Water and sand gushing treatment structure for foundation pit in complex geology

Abstract

The utility model discloses a water and sand gushing treatment structure for a foundation pit in complex geology, which comprises a bridge type water filter pipe, gravel filter material layers are filled in the middle, the bottom and the circumferential direction of the bridge type water filter pipe, the lowest part of each gravel filter material layer is located at the lower part of a water and sand gushing layer, and a circular bottom sealing plate is arranged at the bottom of the bridge type water filter pipe. A hollow screw rod is mounted on the circular bottom sealing plate, a plurality of dense honeycomb holes are formed in the circumferential direction of the hollow screw rod, the hollow screw rod extends out of the gravel filter material layer, the top of the hollow screw rod is connected with or separated from the water pump, a V-shaped groove is formed in the middle of the bridge type water filter pipe in the height direction, and a circular reinforcing mesh is mounted at the V-shaped groove; the height of the circular reinforcing mesh is equal to that of the gravel filter material layer, the hollow screw is used for drainage in the early stage and grouting in the later stage, and the technical problem that in the prior art, in the foundation pit excavation process and the next procedure construction process after excavation, water gushing and sand gushing are likely to occur, and the construction progress and the construction quality are affected is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of pollution discharge technology, especially relates to a complex geological foundation pit water and sand gushing treatment structure. BACKGROUND

[0002] The urban construction space is gradually reduced, and the development and application of underground space is more emphasized at present. In the coastal and groundwater resource rich areas, the groundwater level is higher, especially in the complex stratum, there is silt and other soil quality which is easy to be disturbed, in the process of foundation pit excavation and the construction process of the next process after excavation, the local foundation pit water and sand gushing often occurs, which affects the waterproof construction quality and efficiency and further affects the construction of the foundation. The waterproof operation with water is easy to cause poor construction quality, resulting in water leakage, and the water gushing is easy to affect the concrete mix ratio and pouring quality in the concrete pouring process, reduce the strength of the concrete, easily cause the bottom plate leakage, cause quality hidden danger, reduce the service life of the structure and reduce the foundation stability. CONTENT

[0003] The utility model discloses a complex geological foundation pit water and sand gushing treatment structure, and solves the technical problem that water and sand gushing easily occurs in the process of foundation pit excavation and the construction process of the next process after excavation in the prior art.

[0004] The utility model discloses a complex geological foundation pit water and sand gushing treatment structure, and solves the technical problem that water and sand gushing easily occurs in the process of foundation pit excavation and the construction process of the next process after excavation in the prior art.

[0005] A complex geological foundation pit water and sand gushing treatment structure, including bridge type filter water pipe, the middle part, bottom and circumferential filling of bridge type filter water pipe have the gravel filter material layer, the lowest part of gravel filter material layer is in water and sand gushing layer lower part, the bottom of bridge type filter water pipe has the round type sealing bottom plate, is installed with the hollow screw on the round type sealing bottom plate, the circumferential of hollow screw has a plurality of dense honeycomb hole, the hollow screw stretches out gravel filter material layer, the top of hollow screw is connected or separated with water pump, the middle part of bridge type filter water pipe height direction has V type groove, is installed with round type reinforcement mesh sheet at V type groove, the height of round type reinforcement mesh sheet is equivalent with the height of gravel filter material layer, and the hollow screw is used for early drainage and late grouting.

[0006] The utility model discloses a complex geological foundation pit water and sand gushing treatment structure, the bridge type filter water pipe and the hollow screw outside in the range of gravel filter material layer are all coated with filter cloth.

[0007] The utility model discloses a complex geological foundation pit water and sand gushing treatment structure, the middle part of bridge type filter water pipe height direction has U type groove, is installed with round type airtight cover plate at U type groove, round type airtight cover plate is located on the upper portion of round type reinforcement mesh sheet, and is set up with exhaust pipe at round type airtight cover plate.

[0008] The utility model discloses a complex geological foundation pit water and sand treatment structure, rubber water stop ring is arranged between the round type airtight cover plate and U type groove.

[0009] The utility model discloses a complex geological foundation pit water and sand treatment structure, the elastic sealing ring is pressed in the surface of round type airtight cover plate through the nut and realizes waterproof seal.

[0010] The utility model discloses a complex geological foundation pit water and sand treatment structure, the bridge type water filter pipe has a plurality of fixed clamps extending along the circumference in the part in the gravel filter layer.

[0011] The utility model discloses a complex geological foundation pit water and sand treatment structure, the gravel filter layer upper portion has the cushion layer, the cushion layer upper portion has the foundation waterproof layer, and the foundation waterproof layer upper portion has the waterproof protection layer.

[0012] The utility model discloses a complex geological foundation pit water and sand treatment structure, the waterproof protection layer upper portion has the foundation concrete, and the bridge type water filter pipe has a plurality of water stop wing rings extending along the circumference in the part in the foundation concrete.

[0013] The utility model discloses a complex geological foundation pit water and sand treatment structure, hollow screw rod and exhaust pipe all are provided with the detachable circular pipe plug.

[0014] The utility model discloses a complex geological foundation pit water and sand treatment structure, through the setting of the gravel filter of overbreak, can quickly construct the cushion concrete, reduces the disposal of this part exposure time and treading etc., can effectively guarantee the stability of foundation, through the setting of hollow screw rod, can realize the function of pumping in the drainage stage, also can realize the function of grouting in the later period, through the fixed and plugging of screw nut, plug and other mechanical type operation, realizes the electric welding operation of less humid area, reaches the effect of strengthening the safety of this part operation, through the external adjustable water pump, can guarantee the drainage effect, effectively blocks the quality influence of water and mud in the process of concrete and waterproof construction, avoids the hidden danger of existing structure leakage, through the adoption of circular steel wire mesh piece compression backfill filter material, can reduce the disturbance of gravel caused by water level and water pressure change, forms the fixed drainage channel, and the water quality is stable, through the setting of exhaust pipe, can remove the excess water and air in the grouting process, directly sees the slurry overflow of reasonable proportion, enhances the grouting quality, through the reinforcement of filter material gap after grouting, reaches the effect of reinforcing the foundation of this part, enhances the stability of foundation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be described further below in combination with the drawings and examples, and the drawings are as follows:

[0016] Fig. 1 is a schematic view of the embodiment of the present application;

[0017] Fig. 2 is a top view of the embodiment of the present application. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0019] As shown in Figs. 1-2 A kind of for complex geological foundation pit water and sand treatment structure, including bridge type filter pipe 1, the middle part, bottom and circumferential of bridge type filter pipe 1 are filled with broken stone filter material layer 16, the lowest part of broken stone filter material layer 16 is in water and sand layer lower part, bridge type filter pipe 1 bottom has circular bottom sealing plate 20, hollow screw 2 is installed on circular bottom sealing plate 20, hollow screw 2 circumferential has several dense honeycomb hole 14, hollow screw 2 extends broken stone filter material layer 16, hollow screw 2 top is connected or separated with water pump, bridge type filter pipe 1 height direction middle part has V-shaped groove 10, circular reinforcing mesh 11 is installed at V-shaped groove 10, the height of circular reinforcing mesh 11 is equivalent to the height of broken stone filter material layer 16, hollow screw 2 is used for early drainage and later grouting.

[0020] As a preferred embodiment, bridge type filter pipe 1 and hollow screw 2 outside in the range of broken stone filter material layer 16 are coated with filter cloth 13.

[0021] As a preferred embodiment, bridge type filter pipe 1 height direction middle part has U-shaped groove 8, circular airtight cover plate 6 is installed at U-shaped groove 8, circular airtight cover plate 6 is located on the upper part of circular reinforcing mesh 11, exhaust pipe 4 is provided through circular airtight cover plate 6.

[0022] As a preferred embodiment, rubber waterstop 7 is arranged between circular airtight cover plate 6 and U-shaped groove 8.

[0023] As a preferred embodiment, elastic sealing ring 15 is sleeved with hollow screw 2 position corresponding place of circular airtight cover plate 6, and elastic sealing ring 15 is compressed on the surface of circular airtight cover plate 6 to realize waterproof sealing by nut 3.

[0024] As a preferred embodiment, the bridge type water filtering pipe 1 is located in the gravel filter layer 16 and has a plurality of circumferentially extending fixed clamps 12.

[0025] As a preferred embodiment, the gravel filter layer 16 has a cushion layer 17 on the upper portion, the cushion layer 17 has a base waterproof layer 21 on the upper portion, and the base waterproof layer 21 has a waterproof protection layer 22 on the upper portion.

[0026] As a preferred embodiment, the waterproof protection layer 22 has a base concrete 18 on the upper portion, and the bridge type water filtering pipe 1 has a plurality of circumferentially extending water stop wing rings 9 in the portion inside the base concrete 18.

[0027] As a preferred embodiment, the hollow screw 2 and the exhaust pipe 4 are both provided with a detachable circular pipe plug 5.

[0028] Construction process

[0029] (1) The foundation pit is excavated to the design elevation, and the gravel filter layer 16 is backfilled at the water and sand gushing positions;

[0030] (2) During the backfilling of the gravel filter layer 16 to a certain depth, the bridge type water filtering pipe 1 with the bottom sealed and fixed by the upper and lower double nuts of the hollow screw 2 is placed in, the bridge type water filtering pipe 1 has an opening below the cushion layer 17, a single layer of filter cloth 13 is wound, the gravel filter layer 16 is backfilled, and the backfilling is performed to the design depth of the foundation pit excavation, and attention is paid to the fact that the space below the projection of the fixed clamp 12 is backfilled and compacted to prevent collapse and settlement;

[0031] (3) A double layer of filter cloth is wound at the position of the dense honeycomb holes 14 of the hollow screw 2, which can reduce the disturbance to the foundation caused by water gushing and taking away soil and fine sand. After the gravel filter layer inside the bridge type water filtering pipe 1 is backfilled to the position of the V-shaped groove 10, the circular steel mesh 11 is pressed into the V-shaped groove 10, the V-shaped groove 10 is arranged along the circumference of the bridge type water filtering pipe 1, the circular steel mesh 11 is fixed, and the filter material inside the bridge type water filtering pipe 1 is compacted to prevent disturbance caused by changes in water pressure and to avoid affecting the filtering effect;

[0032] (4) An inner thread is used to directly connect a water pump to the upper portion of the hollow screw 2, the hollow screw 2 has dense honeycomb holes 14 at the filter material position and is sealed at the bottom position, which can effectively avoid insufficient filtration and cause settlement. The water level inside the bridge type water filtering pipe 1 is observed, and the water pump flow is adjusted to stabilize the water level at the position to meet the cushion construction conditions;

[0033] (5) The cushion layer 17 is poured with foundation concrete. The cushion layer pouring construction organization needs to be strict, the exposure time of the foundation is reduced, and the concrete pouring flatness of the outer wall circumference of the bridge type water filtering pipe is strictly controlled;

[0034] (6) Construction of the waterproof layer 21 and the waterproof protection layer 22. After the bottom plate waterproof construction is completed and passed the acceptance, the waterproof protection layer 22 is quickly constructed to avoid the damage of the waterproof layer;

[0035] (7) Construction of the foundation concrete. After the completion of the foundation reinforcement, the foundation concrete 18 is poured. The concrete mix ratio, strength and other properties are strictly controlled during the pouring process. The device is prone to defects such as holes, poor compaction and other concrete quality defects at the water stop wing ring, which can cause water seepage at this part;

[0036] (8) Tightening of the round type sealing cover plate 6. After the foundation concrete reaches the strength and the device has the anti-floating condition, the round type sealing cover plate 6 is tightened. The round type sealing cover plate 6 achieves the water stop effect by tightening the nut 3 and the elastic sealing ring 15. The round type sealing cover plate 6 is pressed tightly with the rubber water stop ring 7 arranged in the U-shaped groove 8 to achieve the water stop effect.

[0037] (9) Grouting reinforcement of water and sand gushing parts. After the water and sand gushing are pumped out, the hollow screw rod is connected to the grouting equipment. The hollow screw rod is used as a grouting pipe. After the grout seeps out from the exhaust pipe, the round pipe plug is used to block the exhaust pipe. After the grout solidifies, the round pipe plug is used to block the hollow screw rod;

[0038] (10) Pouring of micro-expansive concrete 19 in the bridge type water filtering pipe 1. After the bridge type water filtering pipe 1 is washed clean, micro-expansive concrete 19 with a higher grade than the foundation concrete 18 is selected to pour into the cavity of the bridge type water filtering pipe 1. The pouring process is vibrated and compacted.

[0039] Process points:

[0040] (1) After excavation, the backfilling gravel filter layer should not have too high a mud content. The contained fine particles should be relatively dense and have large honeycomb holes to prevent pore blockage and filter loss.

[0041] (2) The height of the bridge type water filtering pipe should not be too high or too low. If it is too high, the micro-expansive concrete needs to be cut twice after pouring, otherwise it will affect the construction of the building ground. If it is too low, the lower filter material is insufficient, which can easily cause sand pumping during drainage and affect the stability of the foundation.

[0042] (3) After the nut is fixed on the round type sealing cover plate, water pumping should be stopped to observe whether there is leakage. If there is leakage, the round type sealing cover plate and the bridge type water filtering pipe can be fully welded, rust and corrosion prevention measures should be taken to reduce the risk of water leakage.

[0043] (4) After backfilling the filter material and pumping and draining water, the cushion concrete should be constructed as soon as possible to reduce the disturbance to the foundation and cause new water gushing points in the surrounding area.

[0044] In the description of the utility model, it is necessary to explain, the term "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "internal", "external" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the utility model, it is necessary to explain, unless otherwise expressly provided and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected, can be mechanical connection, can also be electrical connection, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances. In addition, in the description of the utility model, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0046] It should be understood that for ordinary skilled in the art, the above description can be improved or changed, and all these improvements and changes should belong to the protection scope of the claims attached to the utility model.

Claims

1. A structure for treating water and sand gushing from a complex geological foundation pit, characterized in that, The utility model provides a bridge type filter pipe (1) is filled with the gravel filter material layer (16) in the middle, bottom and circumference, the lowest part of gravel filter material layer (16) is under the gushing water, gushing sand layer, the bottom of bridge type filter pipe (1) has the round type sealing bottom plate (20), hollow screw rod (2) is installed on the round type sealing bottom plate (20), hollow screw rod (2) has a plurality of dense honeycomb hole (14) in the circumference, and hollow screw rod (2) extends out of gravel filter material layer (16), and the top of hollow screw rod (2) is connected or separated with water pump, and the middle part of bridge type filter pipe (1) has V type groove (10) in the height direction, and circular steel mesh (11) is installed at V type groove (10), and the height of circular steel mesh (11) is equivalent to the height of gravel filter material layer (16), and hollow screw rod (2) is used for early drainage and later grouting.

2. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 1, characterized in that, The bridge type filter pipe (1) and hollow screw rod (2) outside the range of gravel filter material layer (16) are covered with filter cloth (13).

3. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 2, characterized in that, The middle part of bridge type filter pipe (1) has U type groove (8) in the height direction, and circular airtight cover plate (6) is installed at U type groove (8), and circular airtight cover plate (6) is located on the upper part of circular steel mesh (11), and exhaust pipe (4) is arranged on the circular airtight cover plate (6).

4. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 3, characterized in that, Rubber waterstop ring (7) is arranged between circular airtight cover plate (6) and U type groove (8).

5. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 4, characterized in that, Elastic sealing ring (15) is sleeved on the position corresponding to circular airtight cover plate (6) and hollow screw rod (2), and elastic sealing ring (15) is pressed on the surface of circular airtight cover plate (6) to realize waterproof sealing.

6. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 5, characterized in that, Bridge type filter pipe (1) has a plurality of fixed clamping pieces (12) extending along the circumference in the middle part of gravel filter material layer (16).

7. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 6, characterized in that, Gravel filter material layer (16) has cushion layer (17) on the upper part, and foundation waterproof layer (21) is on the upper part of cushion layer (17), and waterproof protection layer (22) is on the upper part of foundation waterproof layer (21).

8. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 7, characterized in that, Foundation concrete (18) is on the upper part of waterproof protection layer (22), and bridge type filter pipe (1) has a plurality of water stop wing rings (9) extending along the circumference in the part inside foundation concrete (18).

9. The structure for treating water and sand gushing from a complex geological foundation pit according to claim 8, characterized in that, Detachable circular pipe plug (5) is arranged on hollow screw rod (2) and exhaust pipe (4).

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