and a raft plate layer on the surface of the retaining wall and the surface of the impermeable cloth on which the drain pipe 5 is installed from bottom to top, and reserving a hole of the submersible pump protective shell 3 so as to facilitate the maintenance of a water pump during construction before the raft plate is poured;
5) before pouring the raft foundation, placing a steel plate on the submersible pump protective shell 3 in the hole to pour a local foundation cushion layer to finish water prevention, pouring a concrete protective layer to be consistent with the periphery of the hole, and overlapping, welding and leveling raft bottom ribs on the reserved hole position by raft bottom steel bars;
6) and (4) backfilling the raft pouring foundation pit to finish construction, and not stopping drainage in the process of pouring the raft and backfilling the periphery of the deep foundation pit. Because excessive water accumulation can also occur in the pouring process of the raft, if a conventional drainage measure is adopted, the drainage device can be damaged and cannot drain water; but the adoption of the method can continuously drain water, and prevent the cushion layer, the waterproof layer, the protective layer and the raft from being extruded and damaged due to overlarge water pressure.
The construction is carried out and water is drained by adopting the construction steps, the submerged pump 2 pumps accumulated water in the water collecting pit out, and the accumulated water is drained into a drainage ditch at the top of the deep foundation pit through the drainage pipe 5. The immersible pump 2 need design suitable displacement and lift height, drain pipe 5 does not pass basic bed course 8, waterproof layer 9, raft foundation, do not disturb the construction, the problem of the waterproof seepage of raft foundation can not appear, the construction quality of foundation construction has been improved, the difficulty of foundation ditch drainage has been solved, can stop to fall the drainage after raft is pour or foundation ditch periphery is backfilled simultaneously, in the whole construction operation process, foundation ditch construction safe and reliable has stopped the quality risk of raft foundation concrete seepage, the quality is secure.
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 (8)
1. The utility model provides an underground construction blind well drainage system which characterized in that: the system comprises a water collecting pit dug at the lowest part of a deep foundation pit, a water pumping system arranged in the water collecting pit and a drainage ditch dug at the top of the deep foundation pit; the water pumping system comprises a submersible pump, a submersible pump protective shell is covered outside the submersible pump, the height of the submersible pump protective shell is arranged close to the top surface of the sump, a plurality of water inlet holes are formed in the lower portion of the side surface of the submersible pump protective shell at certain intervals, an outlet is formed in the upper portion of the side surface of the submersible pump protective shell and used for discharging a drain pipe of the submersible pump, and an upper cover is arranged on the submersible pump protective shell; the retaining wall around the deep foundation pit is provided with a containing groove for a drainage pipe to be laid to a drainage ditch at the top of the deep foundation pit along the retaining wall, and a layer of cement mortar is coated outside the drainage pipe; the periphery of the submersible pump protective shell of the sump is filled with filter filler, and impermeable cloth is laid on the filter filler; the surface of the retaining wall with the drain pipe installed and the surface of the impermeable cloth are provided with basic cushion layers, the cushion layers are provided with waterproof layers, and concrete protective layers are arranged on the waterproof layers.
2. An underground construction blind well drainage system according to claim 1, wherein: the filtering filler is graded pebbles, the grain size of the graded pebbles is not less than 20mm, and the periphery of the submersible pump protective shell of the sump is filled with the graded pebbles.
3. An underground construction blind well drainage system according to claim 1, wherein: and a filter screen is arranged around the periphery of the water inlet of the submersible pump protective shell.
4. An underground construction blind well drainage system according to claim 1, wherein: the thickness of the cement mortar layer outside the drainage pipe is 50-100 mm.
5. An underground construction blind well drainage system according to claim 1, wherein: the distance between the submersible pump protective shell and the top surface of the sump is 50-100 mm.
6. An underground construction blind well drainage system according to claim 1, wherein: the number of the water pumping systems is at least 2, and the water pumping systems are dispersedly arranged in the water collecting pit.
7. An underground construction blind well drainage system according to claim 1, wherein: the sump is 3 degrees of slope.
8. An underground construction blind well drainage system according to any one of claims 1 to 7, wherein: the drain pipe is a stainless steel hose.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920849702.5U CN210395389U (en) | 2019-06-05 | 2019-06-05 | Underground construction blind well drainage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920849702.5U CN210395389U (en) | 2019-06-05 | 2019-06-05 | Underground construction blind well drainage system |
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| CN210395389U true CN210395389U (en) | 2020-04-24 |
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| CN201920849702.5U Active CN210395389U (en) | 2019-06-05 | 2019-06-05 | Underground construction blind well drainage system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
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2019
- 2019-06-05 CN CN201920849702.5U patent/CN210395389U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110219313A (en) * | 2019-06-05 | 2019-09-10 | 中国五冶集团有限公司 | A kind of underground construction blind shaft drainage system and construction method |
| CN110219313B (en) * | 2019-06-05 | 2024-01-30 | 中国五冶集团有限公司 | Drainage system and construction method for underground construction blind well |
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