Water collecting well capable of rapidly and locally dewatering and reducing cost

Abstract

The utility model relates to a water collecting well capable of rapidly and locally dewatering and reducing cost. The water-collecting well capable of rapidly and locally dewatering and reducing the cost comprises a drainage assembly, a graded gravel layer and an impermeable membrane, the drainage assembly comprises a plurality of water absorption filter pipes, a plurality of protection steel pipes, a connecting assembly and a vacuum pump, the protection steel pipes are arranged on the water absorption filter pipes in a sleeving mode, the water absorption filter pipes are connected with the vacuum pump through the connecting assembly, and the water absorption filter pipes are connected with the impermeable membrane through the connecting assembly. Therefore, underground water around the bottom of the foundation is pumped to the ground to be discharged, and the purpose of dewatering is achieved. According to the water-collecting well structure capable of rapidly and locally dewatering and reducing the cost, the graded sandstone layer is arranged above the water absorption filter pipe to filter underground water, the impermeable film is arranged above the graded sandstone layer to prevent the damage to the foundation bed layer and the waterproof layer due to the too high underground water level, the construction is convenient, the construction method is simple and convenient to operate, the sandstone water filter layer is arranged by over-digging for 50 centimeters, and the construction efficiency is improved. The rainfall effect is guaranteed by adjusting the number of the water absorption filter pipes, excessive construction time is not needed, and the construction period can be greatly shortened.

Description

Technical Field

[0001] The utility model belongs to the technical field of construction engineering, and particularly relates to a water collection well with rapid local precipitation and reduced costs. Background Art

[0002] Currently, building construction projects generally use deep foundation pits during the foundation construction phase, often requiring dewatering measures. The dewatering depth of deep foundation pits is generally controlled to 50 cm below the foundation pit surface, which can effectively ensure that no visible water appears on the large surface of the foundation pit. However, building construction projects now generally have sump pits and elevator pits at the foundation site. The depth of the pits is generally 1.5-2 m lower than the main building foundation pit. Therefore, when constructing sump pits and elevator shafts, visible water often appears at the bottom of the foundation pit, seriously affecting construction quality and progress. To address this series of problems, we have proposed a sump pit that can quickly and locally dewater and reduce costs. Utility Model Content

[0003] The purpose of the utility model is to provide a water collection well with rapid local precipitation and reduced costs, so as to solve the technical problem that clear water often appears at the bottom of the foundation pit during the construction of water collection pits and elevator shafts, which seriously affects the construction quality and progress.

[0004] In order to achieve the above objectives, the technical solution adopted by the utility model is:

[0005] A water collection well with rapid local precipitation and reduced costs comprises a drainage assembly, a graded sand and gravel layer and an impermeable membrane. The drainage assembly comprises a plurality of water absorption filter pipes, a plurality of protective steel pipes, a connecting assembly and a vacuum pump. The protective steel pipes are sleeved on the water absorption filter pipes, and the water absorption filter pipes are connected to the vacuum pump via the connecting assembly, thereby pumping groundwater around the bottom of the foundation to the ground for discharge, thereby achieving the purpose of precipitation. The graded sand and gravel layer is arranged above the water absorption filter pipes to filter groundwater, and the impermeable membrane is arranged above the graded sand and gravel layer to prevent excessive groundwater level from damaging the foundation cushion layer and waterproofing.

[0006] Furthermore, the water suction filter pipe consists of a buried section and an exposed section. The buried section of the water suction filter pipe is fully opened and wrapped with gauze to prevent clogging. The buried section of the water suction filter pipe is arranged below the graded sand and gravel layer, and the exposed section of the water suction filter pipe is connected to the connecting assembly.

[0007] Furthermore, the plurality of water absorption filter tubes are parallel to each other.

[0008] Furthermore, the protective steel pipe consists of a buried protective steel pipe section and an exposed protective steel pipe section. Holes are opened around the buried protective steel pipe section, which protects the water absorption filter tube without affecting the water pumping rate of the vacuum pump.

[0009] Furthermore, the connecting assembly includes a longitudinal tube and a transverse tube, the longitudinal tube is connected to the exposed section of the water suction filter tube, the left end of the transverse tube is connected to the longitudinal tube, and the right end of the transverse tube is connected to the vacuum pump.

[0010] Beneficial effects of the utility model:

[0011] The water collection well structure of the utility model with rapid local precipitation and reduced cost has a wide range of applications and is suitable for all geological conditions with a permeability coefficient of less than 20.0 m / d.

[0012] The water collection well structure of this utility model is convenient to construct for rapid local precipitation and cost reduction. The construction method is simple to operate. It adopts the method of over-excavating 50 centimeters to arrange the graded sand and gravel layer. The precipitation effect is ensured by adjusting the number of water-absorbing filter pipes. It does not require too much construction time and can greatly save construction period.

[0013] The utility model has a fast local precipitation and cost-reducing water collection well structure with good construction quality, can effectively lower the groundwater level, prevent excessive water pressure from damaging the waterproof layer and the cushion layer, and can effectively ensure the construction quality before the raft slab is poured.

[0014] The utility model has a low overall cost for the water collection well structure that can quickly and locally dewater and reduce costs. Compared with traditional light well point dewatering, it reduces the processes of drilling and punching holes in the well pipe, directly excavates in place, and reduces the high cost of drilling holes.

[0015] The utility model has a quick local precipitation and cost-reducing water collection well structure and is safe and civilized to construct. This construction method adopts a direct mechanical excavation construction method, which eliminates the long construction time of the hole-making machinery and greatly shortens the construction time of the machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic plan view of a water collection well for rapid local precipitation and cost reduction in Example 1;

[0017] Figure 2 This is a schematic cross-sectional view of a water collection well for rapid local precipitation and cost reduction in Example 1.

[0018] In the figure: 1. Graded sand and gravel layer; 2. Anti-seepage membrane; 3. Water absorption filter pipe; 4. Protective steel pipe; 5. Vacuum pump; 6. Buried section of water absorption filter pipe; 7. Exposed section of water absorption filter pipe; 8. Buried section of protective steel pipe; 9. Exposed section of protective steel pipe; 10. Longitudinal pipe; 11. Transverse pipe; 12. T-joint; 13. Brick formwork. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The implementation of the water collection well of the utility model with rapid local precipitation and reduced cost is as follows: Figure 1-2 shown.

[0021] Example 1

[0022] A water collection well for rapid local precipitation and reduced costs, comprising a drainage component, a graded sand and gravel layer 1 and an impermeable membrane 2, the drainage component comprising a plurality of water absorption filter pipes 3, a plurality of protective steel pipes 4, a connecting component and a vacuum pump 5, the protective steel pipe 4 being sleeved on the water absorption filter pipe 3, the water absorption filter pipe 3 being connected to the vacuum pump 5 through the connecting component, thereby pumping groundwater around the bottom of the foundation to the ground for discharge, thereby achieving the purpose of precipitation; the graded sand and gravel layer 1 must be fully stirred to meet the bearing capacity requirements of the main building and be able to filter groundwater, the graded sand and gravel layer 1 is arranged above the water absorption filter pipe 3 to filter groundwater; the impermeable membrane 2 is a polyethylene impermeable membrane, the thickness and flexibility of the polyethylene impermeable membrane must meet the requirements to ensure that it will not be damaged by gravel, and it has an effective impermeable effect, the overlap can be effectively connected and has good sealing, the impermeable membrane 2 is arranged above the graded sand and gravel layer 1 to prevent the high groundwater level from damaging the foundation cushion and waterproofing.

[0023] The water suction filter pipe 3 consists of a water suction filter pipe buried section 6 and a water suction filter pipe exposed section 7. The water suction filter pipe buried section 6 is fully opened and wrapped with gauze to prevent clogging. The water suction filter pipe buried section 6 is arranged below the graded sand and gravel layer 1, and the water suction filter pipe exposed section 7 is connected to the connecting assembly.

[0024] The plurality of water absorption filter tubes 3 are parallel to each other.

[0025] The protective steel pipe 4 is composed of a protective steel pipe buried section 8 and a protective steel pipe exposed section 9. The protective steel pipe 4 uses a Q355b galvanized steel pipe, and holes are opened around it. The protective steel pipe buried section 8 is opened around it, under the action of the protective water absorption filter tube 3 without affecting the water pumping rate of the vacuum pump 5.

[0026] The connecting assembly includes a longitudinal tube 10 and a transverse tube 11. The longitudinal tube 10 and the transverse tube 11 must be compatible with the model of the water absorption filter tube 3 and have good sealing performance. They can withstand the water pressure of the vacuum pump 5 and there are no leakage or opening problems. The longitudinal tube 10 is connected to the exposed section 7 of the water absorption filter tube through a three-way joint 12. The left end of the transverse tube 11 is connected to the longitudinal tube 10, and the right end of the transverse tube 11 is connected to the vacuum pump 5.

[0027] Working principle of this water collection well for rapid localized precipitation and cost reduction:

[0028] Different from the common precipitation method currently on the market, this method adopts excavation first and then precipitation, changing the logical relationship between the processes, and then accurately determining the required precipitation discharge volume based on the plane shape and size of the foundation pit, geological and hydrological conditions, and the on-site measured infiltration rate, and appropriately setting a certain redundancy coefficient based on local weather conditions to reduce the number of precipitation suction filter pipes 3 and the extraction time of the vacuum pump 5.

[0029] The specific approach is to first analyze and summarize the excavation size of the water collection well when preparing the dewatering project construction plan: (1) Use the geological survey report to understand the soil quality at the location of the water collection well in advance and check the permeability coefficient of the soil; (2) Determine the excavation size (after expanding 50 cm outward) and depth of the water collection well according to the slope requirements of the structural drawings; (3) Calculate the daily flow rate of the water collection well based on the excavation area and leakage coefficient, and draw a dewatering schematic diagram of the water collection well.

[0030] Secondly, guide on-site construction according to the construction plan:

[0031] Position and lay out the lines according to the expanded dimensions of the water collection well in the precipitation plan, and control the lines;

[0032] (1) Carry out earthwork excavation according to the existing control line and conduct real-time verification according to the elevation control points. During the non-construction period, the water collection well should be covered to prevent other water sources from flowing in;

[0033] (2) Determine the permeability coefficient of the water collection well circumference according to the excavation drawings, calculate the maximum precipitation required per day, and determine the number of water absorption filter pipes 3 required;

[0034] (3) According to the calculated amount, water absorption filter pipes 3 are arranged on the side walls and bottom of the foundation pit, and are uniformly connected to the outside of the foundation pit raft brick formwork 13, and are uniformly connected using hoses, and finally a vacuum pump 5 is installed to pump water;

[0035] (4) Use steel mesh to protect the buried part of the filter pipe, and use 3:7 graded sand and gravel to backfill the over-excavation of 50 cm and tamp it tightly to ensure that the foundation bearing capacity requirements are met;

[0036] (5) A 5 mm thick polyethylene anti-seepage membrane is laid on the surface of the graded sand and gravel layer 1, and a concrete cushion layer and a brick formwork 13 are poured. Before the raft slab is poured, the vacuum pump 5 is kept in working condition to ensure that the water level is below the bottom of the water collection well.

[0037] Finally for precipitation maintenance:

[0038] (1) To ensure the effectiveness of precipitation, a special water level survey well is arranged on the outside of the raft. Once the water level exceeds the warning level, precipitation measures are immediately initiated.

[0039] (2) In order to avoid ineffective precipitation time, a special person is assigned to monitor the water level of the precipitation area for 24 hours to ensure that the water level remains below 50 cm in the foundation pit for a long time, and the vacuum pump 5 is inspected and repaired to ensure the normal operation of the vacuum pump 5.

[0040] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0041] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

Claims

1. A water collection well for rapid local precipitation and reduced costs, characterized by: It includes a drainage component, a graded sand and gravel layer and an anti-seepage membrane. The drainage component includes multiple water-absorbing filter pipes, multiple protective steel pipes, a connecting component and a vacuum pump. The protective steel pipe is sleeved on the water-absorbing filter pipe, and the water-absorbing filter pipe is connected to the vacuum pump through the connecting component, so as to pump the groundwater around the bottom of the foundation to the ground and discharge it, thereby achieving the purpose of precipitation; the graded sand and gravel layer is arranged above the water-absorbing filter pipe to filter groundwater, and the anti-seepage membrane is arranged above the graded sand and gravel layer to prevent the groundwater level from being too high to damage the foundation cushion layer and waterproofing.

2. The water collection well with rapid local precipitation and reduced cost according to claim 1, characterized in that: The water suction filter pipe consists of a buried section and an exposed section. The buried section is fully opened and wrapped with gauze to prevent clogging. The buried section is arranged below the graded sand and gravel layer. The exposed section is connected to the connecting assembly.

3. The water collection well for rapid local precipitation and reduced cost according to claim 1, characterized in that: The plurality of water absorption filter tubes are parallel to each other.

4. The water collection well for rapid local precipitation and reduced cost according to claim 2, characterized in that: The protective steel pipe consists of a buried section and an exposed section. The buried section is perforated to protect the water-absorbing filter pipe without affecting the water pumping rate of the vacuum pump.

5. The water collection well for rapid local precipitation and reduced cost according to claim 2, characterized in that: The connecting assembly includes a longitudinal tube and a transverse tube. The longitudinal tube is connected to the exposed section of the water suction filter tube. The left end of the transverse tube is connected to the longitudinal tube, and the right end of the transverse tube is connected to the vacuum pump.

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