CN203530996U - Multi-well-point combined type precipitation facility - Google Patents

Multi-well-point combined type precipitation facility Download PDF

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Publication number
CN203530996U
CN203530996U CN201320591728.7U CN201320591728U CN203530996U CN 203530996 U CN203530996 U CN 203530996U CN 201320591728 U CN201320591728 U CN 201320591728U CN 203530996 U CN203530996 U CN 203530996U
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well
point
pipe
many
permeable hole
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Inventor
金尧
谢立炳
祝仲龙
曹刚
牟振
戴泽良
周一勤
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WENZHOU TRANSPORTATION PLANNING AND DESIGN INSTITUTE
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Hangzhou xiaoshan road and bridge engineering department
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Abstract

The utility model discloses a multi-well-point combined type precipitation facility. The multi-well-point combined type precipitation facility is mainly used for reducing the underground water level of highways, bridges and culverts and other various projects. The multi-well-point combined type precipitation facility is composed of multiple well-point pipes and drainage devices, wherein each well-point pipe is composed of a large corrugated pipe and a small corrugated pipe, the drainage devices are matched with the large corrugated pipes and the small corrugated pipes in a one-to-one mode, and by the adoption of the multi-well-point combined type precipitation facility, it is guaranteed that the underground water level of a foundation ditch of a building project is lowered to a height meeting requirements, and safe excavation of the foundation ditch and efficient construction of the project are achieved. The multi-well-point combined type precipitation facility has the advantages of being low in cost, high in water pressure resistance, high in external pressure resistance and high in impact strength; due to the fact that the multi-well-point combination of the multiple large corrugated pipes and the multiple small corrugated pipes is adopted, the facility can be adapted to different construction environments and is high in adaptability, economical and practical; each well-point pipe can absorb and drain water independently, and whether all drainage devices or a part of the drainage devices are used can be determined according to the lowering condition of the underground water level, the using method is flexible, construction cost is saved, water drainage can be achieved without the need of mutual communication of the multiple well-point pipes through pipes, leakage of the pipes is effectively avoided, and water pumping efficiency is improved.

Description

Many well point combination precipitation facilities
Technical field
The utility model relates to a kind of precipitation facility for reducing highway, bridges and culverts and other all kinds of engineering groundwater table, especially many well point combination precipitation facilities.
Background technology
Civil works foundation construction is difficult point and the key of engineering construction.The River Network that groundwater table is high, on silty sand ground, the conventional method of excretion and dewatering mainly comprises: the one, and direct drainage, at the foundation ditch excavating, take steel sheet pile or other mode supportings around, by excavation of foundation pit and seepage flow underground water is out discharged to around foundation ditch, then use pumping for water pump.The soldier pile cost that this method adopts is higher, steel sheet pile or other support pattern sealings, seepage preventing effect are poor, add that the limited underground water that causes of the supporting degree of depth is serious around oozing, in excavation of foundation pit and main structure construction process, need to carry out a large amount of work of drawing water, be difficult to ensure that card foundation ditch carries out works construction under anhydrous execution conditions, and still have quicksand phenomenon to occur, have potential safety hazard.The 2nd, the well-points dewatering method of employing better effects if, it generally includes light well point, eductor well point, electro-osmosis well point, pipe well well point, deep-well well point etc." automatic control system of many well-points dewatering on a large scale " that in these methods, related structure and disclosed China Patent No. are 200920252005.8 is similar, mainly comprise well-point pipe, dewatering installation etc., and the well-point pipe disclosed in these patents adopts steel tube substantially, steel tube weight is heavier, involve great expense, need bury well-point pipe underground with main equipment, after completing, engineering need to adopt equally big machinery to pull up steel tube, operation inconvenience, consuming time expensive, and when practice of construction, steel tube is also difficult to reclaim use on whole withdrawings, causes larger waste; And " polyethylene small-caliber precipitation well point device " that disclosed China Patent No. is 201120082109.6 is although using low-cost plastic pipe as well-point pipe, but at underdrainage and under the pressure constantly promoting, this plastic pipe is often easily crushed, pipeline gas leakage drainage is difficult to avoid, and drainage efficiency is low.Meanwhile, the aperture of above-mentioned well-point pipe is comparatively single, almost adopts well-point pipe diameter and the spacing of unifying type, and after all interconnecting by pipeline on well-point pipe, unifies to carry out draining again, and this sealing for pipeline communication has also proposed requirements at the higher level.Particularly for the Foundation Design at common edge, river course, while being obviously greater than from river course the opposite side away from because of its seepage action of ground water amount of surveying near river course one, unify the well-point pipe diameter of type and the well point of pitch arrangement, can not adapt to the reality of engineering geology, also lack economic rationality.
Summary of the invention
Technical problem to be solved in the utility model be to overcome the defect of prior art and provide a kind of economical and practical, use the efficient many well points combination precipitation facilities of flexible, easy to operate, precipitation, it can ensure that civil works foundation ditch groundwater table is reduced to satisfactory height, makes foundation ditch safe excavation and efficient construction project.
Technical problem of the present utility model is achieved through the following technical solutions:
A kind of many well point combination precipitation facilities, this facility is mainly arranged in the silty sand ground at edge, river course, it comprises that many are embedded in well-point pipe in ground and the dewatering installation of supporting well-point pipe, every described well-point pipe bottom is all sealed, on every well-point pipe, be equipped with a plurality of permeable holes and be wrapped in the filtration gauze outside permeable hole, every described well-point pipe is bellows, is all provided with separately the dewatering installation matching in every described well-point pipe.
Many described bellowss are to consist of the large bellows of many arranged with intervals and the small corrugated pipe of Duo Gen arranged with interval, these the many adjacent edges, river course that are arranged on of large bellows.
The setting space of many described large bellowss is 6 ~ 8m, and the setting space of many small corrugated pipes is 1.5 ~ 2m.
The precipitation depth of described large bellows is 6 ~ 8m, and external diameter is 200 ~ 250mm, and pipe thickness is 1.4 ~ 1.7mm; The precipitation depth of small corrugated pipe is 6 ~ 8m, and external diameter is 63 ~ 75mm, and pipe thickness is 0.5 ~ 0.6mm.
The pipe shaft of described large bellows is provided with the large permeable hole that multilayer longitudinally arranges along large bellows, and every layer of large permeable hole is all made as 5 ~ 8 of circumference uniform distribution, and the longitudinal pitch of the large permeable hole of adjacent two layers is 15 ~ 20cm, and the aperture of each large permeable hole is 5 ~ 10mm; The pipe shaft of described small corrugated pipe is provided with the little permeable hole that multilayer longitudinally arranges along small corrugated pipe, and every layer little permeable hole is all made as 3 ~ 5 of circumference uniform distribution, and the longitudinal pitch of the little permeable hole of adjacent two layers is 12 ~ 15cm, and the aperture of each little permeable hole is 3 ~ 5mm.
Described dewatering installation comprises that the submersible pump being located in well-point pipe is connected submersible pump with one end, the other end stretches out the gutter that well-point pipe exposes; Or be located at the self priming pump outside well-point pipe, and on this self priming pump, connecting gutter, this gutter one end is stretched in well-point pipe.
Every described well-point pipe bottom is equipped with the pipe bottom plug that work seals.
Described filtration gauze is 100 ~ 150 object crocus cloths, and this filtration gauze is wrapped in outside permeable hole with 2 layers, and is provided with firmly steel wire of colligation.
On described ground, excavate the gutter having for described gutter draining.
Compared with prior art, the utility model mainly provides a kind of many well-points dewatering facility being formed by many large and small combined bellows, in every large bellows or small corrugated pipe, be all provided with separately the dewatering installation matching, it can ensure that civil works foundation ditch groundwater table is reduced to satisfactory height, and makes foundation ditch safe excavation and efficient construction project.This precipitation facility mainly has following benefit: the one, and bellows used can adopt PVC-U new material, the performances such as water pressure resistance intensity, proof to external pressure intensity, impact strength are all very good, material lightweight, easy to operate, and with low cost, after not needing large lifting equipment to bury underground to complete with engineering, recovery is not extracted; The 2nd, utilize many well points of many large and small bellowss to combine the practice of construction environment that can adapt to different engineerings, strong adaptability, precipitation performance complement, economical rationality; The 3rd, each well-point pipe all can independently absorb water, draining, can determine whether to open all or part of dewatering installation according to the decline situation of groundwater table on the one hand, mode of occupation is flexible, save operating expenses, without unified again after many well-point pipes are interconnected by pipeline, carry out draining on the other hand, effectively avoided pipeline leakage, improve the efficiency of drawing water.Precipitation facility after improvement also has the advantages such as economical and practical, easy to operate, precipitation is efficient.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model (schematic cross-section).
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structural representation of large bellows.
Fig. 4 is the structural representation of small corrugated pipe.
The specific embodiment
To the utility model embodiment, elaborate again by above-mentioned accompanying drawing below.
As shown in Figure 1 to 4,1. ground, 2. small corrugated pipe, 21. little permeable holes, 3. gutter, 4. self priming pump, 5. gutter, 6. foundation ditch, 7. engineering structures basis, 8. large bellows, 81. large permeable holes, 9. submersible pump, 10. filter gauze, 11. and manage bottom plugs.
Many well points combination precipitation facilities, as shown in Figure 1 and Figure 2, it mainly refers to the many well-points dewatering facility that adopts the bellows of different tube diameters to combine, and can be widely used in reducing the groundwater table of highway, bridges and culverts and other all kinds of engineerings.
This precipitation facility is arranged in the silty sand ground 1 at edge, river course conventionally, higher and the underground water of the groundwater table of this class ground has high osmosis, and engineering structures basis 7 needs to be embedded in ground 1, it is the important component part of engineering structures, the anhydrous construction of General Requirements, therefore foundation drainage is the critical process on engineering structures basis 7, when excavation pit 6 is built engineering structures, must the groundwater table in ground could be dropped to certain altitude by above-mentioned precipitation facility, thereby reach the object on anhydrous excavation pit 6, construction engineering structures basis 7.Conventionally, also need to excavate the gutter 3 of getting rid of for underground water on ground 1, this gutter can directly be communicated with river course.
Described precipitation facility comprises that many are embedded in well-point pipe in ground 1 and the dewatering installation of supporting well-point pipe; Described well-point pipe refers to large bellows 8, supporting well-point pipe refers to small corrugated pipe 2, to be made by PVC-U new material, and being generally the amorphous thermoplastic resin that VCM is made through polymerisation, PVC-U new material adds certain additive, as compositions such as stabilizing agent, sliding agent, fillers, there is the performances such as good water pressure resistance intensity, proof to external pressure intensity, impact strength, material lightweight, easy to operate, and with low cost.
Described burying underground is to wash away silty sand ground pore-forming by high-pressure hydraulic pump, embeddingly successively again enter, and engineering structures basis 7 and completed by engineering structures on basis that water level affects after, also adopt high-pressure hydraulic pump to wash away and coordinate artificial or other small-sized machines to pull up, in order to using next time, bellows 8 as large in some and small corrugated pipe 2 cannot be extracted, stay original place and in pipe, fill with sand filling, with low cost because of the bellows that adopts PVC-U material to make, and do not affect engineering and use and contaminated environment.
Many described large bellowss 8 are to be yi word pattern arranged with interval to be arranged on edge, river course, because the underground water water percolating capacity near edge, river course is large, by many large bellowss 8, can carry out faster draining, its setting space is 6 ~ 8m, the precipitation depth of every large bellows is 6 ~ 8m, external diameter is 200 ~ 250mm, and pipe thickness is 1.4 ~ 1.7mm; And the little ground of all the other underground water water percolating capacities away from can arrange the many small corrugated pipes 2 that are yi word pattern arranged with interval from river course, its setting space is 1.5 ~ 2m, and the precipitation depth of every small corrugated pipe is 6 ~ 8m, and external diameter is 63 ~ 75mm, and pipe thickness is 0.5 ~ 0.6mm.The object that many small corrugated pipes 2 are set is in addition because the water percolating capacity of underground water is generally difficult to calculate accurately, even by the definite water percolating capacity of test, also because variation or the impact of other factors of weather can not accurately be determined, therefore after the well-point pipe of many large bellowss 8 is set, the supplementary well-point pipe that many small corrugated pipes 2 are set is to carry out flexible use or standby, to guarantee that engineering construction safety is reliable, economical rationality again.
Described well point quantity and arrangement, mainly according to engineering site situation, design, it is calculated the gross leak amount of foundation ditch well-points dewatering by Related Formula, or according to the gross leak amount of the experience of correlation engineering and field test data estimation, as the economic technology comparative analysis of large bellows, small corrugated pipe well point, and determine both quantity and well point arrangement.
(1) for the engineering foundation being built on the silty sand ground of edge, river course (one-sided seepage discharge is larger), in the larger side of seepage discharge, large bellows well-point pipe is set, a side less at seepage discharge arranges small corrugated pipe;
(2) for narrower foundation pit, when result of calculation just can reach precipitation requirement as one-sided large bellows well point is set, General Requirements small corrugated pipe well point is as surplus capacity or standby, in order to avoid precipitation height does not reach the interim well point quantity that hastily increases while requiring, to accomplish to allow some leeway, flexible, guarantee that engineering construction safety is reliable, economical rationality.
In the well-point pipe that described large and small bellows forms, the bottom of every well-point pipe is all sealed with pipe bottom plug 11, and plays the effect of blocking sandy soil, mud and foreign material.The pipe shaft of every described well-point pipe is equipped with permeable hole, and the design of this permeable hole is also slightly different on large bellows 8 and small corrugated pipe 2; The pipe shaft of described large bellows 8 is provided with the large permeable hole 81 that multilayer as shown in Figure 3 longitudinally arranges along large bellows 8, every layer of large permeable hole, be on the cross section of large bellows 8, to be equipped with circumference uniform distribution to be 5 ~ 8 of plum blossom-shaped, the longitudinal pitch of the large permeable hole 81 of upper and lower adjacent two layers is 15 ~ 20cm, and the aperture of each large permeable hole 81 is 5 ~ 10mm; The pipe shaft of described small corrugated pipe 2 is provided with the little permeable hole 21 that multilayer as shown in Figure 4 longitudinally arranges along small corrugated pipe 2, every layer little permeable hole 21, be on the cross section of small corrugated pipe 2, to be equipped with circumference uniform distribution to be 3 ~ 5 of plum blossom-shaped, the longitudinal pitch of the little permeable hole 21 of upper and lower adjacent two layers is 12 ~ 15cm, and the aperture of each little permeable hole 21 is 3 ~ 5mm.
Described large bellows 8 and the pipe shaft of small corrugated pipe 2 are also provided with that two-layer to be wrapped in above-mentioned permeable hole outer and firmly filter gauze 10 with steel wire lashing, main 100 ~ 150 object crocus cloths that adopt of this filtration gauze 10 are made, and it can play the effect that prevents that permeable hole from stopping up.
Described dewatering installation is mainly divided into two kinds: a kind of is directly submersible pump 9 to be located in well-point pipe, is connected with gutter 5 on submersible pump 9, and this gutter stretches out well-point pipe and enters in the gutter 3 on ground 1, and this dewatering installation is mainly applicable to large bellows 8; Another kind is, at well-point pipe, self priming pump 4 is set outward, on self priming pump 4, be connected with the gutter 5 of two plastic flexible pipes, a gutter stretches in well-point pipe, and another root gutter enters in the gutter 3 on ground 1, and this dewatering installation is mainly applicable to small corrugated pipe 2.In every well-point pipe, be all that the dewatering installation matching is set separately, therefore can form independent water suction, drainage system, can determine whether to open all or part of dewatering installation according to the decline situation of groundwater table on the one hand, mode of occupation is flexible, save operating expenses, without unified again after many well-point pipes are interconnected by pipeline, carry out draining on the other hand, effectively avoided pipeline leakage, improve the efficiency of drawing water.
After groundwater table in described ground 1 is extracted, stable decline curve of lasting formation along with time of pumping, this underground water dropdown curve is mainly to be carried out timing or measured at any time groundwater table height by a plurality of large bellowss 8 and small corrugated pipe 2, thereby determine whether to open, continue to draw water or close dewatering installation, to guarantee smooth construction engineering structures basis or all-work structure, thereby reach the object of reducing expenses with construction safety.
Embodiment described in the utility model is only not used in restriction scope of the present utility model for the utility model is described.Should be understood that in addition, after having read content described in the utility model, those skilled in the art can make various changes or modifications the utility model, these equivalent form of values fall within the application's appended claims limited range equally.

Claims (9)

1. precipitation facility is combined in well point more than a kind, this facility is mainly built in the silty sand ground at edge, river course, it comprises that many are embedded in the interior well-point pipe of ground (1) and the dewatering installation of supporting well-point pipe, every described well-point pipe bottom is all sealed, on every well-point pipe, be equipped with a plurality of permeable holes and be wrapped in the filtration gauze (10) outside permeable hole, it is characterized in that every described well-point pipe is bellows, is all provided with separately the dewatering installation matching in every described well-point pipe.
2. precipitation facility is combined in many well points according to claim 1, it is characterized in that many described bellowss are to consist of the large bellows (8) of many arranged with intervals and the small corrugated pipe (2) of many arranged with intervals, the adjacent edge, river course that is arranged on of these many large bellowss (8).
3. many well point combination precipitation facilities according to claim 2, is characterized in that the setting space of described many large bellowss (8) is 6 ~ 8m, and the setting space of many small corrugated pipes (2) is 1.5 ~ 2m.
4. many well point combination precipitation facilities according to claim 2, is characterized in that the precipitation depth of described large bellows (8) is 6 ~ 8m, and external diameter is 200 ~ 250mm, and pipe thickness is 1.4 ~ 1.7mm; The precipitation depth of small corrugated pipe (2) is 6 ~ 8m, and external diameter is 63 ~ 75mm, and pipe thickness is 0.5 ~ 0.6mm.
5. precipitation facility is combined in many well points according to claim 2, the pipe shaft that it is characterized in that described large bellows (8) is provided with the large permeable hole (81) that multilayer longitudinally arranges along large bellows, every layer of large permeable hole is all made as 5 ~ 8 of circumference uniform distribution, the longitudinal pitch of the large permeable hole of adjacent two layers (81) is 15 ~ 20cm, and the aperture of each large permeable hole (81) is 5 ~ 10mm; The pipe shaft of described small corrugated pipe (2) is provided with the little permeable hole (21) that multilayer longitudinally arranges along small corrugated pipe, every layer little permeable hole is all made as 3 ~ 5 of circumference uniform distribution, the longitudinal pitch of the little permeable hole of adjacent two layers (21) is 12 ~ 15cm, and the aperture of each little permeable hole (21) is 3 ~ 5mm.
6. many well point combination precipitation facilities according to claim 1 and 2, is characterized in that described dewatering installation comprises that the submersible pump (9) being located in well-point pipe is connected submersible pump with one end, the other end stretches out the gutter (5) that well-point pipe exposes; Or be located at the self priming pump (4) outside well-point pipe, and on this self priming pump, connecting gutter (5), this gutter one end is stretched in well-point pipe.
7. many well point combination precipitation facilities according to claim 1 and 2, is characterized in that every described well-point pipe bottom is equipped with the pipe bottom plug (11) that work seals.
8. many well point combination precipitation facilities according to claim 1 and 2, is characterized in that described filtration gauze (10) is 100 ~ 150 object crocus cloths, and this filtration gauze is wrapped in outside permeable hole with 2 layers, and is provided with firmly steel wire of colligation.
9. many well point combination precipitation facilities according to claim 1 and 2, is characterized in that the upper gutter (3) having for described gutter (5) draining of excavating of described ground (1).
CN201320591728.7U 2013-09-25 2013-09-25 Multi-well-point combined type precipitation facility Active CN203530996U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104240578A (en) * 2014-06-19 2014-12-24 北京工业大学 Teaching model for simulating light well point precipitation construction
CN104775443A (en) * 2015-04-28 2015-07-15 金中天集团建设有限公司 Well point dewatering method and device
CN106088123A (en) * 2016-08-16 2016-11-09 中国建筑第七工程局有限公司 A kind of sand geology steel tube well fall water level device and construction method thereof
CN107178020A (en) * 2017-05-24 2017-09-19 浙江明通建设工程有限公司 A kind of road drainage construction method
CN110029680A (en) * 2019-04-19 2019-07-19 五矿二十三冶建设集团有限公司 A kind of deep foundation pit precipitation construction method
CN111456053A (en) * 2020-04-15 2020-07-28 江苏中路工程技术研究院有限公司 Construction method for dry operation of ditch and pond

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104240578A (en) * 2014-06-19 2014-12-24 北京工业大学 Teaching model for simulating light well point precipitation construction
CN104240578B (en) * 2014-06-19 2016-08-17 北京工业大学 A kind of simulation light-duty well-points dewatering construction teaching mode
CN104775443A (en) * 2015-04-28 2015-07-15 金中天集团建设有限公司 Well point dewatering method and device
CN106088123A (en) * 2016-08-16 2016-11-09 中国建筑第七工程局有限公司 A kind of sand geology steel tube well fall water level device and construction method thereof
CN106088123B (en) * 2016-08-16 2018-06-29 中国建筑第七工程局有限公司 A kind of sand geology steel tube well drop water level device and its construction method
CN107178020A (en) * 2017-05-24 2017-09-19 浙江明通建设工程有限公司 A kind of road drainage construction method
CN110029680A (en) * 2019-04-19 2019-07-19 五矿二十三冶建设集团有限公司 A kind of deep foundation pit precipitation construction method
CN111456053A (en) * 2020-04-15 2020-07-28 江苏中路工程技术研究院有限公司 Construction method for dry operation of ditch and pond

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