A foundation pit supporting based organization drainage structure

Abstract

The utility model discloses an organization drainage structure based on foundation pit support, including the drainage ditch of setting on the crown beam of the support structure in the foundation pit, one side of drainage ditch is close to the road setting of foundation pit side and is set on the side wall of reinforced concrete retaining wall in close fit, the position of drainage ditch sets up a water collecting well every 30-50m, and water collecting well also sets up on the crown beam, and is connected with drainage ditch, the corner of foundation pit triangle support beam region sets up reinforced concrete trestle board, is equipped with the sedimentation tank on the reinforced concrete trestle board, and the both sides of sedimentation tank are connected with drainage ditch respectively, the whole organization drainage structure (drainage ditch + water collecting well + three -level sedimentation tank) in the construction site of the utility model is placed in the foundation pit protection sideline, and the land area of construction site is reduced to the organization drainage structure.

Description

Technical Field

[0001] This utility model relates to the field of building foundation pit construction technology, specifically to a drainage structure based on foundation pit support. Background Technology

[0002] In the field of construction engineering, it is common to encounter situations where the foundation pit area is large, the construction site is small, and the roads around the foundation pit and the main construction entrances and exits are narrow. Traditional drainage ditches are usually set about 1000 cm outside the top edge of the foundation pit. Because they occupy about 1000 cm of space outside the top edge of the foundation pit, the ring road around the foundation pit cannot meet the minimum width requirements.

[0003] To address this issue, a drainage structure based on foundation pit support beams is proposed to solve the aforementioned practical problems in existing construction. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a drainage organization structure based on foundation pit support, so that the drainage organization structure at the construction site does not occupy the roads around the foundation pit or other ground land.

[0005] The technical solution of this utility model is as follows: A drainage structure based on foundation pit support includes a drainage ditch installed on the capping beam of the support structure within the foundation pit; one side of the drainage ditch is located near the road along the edge of the foundation pit and is fitted onto the side wall of a reinforced concrete retaining wall; a collection well is installed every 30-50 meters at the location of the drainage ditch, and the collection well is also located on the capping beam and connected to the drainage ditch; a reinforced concrete trestle is installed in the triangular support beam area at the corner of the foundation pit, and a sedimentation tank is provided on the reinforced concrete trestle, with both sides of the sedimentation tank connected to the drainage ditch.

[0006] Furthermore, the sedimentation tank is a bidirectional flow three-stage sedimentation tank, which is triangular in shape and has a total of four tanks, including three tanks located at the three vertices of the triangle and one tank located at the center of the triangle.

[0007] Furthermore, the two outermost pools of the sedimentation tank are the first-stage sedimentation tanks, which are connected to the drainage ditches on both sides; the one in the center is the second-stage sedimentation tank, which is connected to the first-stage sedimentation tank; the remaining one is the third-stage sedimentation tank, which is connected to the second-stage sedimentation tank; and the third-stage sedimentation tank is connected to the municipal pipe network through a water pump or an underground culvert.

[0008] Furthermore, the drainage channel is fixed to the cap beam through the drainage ditch support, and the surface elevation of the drainage ditch is lower than the road surface elevation of the road next to the foundation pit. The water on the road next to the foundation pit is diverted to the drainage ditch through the slope.

[0009] Furthermore, the water collection well is fixed to the cap beam by a water collection well bracket, and the elevation of the drainage ditch surface is flush with the elevation of the water collection well surface. The dewatering in the foundation pit is pumped to the drainage ditch or water collection well by a water pump.

[0010] Furthermore, mortar is filled between the drainage ditch and the reinforced concrete retaining wall for sealing.

[0011] Furthermore, the drainage ditch adopts a prefabricated structure, with each section being 3-5 meters long. The water collection well can also adopt a prefabricated structure, which facilitates recycling and reuse.

[0012] The beneficial effects of this utility model are as follows: 1) The entire drainage system (drainage ditch + collection well + three-stage sedimentation tank) within the construction site was placed inside the perimeter of the foundation pit retaining wall, which reduced the land area occupied by the drainage system and thus increased the land area of ​​the construction site.

[0013] 2) The bidirectional flow three-stage sedimentation tank is set at the corner of the foundation pit, which does not affect the normal construction inside the foundation pit and facilitates water collection and drainage.

[0014] 3) Compared with the traditional unidirectional flow three-stage sedimentation tank, the bidirectional flow three-stage sedimentation tank has a higher sedimentation efficiency for the same discharge volume.

[0015] 4) The drainage ditches and collection wells adopt a prefabricated structure, which can be recycled and reused multiple times, and can be used in multiple projects, reducing construction costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a diagram showing the location distribution of the sedimentation tanks in this utility model; Figure 3 This is a schematic diagram showing the connection between the water collection well and the drainage ditch of this utility model; Figure 4 This is a schematic diagram of the sedimentation tank structure of this utility model; In the diagram: 1. Excavation pit; 2. Support structure; 3. Mixing pile; 4. Support fixing anchor bolt; 5. Crown beam; 6. Reinforced concrete retaining wall; 7. Drainage ditch support; 8, 9, 901, First-stage sedimentation tank; 902, Second-stage sedimentation tank; 903, Third-stage sedimentation tank; 10. Collection well; 11. Collection well support. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. Example

[0018] like Figure 1-4As shown, a drainage structure based on foundation pit support is described below: a drainage ditch 8 is erected on the cap beam 5 of the support structure 2 of the foundation pit 1 via a drainage ditch support 7. The drainage ditch 8 is located near the side of the reinforced concrete retaining wall 6 and is sealed with mortar between itself and the reinforced concrete retaining wall 6. The surface elevation of the drainage ditch 8 is slightly lower than the road surface elevation of the road around the foundation pit, and it can be used as road surface drainage for the road around the foundation pit.

[0019] Drainage ditch 8 can adopt a prefabricated structure, with each section being 3-5 meters long (adjacent drainage ditches are connected via a male-female joint). An 800x800 water collection well is installed every 30-50 meters in the drainage ditch for initial sedimentation of sand from the road surface and foundation pit water. Water collection well 10 can also adopt a prefabricated structure (with interfaces matching the drainage ditch on both sides). The water collection well can be made of the same material as the drainage ditch and is reusable. It is placed on the capping beam 5 of the support structure via a water collection well bracket 11 and assembled with the drainage ditch (sealing should be applied at the connection point). The elevation of the drainage ditch surface is flush with the elevation of the water collection well surface.

[0020] At the triangular support beam area at the corner of the foundation pit, a reinforced concrete trestle slab approximately 15cm thick should be constructed. (If the foundation pit retaining structure is already designed as a trestle slab, then the existing trestle slab structure should be utilized). A "bidirectional flow three-stage sedimentation tank" should be constructed on the reinforced concrete trestle slab, allowing access to drainage ditches on both sides. The "bidirectional flow three-stage sedimentation tank" is generally a triangular structure (other structures can be designed according to actual conditions). It typically consists of four tanks: the two outermost tanks are the first-stage sedimentation tanks, connected to the drainage ditches on both sides. The middle tank is the second-stage sedimentation tank, and water then flows into the third-stage sedimentation tank closest to the corner. The third-stage sedimentation tank is connected to the municipal sewer network via a pump or an under-street culvert. Dewatering from the foundation pit is pumped to drainage ditches or collection wells; surface water is diverted to drainage ditches via a slope. The water flows through the drainage ditches to the three-stage sedimentation tanks at the four corners of the foundation pit. After three-stage sedimentation, the water is discharged into the municipal sewer network after meeting standards. Note: Water quality must be checked regularly during discharge to ensure it meets local municipal sewer network discharge requirements.

[0021] Construction process: 1. Calculate and configure the length of the prefabricated drainage ditch and the number of water collection wells corresponding to the length of the foundation pit cap beam, and calculate and configure the height and number of the lower support of the drainage ditch; after the cap beam is completed, transport it to the construction site.

[0022] 2. Install drainage ditches and collection wells. A mortise and tenon joint should be installed at the junction of the drainage ditches. Sealant should be applied to the inside of the mortise and tenon joints to ensure a leak-proof seal. Similarly, sealant should be applied to the connection between the drainage ditch and the collection well to ensure a leak-proof seal.

[0023] 3. Construct a "bidirectional flow three-stage sedimentation tank" using solid concrete bricks; plaster the inside of the sedimentation tank with waterproof mortar, cure for 7 days, and then conduct a water storage test. It can be put into use only if there is no leakage after 48 hours of water storage.

[0024] 4. During use, rainwater from the road surface and dewatering from the foundation pit are collected in the drainage ditch. The sand is initially settled through the collection well, and the water is then collected from the drainage ditch into the "bidirectional flow three-stage sedimentation tank". After three-stage sedimentation, it is discharged into the municipal pipe network through a culvert.

[0025] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A drainage structure based on foundation pit support, characterized in that, The structure includes a drainage ditch installed on the capping beam of the support structure within the foundation pit; one side of the drainage ditch is located near the road along the edge of the foundation pit and is fitted onto the side wall of the reinforced concrete retaining wall; a collection well is installed every 30-50 meters at the location of the drainage ditch, and the collection well is also located on the capping beam and connected to the drainage ditch; a reinforced concrete trestle is installed in the triangular support beam area at the corner of the foundation pit, and a sedimentation tank is installed on the reinforced concrete trestle, with both sides of the sedimentation tank connected to the drainage ditch.

2. The drainage structure based on foundation pit support according to claim 1, characterized in that, The sedimentation tank is a bidirectional flow three-stage sedimentation tank. The sedimentation tank is triangular in shape and has a total of four tanks, including three tanks located at the three vertices of the triangle and one tank located at the center of the triangle.

3. The drainage structure based on foundation pit support according to claim 2, characterized in that, The two outermost pools of the sedimentation tank are the first-stage sedimentation tanks, which are connected to the drainage ditches on both sides; the one in the center is the second-stage sedimentation tank, which is connected to the first-stage sedimentation tank; the remaining one is the third-stage sedimentation tank, which is connected to the second-stage sedimentation tank. The third-stage sedimentation tank is connected to the municipal pipe network through a water pump or an underground culvert.

4. The drainage structure based on foundation pit support according to claim 1, characterized in that, The drainage channel is fixed to the cap beam through the drainage ditch support. The surface elevation of the drainage ditch is lower than the road surface elevation of the road next to the foundation pit. The water on the road next to the foundation pit is diverted to the drainage ditch through the slope.

5. A drainage structure based on foundation pit support according to claim 1, characterized in that, The water collection well is fixed to the cap beam by a water collection well bracket. The elevation of the drainage ditch surface is flush with the elevation of the water collection well surface. The dewatering in the foundation pit is pumped to the drainage ditch or water collection well by a water pump.

6. A drainage structure based on foundation pit support according to claim 1, characterized in that, The space between the drainage ditch and the reinforced concrete retaining wall is filled with mortar for sealing.

7. A drainage structure based on foundation pit support according to claim 1, characterized in that, The drainage ditch adopts a prefabricated structure, and each section of the drainage ditch is 3-5 meters long.

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