CN217204187U

CN217204187U - Well point dewatering well structure in foundation pit

Info

Publication number: CN217204187U
Application number: CN202220849478.1U
Authority: CN
Inventors: 钟成帅; 蔡历颖; 程苏娟; 郑文棋
Original assignee: CSCEC Strait Construction and Development Co Ltd
Current assignee: CSCEC Strait Construction and Development Co Ltd
Priority date: 2022-04-13
Filing date: 2022-04-13
Publication date: 2022-08-16
Anticipated expiration: 2032-04-13

Abstract

The utility model relates to a well point precipitation well structure in foundation ditch belongs to construction technical field, including setting gradually the bed course in each foundation ditch body upper end, waterproof layer, protective layer and floor structure, still include the well point pipe that sets up with each foundation ditch body one-to-one and set up the precipitation well point at each foundation ditch body lower extreme, the precipitation well point includes tubular structure's walling crib, and the walling crib intussuseption is filled with the anti-current layer, and the walling crib pipe end runs through floor structure, protective layer, stretch into in the inside anti-current layer of walling crib behind waterproof layer and the bed course in proper order. The utility model discloses precipitation is effectual to can effectively prevent soil erosion and water loss, the prevention of seepage water is effectual.

Description

Well point dewatering well structure in foundation pit

Technical Field

The utility model relates to a well point precipitation well structure in foundation ditch belongs to construction technical field.

Background

Along with the development in city, the user demand in underground building space is bigger and bigger, so the area of basement and the degree of depth of basement are also bigger and bigger, but in big basement foundation ditch deeply, because the basement scope is big, the degree of depth is dark, traditional precipitation mode sets up the mode of precipitation well promptly at the foundation ditch periphery and is difficult to fall to design precipitation degree of depth with groundwater in the foundation ditch is whole, especially to the great position of the well excavation degree of depth in great foundation ditch middle part and the part hole in the foundation ditch, the precipitation of traditional foundation ditch is difficult to satisfy the construction requirement more, consequently the urgent need improves.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming among the above-mentioned prior art, the utility model discloses a well point precipitation well structure in foundation ditch, its precipitation is effectual to can prevent effectively that soil erosion and water loss, the prevention of seepage water is effectual.

In order to realize the purpose, the utility model adopts the following technical scheme:

the utility model provides a well point precipitation well structure in foundation ditch, is including setting gradually bed course, waterproof layer, protective layer and the bottom plate structure in each foundation ditch body upper end, still include with the well point pipe that each foundation ditch body one-to-one set up and set up the precipitation well point at each foundation ditch body lower extreme, the precipitation well point includes tubular structure's walling crib, the walling crib intussuseption is filled with and prevents the flow layer, the walling crib pipe end runs through in proper order and stretches into in the inside anti-flow layer of walling crib behind bottom plate structure, protective layer, waterproof layer and the bed course.

Furthermore, the anti-flow layer comprises a fine sand layer, a medium coarse sand layer, a fine stone layer, a gravel layer and a plain soil layer which are sequentially arranged from bottom to top, and geotechnical cloth is further arranged between the plain soil layer and the gravel layer.

Furthermore, the tail end of the well point pipe is communicated with a perforated floral pipe which is arranged in the gravel layer.

Furthermore, a valve and a water-stopping wing ring are also arranged on the well point pipe, and the water-stopping wing ring is arranged in the middle of the pipe body of the well point pipe penetrating through the bottom plate structure.

Further, the well point pipes are communicated with each other.

Compared with the prior art the utility model discloses there are following characteristics and beneficial effect:

the utility model discloses a set up precipitation well point in the foundation ditch body, set up the anti-flow layer in precipitation well point to cooperate well point pipe, can avoid causing the soil erosion and water loss of the bottom when the precipitation avoids when guaranteeing good pit internal precipitation effect, and can regard well point pipe as the pressure slip casting pipe to the high pressure injection cement thick liquid around the precipitation well point after the precipitation stops, consolidate because the stratum that the precipitation is disturbed below the basement bottom plate, improve foundation bearing capacity, guarantee structure safety; the middle part that the bottom plate structure was run through to well point pipe sets up stagnant water wing ring, avoids later stage well point outside of tubes portion infiltration, utilizes well point pipe to carry out the slip casting after precipitation stops simultaneously, guarantees base foundation bearing capacity promptly, has stopped the emergence of later stage seepage problem when solidifying peripheral foundation.

Drawings

Fig. 1 is the structural schematic diagram in the single foundation pit body of the utility model.

Wherein the reference numerals are: 1. a floor structure; 2. a protective layer; 3. a waterproof layer; 4. a cushion layer; 5. well point pipe; 6. a valve; 7. a water-stopping wing ring; 701. perforated floral tubes; 8. a gravel layer; 9. a crushed stone layer; 10. a fine stone layer; 11. a medium-coarse sand layer; 12. a fine sand layer; 13. a plain soil layer; 14. geotextile; 15. a well ring; 16. the foundation ditch body.

Detailed Description

The present invention will be described in more detail with reference to the following examples.

As shown in fig. 1, well point precipitation well structure in foundation ditch of this embodiment, including setting gradually bed course 4 in each foundation ditch body 16 upper end, waterproof layer 3, protective layer 2 and bottom plate structure 1, still include well point pipe 5 that sets up with each foundation ditch body 16 one-to-one and set up the precipitation well point at each foundation ditch body 16 lower extreme, the precipitation well point includes tubular structure's walling crib 15, walling 15 intussuseption is filled with the anti-current layer, the end of walling pipe 5 runs through bottom plate structure 1 in proper order, protective layer 2, stretch into in the inside anti-current layer of walling crib 15 behind waterproof layer 3 and the bed course 4.

Furtherly, the anti-current layer includes from the thin sand bed 12 that supreme setting gradually down, well coarse sand layer 11, thin stone layer 10, gravel layer 9, gravel layer 8 and plain soil layer 13, still is provided with geotechnological cloth 14 between plain soil layer 13 and the

gravel layer

8, 15 upper portions of walling crib are established geotechnological cloth 14 and are sealed with plain soil layer 13 clay, plain soil layer 13 is, this way can prevent effectively that the silt in the process basic stratum that the precipitation was drawn water is taken away by precipitation, effectively avoids soil erosion and water loss.

Further, the tail end of the well point pipe 5 is communicated with the perforated pipe 701, the perforated pipe 701 is arranged in the gravel layer 8, a plurality of grouting holes are formed in the side face of the perforated pipe 701, the well point pipe 5 can be used for grouting and reinforcing a flow-proof layer in a dewatering well point after dewatering is stopped, the foundation bearing capacity of the peripheral foundation stratum can be effectively reinforced, meanwhile, the grouting liquid can solidify the peripheral soil layer and the well point pipe 5, a watertight layer is formed in the dewatering well point, and the well point pipe 5 and the periphery are prevented from leaking.

Further, still be provided with valve 6 and stagnant water wing ring 7 on well point pipe 5, and stagnant water wing ring 7 sets up in the middle part that well point pipe 5 runs through the body of pipe of bottom plate structure 1, and the setting of stagnant water wing ring 7 prevents that well point pipe 5 from being located bottom plate structure 1 position and taking place the infiltration phenomenon.

Further, each well point pipe 5 communicates the setting each other, can communicate a water pump or slip casting device simultaneously behind each well point pipe 5 intercommunication and draw water or the slip casting to accurate control can be realized to cooperation valve 6, and nimble control is consolidated the precipitation or the slip casting of each foundation ditch body 16.

The utility model discloses a theory of operation: by arranging the dewatering well point in the foundation pit body 16, arranging the anti-flow layer in the dewatering well point and matching with the well point pipe 5, the well-point pipe 5 can be used as a pressure grouting pipe to inject cement slurry to the periphery of the dewatering well point at high pressure when the dewatering is stopped while ensuring a good dewatering effect in the pit, so that the disturbed stratum of the dewatering below the bottom plate of the basement is reinforced, the bearing capacity of the foundation is improved, and the structure safety is ensured; well point pipe 5 runs through bottom plate structure 1's middle part and sets up stagnant water wing ring 7, avoids 5 outside infiltration of later stage well point pipe, utilizes well point pipe 5 to carry out the slip casting after precipitation stops simultaneously, guarantees base basis bearing capacity promptly, stops the emergence of later stage seepage problem in the solidification of peripheral foundation basis.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The utility model provides a well point precipitation well structure in foundation ditch which characterized in that: including setting gradually bed course (4) in each foundation ditch body (16) upper end, waterproof layer (3), protective layer (2) and floor structure (1), still include well point pipe (5) that set up with each foundation ditch body (16) one-to-one and set up the precipitation well point at each foundation ditch body (16) lower extreme, precipitation well point includes tubular structure's walling crib (15), walling crib (15) intussuseption is filled with prevents the flowing layer, bottom structure (1) is run through in proper order to well point pipe (5) end, protective layer (2), stretch into in the prevent flowing layer of walling crib (15) inside behind waterproof layer (3) and bed course (4).

2. The well point dewatering well structure in the foundation pit as claimed in claim 1, wherein: the anti-flow layer comprises a fine sand layer (12), a medium-coarse sand layer (11), a fine stone layer (10), a gravel layer (9), a gravel layer (8) and a plain soil layer (13) which are sequentially arranged from bottom to top, and geotextile (14) is further arranged between the plain soil layer (13) and the gravel layer (8).

3. The well point dewatering well structure in the foundation pit as claimed in claim 2, wherein: the tail end of the well point pipe (5) is communicated with a perforated floral pipe (701), and the perforated floral pipe (701) is arranged in the gravel layer (8).

4. The well point dewatering well structure in the foundation pit as claimed in claim 3, wherein: the well point pipe (5) is also provided with a valve (6) and a water stop wing ring (7), and the water stop wing ring (7) is arranged in the middle of the pipe body of the well point pipe (5) penetrating through the bottom plate structure (1).

5. The well point dewatering well structure in the foundation pit as claimed in claim 1, wherein: the well point pipes (5) are communicated with each other.