CN219045167U - A Submersible Groundwater Drainage System - Google Patents

Abstract

The invention provides a submerged groundwater drainage system, which belongs to the technical field of drainage systems. The invention includes: an enclosure structure, which is arranged on the outside of the structural wall, and has a built-in drainage pipe; a structural bottom plate, which is arranged on the ground between the structural walls; an under-board drainage blind ditch is opened under the structural bottom plate, close to the structural wall There is a wall catchment ditch connected with the drainage blind ditch under the slab; the drainage pipe is connected with the catchment ditch at the wall; the blind drainage ditch under the slab forms a drainage slope from the middle to the surroundings, so that the groundwater Flow to the water catchment ditch beside the wall; both the blind drainage ditch under the slab and the water catchment ditch beside the wall are filled with permeable materials. The invention can effectively solve the technical problems of drainage and anti-floating of the underground structure in the construction stage and the permanent use stage.

Description

A Submersible Groundwater Drainage System

technical field

The utility model relates to the technical field of drainage systems, in particular to a submerged groundwater drainage system, in particular to a submersible groundwater drainage system utilizing an enclosure structure.

Background technique

In areas with high water levels, underground structures must take measures to deal with groundwater problems during both the construction phase and the permanent use phase.

In the construction stage, the existing technology generally uses tube wells or other dewatering measures to pump down the submerged groundwater, so that the water level of the submerged groundwater is lower than the construction work surface, so as to meet the safety requirements of foundation pit excavation and structural floor construction. In order to meet the anti-floating stability during the construction of the entire structure, the dewatering well often needs to be reserved until the completion of the underground structure restoration. Therefore, the project often faces the problem that the tube well needs to pass through the bottom plate structure. When the tube well passes through the bottom plate, the steel reinforcement of the bottom plate will be cut off, which will not only cause local weakening of the bottom plate structure, but also the position of the well wall will often become an important channel for the leakage of the bottom plate, which will affect the safety of the underground structure. However, some special underground structures have extremely high requirements on the integrity and water-tightness of the structure, such as LNG underground storage tanks, nuclear power underground structures, high-frequency ray test device underground structures, etc. Tube wells passing through the floor structure will greatly increase the risk of permanent use .

In the permanent use stage, the existing technology generally adopts measures such as increasing the self-weight of the structure, setting uplift piles or uplift anchors, and permanent pressure relief and drainage systems for the bottom plate to meet the permanent anti-floating stability of the structure. When the bottom plate permanent pressure relief and drainage system is adopted, the problem of drainage pipes passing through the bottom plate will be faced, and other measures will greatly increase the structural construction cost and construction period.

Utility model content

In view of this, in order to solve the technical problems in the above-mentioned background technology, the utility model provides a submersible groundwater drainage system, which can effectively solve the drainage and anti-floating technical problems of underground structures in the construction phase and permanent use phase.

In order to solve the problems of the technologies described above, the utility model provides the following technical solutions:

A submersible groundwater drainage system comprising:

Enclosure structure, which is arranged on the outside of the structural wall, and has a built-in drainage pipe, which is used for retaining soil in foundation pit support engineering;

a structural floor disposed on the ground between said structural walls;

An under-board drainage blind ditch is opened under the structural bottom plate, and a wall catchment ditch connected with the under-board drainage blind ditch is opened near the structural wall;

The drainage pipe is connected with the water catchment ditch at the side of the wall;

The drainage blind ditch under the board forms a drainage slope with a high middle part and a low surrounding area from the middle part to the surroundings, so that the groundwater flows to the catchment ditch at the side of the wall;

Both the drainage blind ditch under the slab and the water catchment ditch at the side of the wall are filled with permeable materials.

Preferably, the enclosure structure is one of cast-in-place piles, cast-in-place underground continuous walls, occlusal piles, prefabricated piles and prefabricated walls.

Preferably, a reinforcement cage groove is arranged in the enclosure structure, and the drainage pipe is fixed in the reinforcement cage groove.

Preferably, the reinforcement cage groove is enclosed by horizontal frames and vertical bars.

Preferably, the under-board drainage blind ditch is a U-shaped groove.

Preferably, the water-permeable material is covered with a waterproof layer.

Preferably, the wall-side catchment ditch is covered with a waterproof layer.

Preferably, a strainer is provided at the connection between the drainage pipe and the wall gutter.

Preferably, a water stop is also provided at the connection between the drainage pipe and the wall gutter.

The submersible groundwater drainage system provided by the utility model can effectively solve the technical problems of drainage and anti-floating of the underground structure in the construction stage and the permanent use stage.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Figure 2 is a schematic diagram (A-A) of the planar layout of the built-in drainage pipes and reinforcement cage grooves of the wall enclosure structure;

Figure 3 is a schematic diagram (B-B) of the planar layout of the built-in drainage pipes and reinforcement cage grooves of the wall enclosure structure;

Figure 4 is a schematic diagram (A-A) of the layout of the built-in drainage pipes and reinforcement cage grooves of the pile enclosure structure;

Figure 5 is a schematic diagram (B-B) of the layout of the built-in drainage pipe and steel cage groove of the pile enclosure structure;

Figure 6 is a schematic diagram of the drainage blind ditch under the plate;

Fig. 7 is a schematic diagram of the connection between the wall catchment ditch and the drainage pipe;

In the figure, 1. Enclosure structure, 2. Structural wall, 3. Structural floor, 4. Enclosure structure reinforcement cage, 10. Reinforcement cage groove, 11. Horizontal frame, 12. Vertical reinforcement, 13. Reinforcing reinforcement, 20 . Drainage pipe, 21. Horizontal drainage interface, 22. Filter screen, 23. Waterstop, 30. Drainage blind ditch under the board, 31. Water catchment ditch by the wall, 32. Permeable material, 34. Waterproof layer.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, those skilled in the art can obtain all other Embodiments all belong to the protection scope of the utility model.

In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top/bottom" etc. are based on the Orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the utility model. limit.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "set with", "sleeve/connection", "connection", etc. should be understood in a broad sense, for example "Connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be two components Internal connectivity. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

As shown in Figure 1-7, the utility model provides a submersible groundwater drainage system, including:

Enclosure structure 1, which is arranged on the outside of structural wall 2, and has built-in drainage pipe 20, which is used for retaining soil in foundation pit support engineering;

A structural bottom plate 3, which is arranged on the ground between the structural walls 2;

An under-board drainage blind ditch 30 is opened under the structural bottom plate 3, and a wall catchment ditch 31 connected with the under-board drainage blind ditch 30 is opened near the structural wall 3;

The drainage pipe 20 is in communication with the wall catchment ditch 31;

The drainage blind ditch 30 under the plate forms a drainage slope with a high middle part and a low surrounding area from the middle part to the surroundings, so that groundwater flows to the wall catchment ditch 31;

Both the under-board drainage blind ditch 30 and the wall catchment ditch 31 are filled with water-permeable materials 32 .

In the above-mentioned submerged groundwater drainage system provided by the utility model, the drainage blind ditch 30 under the plate forms a drainage slope with a high middle part and a low surrounding area from the middle part to the surroundings, forming a gravity drainage channel, so that the groundwater flows to the wall catchment ditch 31;

Preferably, the water catchment ditch 31 at the edge of the wall is arranged along the inner edge of the enclosure structure 1, communicates with the blind drainage ditch 30 under the board, and the bottom is lower than the blind drainage ditch 30 under the board;

The drainage pipe 20 is preferably a circular or square pipe, and the material of the drainage pipe 20 can be metal or organic material. vertically arranged along the inner side of the enclosure structure 1;

The top of the drain pipe 20 is flush with the ground, and the top of the drain pipe 20 is provided with nozzle protection to prevent surface water or sundries from entering the pipe. The elevation of the bottom of the drainage pipe 20 is lower than the bottom surface of the structural floor, and the bottom surface of the pipe is sealed and waterproof;

In the present utility model, the horizontal drainage interface 21 on the drainage pipe 20 is connected with the water catchment ditch 31 at the side of the wall;

In the utility model, the enclosure structure 1 is one of cast-in-place piles, cast-in-place underground continuous walls, occlusal piles, prefabricated piles and prefabricated walls.

In the utility model, the enclosure structure 1 is provided with a reinforcement cage groove 10, preferably the reinforcement cage groove 10 is fixed on the enclosure structure reinforcement cage 4 of the enclosure structure 1, and the drain pipe 20 is fixed on the reinforcement cage In the cage groove 10.

In the present invention, the reinforcement cage groove 10 is enclosed by a horizontal frame 11 and a vertical bar 12, and is preferably composed of horizontally and vertically combined steel bars or shaped steel.

In the present utility model, the under-board drainage blind ditch 30 is a U-shaped groove.

In the present invention, the water-permeable material 32 is covered with a waterproof layer 34, and the water-permeable material is preferably sand, stone or other materials with water-permeable function.

In the present utility model, the wall catchment ditch 31 is covered with a waterproof layer 34 .

In the present utility model, the waterproof layer 34 can adopt materials with waterproof functions such as organic waterproof coiled material, cement-based waterproof layer or waterproof blanket.

In order to prevent sundries from entering the pipe during concrete pouring and earthwork excavation, in the present invention, a filter screen 22 is provided at the connection between the drain pipe 20 and the wall catchment ditch 31 .

In order to prevent groundwater from entering the inside of the enclosure structure 1, in the present utility model, a water stop 23 is also provided at the connection between the drain pipe 20 and the wall catchment ditch 31, preferably around the horizontal drainage interface 21. Waterstop 23.

In the utility model, the horizontal drainage interface 21 is an interface opened by cutting off the reinforcement cage 4 of the enclosure structure, and reinforcing ribs 13 are arranged at the cut-off place.

The utility model also provides the construction method of the above-mentioned submerged groundwater drainage system, and its specific steps are as follows:

The first step, make the enclosure structure reinforcement cage 4 of enclosure structure 1, install reinforcement cage groove 10 and drainpipe 20, install nozzle protection (filter screen 22) and water stopper 23; Wherein nozzle protection is preferably can adopt A plastic or metal cap that snaps onto the top of the spout.

In the second step, the concrete of the enclosure structure is poured to form the enclosure structure 1;

The third step is to excavate the earthwork to the bottom elevation of the floor, dig out the drainage blind ditch 30 under the construction slab and the catchment ditch 31 at the side of the wall. drainage channel. Lay permeable material 32 in blind drainage ditch 30 under the board and catchment ditch 31 at the side of the wall;

The fourth step is to find the position of the horizontal drainage interface 21, open the nozzle protection, set the filter screen 22, and connect the horizontal drainage interface 21 with the water catchment ditch 31 beside the wall;

In the fifth step, the drainage blind ditch 30 under the slab and the water catchment ditch 31 at the side of the wall are covered with a waterproof layer 34 to form a complete submerged drainage system.

In the 6th step, close the former submerged dewatering well, after this the submerged groundwater enters the wall catchment ditch 31 through the drainage blind ditch under the plate, then enters the built-in drainage pipe 20 after being filtered by the filter screen 22, and the groundwater can be discharged to the ground by the pump.

The seventh step is to construct the floor structure until the underground structure is completed. When the drainage system needs to be used for the anti-floating of the underground structure in the permanent stage, a permanent pump is installed, and the start pump of the pump is set to control the water level. If the water level reaches or exceeds the water level, the pump will automatically start the precipitation. When the anti-floating of the underground structure does not need to use the drainage system in the permanent stage, the built-in drainage pipe can be injected with cement slurry to seal it.

Further construction methods are as follows:

In view of the fact that there are many types of enclosure structures, including underground diaphragm walls, cast-in-situ piles, occlusal piles, and prefabricated enclosure structures, etc. In order to better understand the content described in this patent, the detailed construction method of the cast-in-place underground diaphragm wall is introduced as an example.

(1) Manufacture the reinforcement cage of the underground diaphragm wall, install the reinforcement cage groove 10, the drainage pipe 20 simultaneously, and install the nozzle protection (filter screen 22) and the water stop 23. The horizontal frame of the reinforcement cage groove 10 is fixed in the reinforcement cage of the underground continuous wall by welding, and the drainage pipe 20 is fixed in the reinforcement cage groove 10 by binding. The reinforcement cage groove 10 can form a rigid protection for the drainage pipe 20, reduce the skew of the drainage pipe 20 caused by the hoisting construction of the reinforcement cage of the underground diaphragm wall, and at the same time alleviate the disturbance when the underground diaphragm wall is poured with concrete. At the position of the horizontal drainage interface 21 of the drainage pipe 20, the horizontal bars, vertical bars, and horizontal frame 11 of the reinforcement cage groove 10 of the underground diaphragm wall need to be disconnected, so that the drainage pipe 20 can extend horizontally to the water catchment ditch 31 at the edge of the wall. connected. Reinforcing reinforcement is carried out by reinforcing ribs 13 at all reinforcement truncation positions. The horizontal drainage interface 21 is provided with a water stop 23 to allow groundwater to enter the enclosure structure 1 along the outside of the pipe wall.

(2) Pouring concrete for the underground diaphragm wall. A crown beam is generally required on the top of the underground diaphragm wall, and the drainage pipe 20 should pass through the crown beam and extend above the crown beam. The top and the lower end of the drain pipe 20 are provided with spout protection (filter screen 22 ) to prevent foreign matter from entering the drain pipe 20 .

(3) Excavate the foundation pit until the bottom elevation of the base plate, and then continue to dig downwards to dig the drainage blind ditch 30 under the construction slab and the water catchment ditch 31 at the side of the wall, and connect the drain pipe 20. The planar arrangement of the blind drainage ditch 30 under the slab can adopt a "well"-shaped network arrangement, and can also adopt a circular or radial arrangement. The elevation of the drainage blind ditch 30 under the slab is slightly higher in the middle of the foundation pit, and slightly lower to the circumference, and the overall drainage gradient can be 0.2% to 0.5%. The depth of the wall side catchment ditch 31 is deeper than the drainage blind ditch 30 under the board, which is conducive to the water collection and catchment at the edge of the pit. Lay gravel or other types of water-permeable materials in the drainage blind ditch 30 under the slab and the water catchment ditch 31 at the side of the wall. The gravel ensures the stability of the trench, prevents the foundation soil on both sides of the trench from entering the trench and causes blockage, and also provides vertical support for the waterproof layer above.

(4) Find the horizontal drainage interface 21 on the underground continuous wall according to the reserved position, peel off the concrete protective layer there, and open the horizontal drainage interface 21 to install the filter screen 22, so that the horizontal drainage interface 21 and the wall catchment ditch 31 connected.

(5) The construction of the under-slab drainage blind ditch 30 and the wall catchment ditch 31 is covered with waterproof coiled material, and the waterproof coiled material extends to not less than 1m on both sides of the under-slab drainage blind ditch 30, and is turned up at the position of the underground diaphragm wall Not less than 1m.

(6) Close the former submerged dewatering well of the foundation pit, the submerged groundwater can enter the wall side catchment ditch 31 through the drainage blind ditch 30 under the plate, then enter the drainage pipe 21 after being filtered by the filter screen 22, and the submerged groundwater can be discharged to ground.

(7) Construction of the floor structure until the completion of the underground structure. When the drainage system needs to be used for the anti-floating of the underground structure in the permanent stage, a permanent pump is installed, and the start pump of the pump is set to control the water level. If the water level reaches or exceeds the water level, the pump will automatically start the precipitation. When the anti-floating of the underground structure does not need to use the drainage system in the permanent stage, the built-in drainage pipe can be injected with cement slurry to seal it.

The above; is only a preferred embodiment of the utility model; but the protection scope of the utility model is not limited thereto; any skilled person familiar with the technical field is within the technical scope disclosed in the utility model; according to the utility model Novel technical solutions and their improved concepts are equivalently replaced or changed; all should be covered within the protection scope of the present utility model.

Claims (9)

1. A submersible groundwater drainage system comprising:

the retaining structure is arranged on the outer side of the structural wall, is internally provided with a drain pipe and is used for retaining soil in foundation pit supporting engineering;

the structural bottom plate is arranged on the ground between the structural walls;

an under-board drainage blind ditch is arranged below the structural bottom plate, and a wall edge catchment ditch communicated with the under-board drainage blind ditch is arranged close to the structural wall;

the drain pipe is communicated with the wall water collecting ditch;

the drainage blind ditch under the plate forms drainage slopes with high middle and low periphery from the middle to the periphery so that underground water flows to the wall catchment ditch;

and the underplate drainage blind ditch and the wall edge water collecting ditch are filled with water permeable materials.

2. The submersible groundwater drainage system of claim 1, wherein the enclosure is one of a cast-in-place pile, a cast-in-place underground continuous wall, a snap-in pile, a precast pile, and a precast wall.

3. The submersible groundwater drainage system of claim 2, wherein a reinforcement cage groove is arranged in the enclosure structure, and the drain pipe is fixed in the reinforcement cage groove.

4. A submersible groundwater drainage system according to claim 3 wherein the reinforcement cage trough is defined by a transverse frame and a vertical rib.

5. The submersible sewage drain system of claim 1, wherein the underplate drain blind drain is a U-shaped channel.

6. A submersible groundwater drainage system according to claim 1 wherein the water permeable material is covered with a water barrier.

7. The submersible sewage drain system of claim 1, wherein the wall sink is covered with a waterproof layer.

8. The submersible sewage drain system of claim 1, wherein a screen is provided at a location where the drain pipe communicates with the wall catchment channel.

9. The submersible sewage drain system of claim 8, wherein a water stop is further provided at the junction of the drain pipe and the wall catchment.

Images