CN213014336U - A double-deck steel reinforcement cage filters sump pit for foundation ditch falls drainage - Google Patents
A double-deck steel reinforcement cage filters sump pit for foundation ditch falls drainage Download PDFInfo
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- CN213014336U CN213014336U CN202021320092.9U CN202021320092U CN213014336U CN 213014336 U CN213014336 U CN 213014336U CN 202021320092 U CN202021320092 U CN 202021320092U CN 213014336 U CN213014336 U CN 213014336U
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Abstract
The utility model relates to a hydraulic engineering construction field, concretely relates to double-deck steel reinforcement cage that is used for foundation ditch to fall drainage filters sump pit. The well body outer wall and pit excavation limit wall set up the backfill layer between and, well body inner wall department sets up outer steel reinforcement cage filter screen structure, outer steel reinforcement cage filter screen structure inboard sets up inlayer steel reinforcement cage filter screen structure, inlayer steel reinforcement cage filter screen structure is round platform form and its top diameter is greater than the bottom diameter, inlayer steel reinforcement cage filter screen structure and outer steel reinforcement cage filter screen structure are concentric, set up the filtration bed between inlayer steel reinforcement cage filter screen structure and the outer steel reinforcement cage filter screen structure, well sand material or coarse sand material are chooseed for use to the filtration bed, inlayer steel reinforcement cage filter screen structure bottom sets up shaft bottom steel reinforcement filter screen piece, well body bottom sets up shaft bottom filter material infiltration shop, shaft bottom infiltration filter material top surface shaft bottom steel reinforcement filter screen piece, well bottom infiltration filter material chooses for use well sand. This double-deck steel reinforcement cage filters sump pit has good drainage effect, goes out the water stability, guarantees to descend, drainage effect.
Description
Technical Field
The utility model relates to a hydraulic engineering construction field, concretely relates to double-deck steel reinforcement cage that is used for foundation ditch to fall drainage filters sump pit.
Background
When the bottom of the foundation pit of the soil texture and the silty sand texture is drained by adopting the water collecting well, the water collecting well has the functions of water filtering and water collection because the content of fine particles in the seeped water is more, the abrasion of a water pump is large, the water outlet effect is poor, the long-time drainage is also unfavorable for the stability of peripheral soil mass, the water collecting well with the filtering structure is mostly adopted,
at present, a filtering water collecting well for foundation pit drainage of soil and fine sand stratum mostly adopts a single-layer steel reinforcement cage filtering structure, namely a structure that a filtering net is wrapped outside a single-layer steel reinforcement cage and filtering materials are backfilled at the periphery of the single-layer steel reinforcement cage, the depth of the water collecting well is 2-6m, the diameter of the water collecting well is 1.5-3m, a back shovel is mostly adopted to excavate a well pit, due to the fact that the shape regularity of the back shovel excavated well pit is poor, the thickness of filtering materials backfilled between a pit wall and the single-layer steel reinforcement cage is uneven, the side wall of the well pit is poor in stability due to abrupt slope or vertical excavation and permeation, the filtering materials and the side wall soil layer of the well pit are mixed, and the problems that the water filtering effect of the single-layer steel reinforcement cage water collecting well is poor. The reason that the steep slope or vertical excavation is adopted for the sump pit is to control the backfill amount of the filtering materials, if the sump pit is excavated by adopting a slow stable slope, excessive filtering materials need to be backfilled, and particularly, the filtering materials with too thick upper parts are unnecessary, so that the economical efficiency is poor.
The utility model discloses a single-deck steel reinforcement cage who solves present soil property stratum, fine sand texture stratum foundation ditch filters the following not enough that the sump pit exists: the filter material is backfilled between the reinforcement cage filter screen and the excavated pit soil wall, the backfill filter material has uneven thickness due to poor shape regularity of the excavated pit side wall and poor soil stability of the pit side wall due to vertical or abrupt slope excavation and osmosis, and the filter material is easy to mix with the surrounding well wall soil layer, so that the thickness and quality of the filter material are difficult to control, thereby causing poor filtering effect, namely, the effluent is mixed with small particles in the soil layer or sand layer, the osmotic water is small, the water reducing and draining effects are poor, the continuous outward drainage through the filtering water collecting well is not beneficial to the stability of the surrounding soil body, and the problem of filter material waste also exists.
Disclosure of Invention
For solving the problem of prior art, the utility model provides a double-deck steel reinforcement cage filters sump pit for drainage falls in foundation ditch.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a double-layer reinforcement cage filtering water collecting well for foundation pit drainage comprises a well body and an inner-layer reinforcement cage filter screen structure, the filter material layer and the outer steel reinforcement cage filter screen structure, the backfill layer is arranged between the outer wall of the well body and the excavation side wall of the well pit, the outer steel reinforcement cage filter screen structure is arranged at the inner wall of the well body, the inner side of the outer steel reinforcement cage filter screen structure is provided with the inner steel reinforcement cage filter screen structure, the inner steel reinforcement cage filter screen structure is in a round platform shape, the upper diameter of the inner steel reinforcement cage filter screen structure is larger than the lower diameter of the outer steel reinforcement cage filter screen structure, the inner steel reinforcement cage filter screen structure and the outer steel reinforcement cage filter screen structure are concentric, the filter material layer is arranged between the inner steel reinforcement cage filter screen structure and the outer steel reinforcement cage filter screen structure, medium sand materials or coarse sand materials are selected for use as the filter material layer, the bottom of the well is provided with bottom penetrating filter materials, the top surface of.
The bottom hole steel bar filter screen comprises a bottom hole steel bar mesh and a geotechnical cloth layer, the bottom hole steel bar mesh is a circular mesh, the bottom hole steel bar mesh adopts steel bars with the diameter of 16mm, and the vertical and horizontal spacing of the bottom hole steel bar mesh is 200 mm; and a geotextile layer is fixed at the lower part of the bottom-hole reinforcing mesh.
The inner layer steel reinforcement cage filter screen structure comprises inner layer steel reinforcement cage vertical ribs, inner layer steel reinforcement mesh horizontal ring ribs, an inner layer steel reinforcement cage filter screen, upper radial positioning steel ribs and lower radial positioning steel ribs, wherein the inner layer steel reinforcement cage vertical ribs and the inner layer steel reinforcement mesh horizontal ring ribs form a round table-shaped steel reinforcement mesh in a welding and fixing mode, the upper part of the circular truncated cone-shaped reinforcing mesh is fixed with four upper radial positioning reinforcing steel bars, the upper radial positioning reinforcing steel bars are symmetrically welded and fixed on the upper part of the circular truncated cone-shaped reinforcing mesh, the upper radial positioning reinforcing steel bars adopt phi 20 reinforcing steel bars, the lower part of the round table-shaped reinforcing mesh is fixed with lower radial positioning reinforcing steel bars, the lower radial positioning reinforcing steel bars adopt phi 20 reinforcing steel bars, the lower radial positioning reinforcing steel bars are symmetrically welded and fixed on the lower part of the round table-shaped reinforcing mesh, and the outer surface of the round table-shaped reinforcing mesh is fixed with an inner layer reinforcing cage filter screen.
Outer steel reinforcement cage filter screen structure includes outer steel reinforcement cage founds the muscle, outer steel reinforcement net horizontal ring muscle, the filter screen of outer steel reinforcement cage, the positioning guide rail, outer steel reinforcement cage founds muscle and outer steel reinforcement net horizontal ring muscle adopts welded mode looks fixed connection, form cylinder type steel reinforcement cage between outer steel reinforcement cage founds muscle and the outer steel reinforcement net horizontal ring muscle, the positioning guide rail becomes the vertical welding of radial symmetry on the inner wall of this cylinder type steel reinforcement cage, the channel-section steel is chooseed for use to the positioning guide rail, the notch of positioning guide rail is inside, the quantity of positioning guide rail is four, the tip matching of upper portion radial orientation reinforcing bar and lower part radial orientation reinforcing bar is close to in the positioning guide rail inside wall, the filter screen of outer steel reinforcement cage is fixed on the cylinder type steel reinforcement cage periphery that founds muscle.
The bottom penetration filter material is medium sand material or coarse sand material.
Compared with the prior art, the beneficial effects of utility model are that: this double-deck steel reinforcement cage filters sump pit, have good drainage effect, go out water stably, guarantee to fall, drainage effect, because of the peripheral soil of the filtration sump pit that draws water and the fine particle in the sand bed that arouses runs off fewly, be favorable to the stability of peripheral soil body and foundation ditch slope, the wearing and tearing of water pump have also been reduced to the aquatic soil, sand particle content is few, equipment work efficiency has been improved, has also controlled the quantity of crossing the filter material simultaneously and has avoided causing the waste.
Drawings
Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.
Fig. 1 is a schematic top view of the present invention.
Fig. 2 is a schematic view of the structure a-a in fig. 1.
Figure 3 is the utility model discloses well inlayer steel reinforcement cage filter screen structure schematic diagram.
Fig. 4 is the structural schematic diagram of the outer steel reinforcement cage filter screen of the utility model.
Fig. 5 is a schematic diagram of the structure at B in fig. 1.
In the attached drawings, the name corresponding to the reference numeral is 1-inner layer reinforcement cage filter screen structure; 2-filtering the material; 3-outer layer reinforcement cage filter screen structure; 4-bottom hole reinforcing steel bar filter screen sheet; 5-bottom hole penetration filtering material; 6-backfilling raw soil or raw fine sand; 7-excavating side walls of the pit; 11-inner layer steel reinforcement cage vertical bars; 12-horizontal ring ribs of the reinforcing mesh on the inner layer; 13-inner steel reinforcement cage filter screen; 14-upper radial positioning of the reinforcing bars; 15-lower radial positioning of the reinforcing steel bars; 31-outer layer steel reinforcement cage vertical bars; 32-outer layer reinforcing mesh horizontal ring ribs; 33-a filter screen of an outer layer reinforcement cage; 34-positioning the guide rail; 4-bottom hole reinforcing steel bar filter screen sheet; 41-a downhole reinforcing mesh; 42-geotextile layer.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are provided only for illustrating the present invention and do not limit the scope of the present invention.
Please refer to fig. 1-5, which illustrates a double-layer steel reinforcement cage filtering water collecting well for drainage of a foundation pit, comprising a well body, an inner steel reinforcement cage filter screen structure 1, a filtering material layer 2 and an outer steel reinforcement cage filter screen structure 3, wherein a backfill layer 6 is arranged between the outer wall of the well body and the excavation side wall 7 of the pit, the backfill layer 6 is selected to backfill raw soil or raw fine sand, the inner wall of the well body is provided with the outer steel reinforcement cage filter screen structure 3, the inner side of the outer steel reinforcement cage filter screen structure 3 is provided with the inner steel reinforcement cage filter screen structure 1, the inner steel reinforcement cage filter screen structure 1 is round table-shaped, the upper diameter of the inner steel reinforcement cage filter screen structure is larger than the lower diameter, the inner steel reinforcement cage filter screen structure 1 and the outer steel reinforcement cage filter screen structure 3 are concentric, the filtering material layer 2 is arranged between the inner steel reinforcement cage filter screen structure 1 and the outer steel reinforcement cage filter screen structure 3, the filtering material layer 2 is selected to be medium, The thickness of the filter material at the bottom of the filter material layer 2 in the radial direction is 400-500 mm; a filtering material layer 2 with a certain thickness and filled between the inner steel reinforcement cage filter screen structure 1 and the outer steel reinforcement cage filter screen structure 3 plays a role of filtering and permeating water, so that underground water in a peripheral soil body permeates into the well, a bottom steel reinforcement filter screen piece 4 is arranged at the bottom of the inner steel reinforcement cage filter screen structure 1, the bottom steel reinforcement filter screen piece 4 is circular, and the diameter of the bottom steel reinforcement filter screen piece 4 is 40cm larger than the diameter of the bottom of the inner steel reinforcement cage filter screen structure 1; the bottom hole steel bar filter screen piece 4 comprises a bottom hole steel bar mesh 41 and a geotechnical cloth layer 42, wherein the bottom hole steel bar mesh 41 is a circular mesh piece, the bottom hole steel bar mesh 41 adopts steel bars with the diameter of 16mm, and the longitudinal and transverse spacing of the bottom hole steel bar mesh 41 is 200 mm; the lower part of the bottom hole reinforcing mesh 41 is fixed with a geotechnical cloth layer 42, and the geotechnical cloth layer 42 is 42-400g/m2 non-woven permeable geotechnical cloth. The bottom of the well body is provided with a well bottom penetration filter material 5, the top surface of the well bottom penetration filter material 5 is paved with a well bottom reinforcing steel bar screen sheet 4, the thickness of the well bottom penetration filter material 5 is 300mm, the well bottom penetration filter material 5 is selected from medium sand material or coarse sand material, the circular inner layer steel bar cage filter screen structure 1 and the outer layer steel bar cage filter screen structure 3 which are distributed in an inner layer and an outer layer play roles of fixing the middle filter material, ensuring the shape of the water collecting well and forming an intermediate water pumping space, simultaneously, the outer layer steel bar cage filter screen structure 3 also plays a role of controlling peripheral soil particles or sand particles to enter the filter material and also preventing the middle filter material from being mixed into the peripheral soil and the sand layer, the inner layer steel bar cage filter screen structure 1 plays a role of controlling the fine particles in the filter material and the loss of a small amount of soil and sand particles flowing into the filter material, and the water collecting and filtering well can be used in the water collecting well of a soil layer, a, And avoids excessive loss of fine soil and sand particles caused by pumping water, thereby being beneficial to keeping the soil body around the water collecting well stable.
Please refer to fig. 3, the inner layer steel reinforcement cage filter screen structure 1 includes an inner layer steel reinforcement cage vertical bar 11, an inner layer steel reinforcement mesh horizontal ring bar 12, an inner layer steel reinforcement cage filter screen 13, an upper radial positioning bar 14 and a lower radial positioning bar 15, the inner layer steel reinforcement cage vertical bar 11 and the inner layer steel reinforcement mesh horizontal ring bar 12 form a round platform-shaped steel reinforcement mesh by welding and fixing, the cone slope of the round platform-shaped steel reinforcement mesh is 20/1, the inner layer steel reinforcement cage vertical bar 11 is a steel bar with a phi of 20-25mm, and the distance between adjacent steel bars is 20-30 cm; the inner layer reinforcing mesh horizontal ring bar 12 adopts reinforcing bars with phi 18-22mm, and the distance between the adjacent reinforcing bars is 20-30 cm; the upper part of the round table-shaped reinforcing mesh is fixed with upper radial positioning reinforcing steel bars 14, the number of the upper radial positioning reinforcing steel bars 14 is four, the upper radial positioning reinforcing steel bars 14 are symmetrically welded and fixed on the upper part of the round table-shaped reinforcing mesh, the upper radial positioning reinforcing steel bars 14 adopt phi 20 reinforcing steel bars, the lower part of the round table-shaped reinforcing mesh is fixed with lower radial positioning reinforcing steel bars 15, the lower radial positioning reinforcing steel bars 15 adopt phi 20 reinforcing steel bars, the lower radial positioning reinforcing steel bars 15 are symmetrically welded and fixed on the lower part of the round table-shaped reinforcing mesh, the outer surface of the round table-shaped reinforcing mesh is fixed with an inner layer reinforcing cage filter screen 13, the periphery of the round table-shaped reinforcing mesh is fixedly connected with the inner layer reinforcing cage filter screen 13 by binding wires, so as to play good water filtering and collecting roles, the double layer reinforcing cage filtering water collecting wells of different stratum foundation pits adopt filtering materials with different thicknesses and inner, the water collecting well of the soil foundation pit adopts medium sand with fineness modulus of 2.3-2.8 as filtering material, the inner layer reinforcement cage filter screen 13 in the water collecting well of the soil foundation pit adopts a layer wrapped by a 100-mesh steel wire filter screen or a layer of 300g/m2 non-woven permeable geotextile, the water collecting well of the fine sand stratum foundation pit adopts coarse sand with fineness modulus of 3.2-3.7 as filtering material, and the inner layer reinforcement cage filter screen 13 in the water collecting well of the fine sand stratum foundation pit adopts 80-mesh steel wire filter screen; in order to be beneficial to the contact between the inner-layer steel bar filter screen structure 1 and the bottom steel bar filter screen piece 4, a geotextile hanging edge with the height of 10cm is connected to the bottom of the inner-layer steel bar filter screen structure 1 along the periphery.
As shown in fig. 4, the outer steel reinforcement cage filter screen structure 3 includes an outer steel reinforcement cage vertical rib 31, an outer steel reinforcement mesh horizontal ring rib 32, an outer steel reinforcement cage filter screen 33, and a positioning guide rail 34, the outer steel reinforcement cage vertical rib 31 and the outer steel reinforcement mesh horizontal ring rib 32 are fixedly connected by welding, a cylindrical steel reinforcement cage is formed between the outer steel reinforcement cage vertical rib 31 and the outer steel reinforcement mesh horizontal ring rib 32, the positioning guide rail 34 is radially symmetrically and vertically welded on the inner wall of the cylindrical steel reinforcement cage, the positioning guide rail 34 is made of channel steel, the notches of the positioning guide rail 34 are inward, the number of the positioning guide rails 34 is four, the ends of the upper radial positioning steel bars 14 and the lower radial positioning steel bars 15 are matched and close to the inner side wall of the positioning guide rail 34, the tips of the outer ends of the upper radial positioning steel bars 14 and the lower radial positioning steel bars 15 are processed into circular arcs for sliding, the upper radial positioning steel bars 14, the lower radial positioning steel bars 15 and the positioning guide rails 34 are designed according to an assembly clearance of 5mm, the outer-layer steel bar cage vertical bars 31 are steel bars with phi of 20-25mm, and the distance between the adjacent steel bars is 20-30 cm; the horizontal ring bar 32 of the outer layer reinforcing mesh adopts reinforcing bars with phi 18-22mm, and the distance between the adjacent reinforcing bars is 20-30 cm; the filter screen 33 of the outer layer reinforcement cage is fixed on the periphery of the cylindrical reinforcement cage consisting of the vertical ribs 31 and the annular ribs 32 through binding wires, the middle sand with the fineness modulus of 2.3-2.8 is adopted as a filter material for the water collecting well of the soil foundation pit, the filter screen 33 of the outer layer reinforcement cage in the water collecting well of the soil foundation pit adopts a 60-mesh steel wire filter screen, the coarse sand with the fineness modulus of 3.2-3.7 is adopted as a filter material for the water collecting well of the fine sand stratum foundation pit, and the filter screen 33 of the outer layer reinforcement cage in the water collecting well of the fine sand stratum foundation pit adopts a 40-mesh steel wire filter screen; the purpose of arranging the upper radial positioning steel bars 14, the lower radial positioning steel bars 15 and the positioning guide rails 34 is to maintain the relative position between the inner reinforcement cage net structure and the outer reinforcement cage net structure, namely to ensure the thickness dimension of the intermediate filtering material.
A double-layer reinforcement cage filtering water collecting well for foundation pit dewatering and drainage is designed according to factors such as foundation pit soil property conditions, water seepage conditions, construction requirements and the like, the well depth is 2-6m, and the well inner diameter is 1.5-3 m.
(1) Manufacturing an inner and outer layer reinforcement cage filter screen structure:
as shown in fig. 3: the inner layer steel reinforcement cage filter screen structure 1 is manufactured, for later dismantling, the inner layer steel reinforcement cage filter screen structure 1 adopts a round table shape with a large upper part and a small lower part, according to the design of the taper slope of 20/1, the inner layer steel reinforcement cage vertical ribs 11 and the inner layer steel reinforcement cage horizontal ring ribs 12 are connected together by a welding method to form a round table-shaped steel reinforcement net, the upper part 4 upper radial positioning steel ribs and the lower part 4 lower radial positioning steel ribs 15 are symmetrically welded on the inner layer steel reinforcement cage, the tips of the outer ends of the positioning ribs are processed into circular arc shapes to be beneficial to sliding up and down along the positioning guide rail grooves, the positioning ribs and the positioning guide rail 34 are designed according to the assembly clearance of 5mm, the inner layer steel reinforcement cage filter screen 13 is fixed on the periphery of the round table-shaped steel reinforcement cage composed of the inner layer steel reinforcement cage vertical ribs 11 and the inner layer steel reinforcement cage horizontal ring ribs 12 by binding wires, so as to be beneficial to the contact, and a geotextile hanging edge with the height of 10cm is connected to the bottom of the inner layer steel bar screen structure 1 along the periphery.
As shown in fig. 4: the outer layer steel reinforcement cage filter screen structure 3 is manufactured by connecting an outer layer steel reinforcement cage vertical rib 31 and an outer layer steel reinforcement net horizontal ring rib 32 together by adopting a welding method to form a cylindrical steel reinforcement cage, vertically welding 4 positioning guide rails 34 (5 channel steel) on the inner wall of the outer layer steel reinforcement cage in a radial symmetry mode, inwards welding a notch of the 5 channel steel, and fixing a filter screen 33 of the outer layer steel reinforcement cage on the periphery of the cylindrical steel reinforcement cage formed by the outer layer steel reinforcement cage vertical rib 31 and the outer layer steel reinforcement net horizontal ring rib 32 by using binding wires.
The purpose of setting up positioning steel bar and positioning guide 34 is in keeping the relative position between inside and outside steel reinforcement cage netowrk structure, guarantee the thickness size of middle filter material promptly.
(2) Excavating a water collecting well pit:
as shown in fig. 1 and 2, the excavation of the water collecting well pit adopts a back-hoe excavation, the excavation size of the bottom of the water collecting well pit is determined by the outline of the outer layer reinforcement cage filter screen structure 3, in order to keep the stability of the soil body of the side wall of the excavated well pit during the construction of the filtered water collecting well, a proper gradient can be reserved during the excavation of the water collecting well pit according to the soil quality and the underground water condition, and the excavation depth of the water collecting well pit is 0.3m below the designed cage bottom.
(3) Laying a bottom hole filter material and a bottom hole steel bar filter screen:
as shown in figure 2, a bottom hole penetration filter material 5 with the thickness of 30cm is paved, namely a medium sand material and a coarse sand material, and then a bottom hole reinforcing steel bar filter screen piece 4 is paved on the top surface of the bottom hole penetration filter material, so that the center position of the bottom hole penetration filter material corresponds to the center of the filtering water collecting well.
(4) The double-layer steel reinforcement cage water filtering well is structurally installed and filled with filter materials:
as shown in fig. 1 and 2:
adopting truck crane or back hoe to carry out the installation of outer steel reinforcement cage filter screen structure in the drainage well, installing outer steel reinforcement cage filter screen structure 3 earlier, making the center of outer steel reinforcement cage correspond the center of filtering the sump pit, then hoisting inlayer class steel reinforcement cage filter screen structure 1 for fix a position upper portion radial positioning reinforcing bar 14, lower part radial positioning reinforcing bar 15 to in the notch of location guide rail 34, then slowly transfer to take one's place, backfill filter 2.
And (3) putting backfill materials, selecting loose materials by adopting the original state soil materials dug out by well pits, avoiding containing large agglomerates and sludge, and putting backfill materials around in layers without compacting.
(5) And (3) operation of a filtering and water collecting well:
after the construction of the filtering water collecting well is finished, the water pump is suspended at the bottom of the water collecting well, and water is pumped after a water drainage pipe and a power supply system are connected.
The water collecting well is dismantled after operation is finished, the water pump is firstly dismantled, then the inner layer steel reinforcement cage filter screen structure is hung out, the inner layer steel reinforcement cage filter screen structure is designed into a round table shape with a large top and a small bottom, clamping effect between the inner layer steel reinforcement cage filter screen structure and the outer layer steel reinforcement cage filter screen structure and between the outer layer steel reinforcement cage filter screen structure and the filter material cannot be generated, the inner layer steel reinforcement cage filter screen structure and the outer layer steel reinforcement cage filter screen structure are easily hung out, and finally the water collecting pit is backfilled with.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (5)
1. A double-layer reinforcement cage filtering water collecting well for foundation pit drainage is characterized by comprising a well body, an inner reinforcement cage filter screen structure, a filter material layer and an outer reinforcement cage filter screen structure, wherein a backfill layer is arranged between the outer wall of the well body and a well pit excavation side wall, the inner wall of the well body is provided with the outer reinforcement cage filter screen structure, the inner side of the outer reinforcement cage filter screen structure is provided with the inner reinforcement cage filter screen structure, the inner reinforcement cage filter screen structure is in a round table shape, the upper diameter of the inner reinforcement cage filter screen structure is larger than the lower diameter of the inner reinforcement cage filter screen structure, the inner reinforcement cage filter screen structure and the outer reinforcement cage filter screen structure are concentric, the filter material layer is arranged between the inner reinforcement cage filter screen structure and the outer reinforcement cage filter screen structure, the filter material layer is made of medium sand or coarse sand, the bottom of the inner reinforcement cage filter screen structure is provided with a reinforcement cage filter screen sheet, the bottom penetrating filter material is medium sand or coarse sand.
2. The double-layer reinforcement cage filtering water collecting well for foundation pit drainage of claim 1, wherein the bottom hole reinforcement cage sheets comprise bottom hole reinforcement meshes and geotechnical cloth layers, the bottom hole reinforcement meshes are circular mesh sheets, the bottom hole reinforcement meshes are reinforcing steel bars with the diameter of 16mm, and the vertical and horizontal distances of the bottom hole reinforcement meshes are 200 mm; and a geotextile layer is fixed at the lower part of the bottom-hole reinforcing mesh.
3. The double-layer reinforcement cage filtering water collecting well for foundation pit drainage according to claim 1, wherein the inner-layer reinforcement cage filter screen structure comprises inner-layer reinforcement cage vertical bars, inner-layer reinforcement mesh horizontal ring bars, an inner-layer reinforcement cage filter screen, four upper radial positioning steel bars and four lower radial positioning steel bars, the inner-layer reinforcement cage vertical bars and the inner-layer reinforcement mesh horizontal ring bars are welded and fixed to form a circular truncated cone-shaped reinforcement mesh, the upper radial positioning steel bars are fixed to the upper portion of the circular truncated cone-shaped reinforcement mesh, the upper radial positioning steel bars are symmetrically welded and fixed to the upper portion of the circular truncated cone-shaped reinforcement mesh, the upper radial positioning steel bars are phi 20 steel bars, the lower radial positioning steel bars are fixed to the lower portion of the circular truncated cone-shaped reinforcement mesh, the lower radial positioning steel bars are phi 20 steel bars, and the lower radial positioning steel bars are symmetrically welded and fixed to the lower portion of the circular truncated cone-shaped reinforcement mesh, the filter screen is fixed on the outer surface of the round table-shaped reinforcing mesh.
4. The double-layer reinforcement cage filtering water collecting well for foundation pit dewatering and drainage according to claim 3, its characterized in that, outer steel reinforcement cage filter screen structure includes outer steel reinforcement cage grudging bar, outer steel reinforcement net horizontal ring muscle, the filter screen of outer steel reinforcement cage, the positioning guide rail, outer steel reinforcement cage grudging bar and outer steel reinforcement net horizontal ring muscle adopt welded mode looks fixed connection, form cylinder type steel reinforcement cage between outer steel reinforcement cage grudging bar and the outer steel reinforcement net horizontal ring muscle, the positioning guide rail becomes the vertical welding of radial symmetry on the inner wall of this cylinder type steel reinforcement cage, the channel-section steel is chooseed for use to the positioning guide rail, the notch of positioning guide rail is inwards, the quantity of positioning guide rail is four, the tip matching of upper portion radial orientation reinforcing bar and lower part radial orientation reinforcing bar is supported nearly in the positioning guide rail inside wall, the filter screen of outer steel reinforcement cage is fixed on the cylinder type steel reinforcement cage periphery that.
5. The double-layer reinforcement cage filtering water collecting well for foundation pit dewatering and drainage according to any one of claims 1 to 4, wherein the bottom penetration filter material is medium sand or coarse sand.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113550294A (en) * | 2021-07-26 | 2021-10-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | A steel reinforcement cage drainage and seepage pipe for reducing infiltration line in side slope body fast |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113550294A (en) * | 2021-07-26 | 2021-10-26 | 中钢集团马鞍山矿山研究总院股份有限公司 | A steel reinforcement cage drainage and seepage pipe for reducing infiltration line in side slope body fast |
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