CN203569575U - Plastic blind ditch pipe sandless precipitation well - Google Patents

Plastic blind ditch pipe sandless precipitation well Download PDF

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Publication number
CN203569575U
CN203569575U CN201320579251.0U CN201320579251U CN203569575U CN 203569575 U CN203569575 U CN 203569575U CN 201320579251 U CN201320579251 U CN 201320579251U CN 203569575 U CN203569575 U CN 203569575U
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China
Prior art keywords
well
pipe
cone
plastic blind
ditch pipe
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CN201320579251.0U
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Chinese (zh)
Inventor
顾国荣
杨石飞
梁振宁
苏辉
许杰
陈晖�
王恺敏
郭星宇
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SHANGHAI CHANGKAI GEOTECHNICAL ENGINEERING Co Ltd
Shanghai Geotechnical Investigations and Design Institute Co Ltd
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SHANGHAI CHANGKAI GEOTECHNICAL ENGINEERING Co Ltd
Shanghai Geotechnical Investigations and Design Institute Co Ltd
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Abstract

The utility model relates to precipitation well structures, in particular to a plastic blind ditch pipe sandless precipitation well. The plastic blind ditch pipe sandless precipitation well is characterized in that the precipitation well is composed of a cone, a plastic blind ditch pipe above the cone and a precast concrete well mouth structure at the top end of the plastic blind ditch pipe, the cone point of the cone points downwards, at least two hooks are buried in the upper end face of the cone in advance, and the plastic blind ditch pipe is connected with the cone through the hooks. The plastic blind ditch pipe sandless precipitation well has the advantages that the pipe well is simple in structure, hole forming and well forming processes are simple, the pipe well is constructed into an unwatering well or a depressurization well according to rainfall needs, the water seepage area is increased, the water permeable effect is good, the precipitation well can replace a common precipitation pipe well, filter materials are saved, manufacturing cost is low, and popularization is convenient.

Description

Plastic blind-ditch pipe is without sand dewatering well
Technical field
The utility model relates to dewatering well structure, is specifically related to a kind of plastic blind-ditch pipe without sand dewatering well.
Background technology
For soft clay area, drawdown at 20m with the interior types such as dewatering well main rainfall pipe well.
Precipitation pipe well can utilize rush in creep into, circle round creep into, the multiple mode pore-forming that creeps into such as down-hole hammer creeps into, reverse circulation drilling, air drilling, and carry out punching and change slurry, sinking well casing, dilution mud, backfill filtrate, after the multiple working procedures such as sealing sealing of hole, well-flushing, form precipitation pipe well.Its advantage is that pipe well well spacing is large, and each well point is separate, and precipitation apparatus is comparatively simple, draws water effective, can substitute many group light well points.Shortcoming is that filtrate consumption is large, and complex process operation is many, and cost is higher.
Summary of the invention
The purpose of this utility model is according to above-mentioned the deficiencies in the prior art part, provide a kind of plastic blind-ditch pipe without sand dewatering well, this dewatering well is comprised of prefabricated steel concrete cone, plastic blind-ditch pipe, shut-in well plastic pipe and precast concrete shaft collar, to simplify well drilling technology, strengthen permeable effect.
The utility model object realizes and being completed by following technical scheme:
A kind of plastic blind-ditch pipe is without sand dewatering well, it is characterized in that described dewatering well is comprised of cone, the precast concrete shaft collar that is positioned at the plastic blind-ditch pipe of described cone top and is positioned at described plastic blind-ditch pipe top, the cone point of described cone points to below, its upper surface is embedded with at least two hooks, and described plastic blind-ditch pipe is connected with described cone by described hook.
The diameter of described cone upper surface is greater than the external diameter of described plastic blind-ditch pipe.
Described precast concrete shaft collar is for having certain thickness ring steel reinforced bar concrete slab, and the internal diameter of described armored concrete slab is greater than described plastic blind-ditch pipe external diameter, and the external diameter of described armored concrete slab is greater than the diameter of described cone upper surface.
Described precast concrete shaft collar below, between described plastic blind-ditch pipe and the borehole wall, be provided with the shut-in well plastic pipe of certain length, the internal diameter of described shut-in well plastic pipe is greater than described plastic blind-ditch pipe external diameter, and its external diameter is less than the diameter of described cone upper surface.
Described plastic blind-ditch pipe consists of framework and the geotextiles that is coated on described framework, and described framework is formed by some modified polypropene sleave hot melts overlap joints.
The upper surface central spot of described cone is embedded with a screw thread.
The utility model has the advantages that, pipe well structure is simple, and pore-forming and well drilling technology are simple, according to precipitation needs, pipe well is constructed into drainage well or pressure reduction well, increases infiltration area, permeable respond well, alternative general precipitation pipe well, saves filtrate, cost is low, and it is convenient to promote.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the utility model during as drainage well;
Fig. 2 is the overall structure schematic diagram of the utility model during as pressure reduction well;
Fig. 3 is the schematic diagram of cone in the utility model.
The specific embodiment
Below in conjunction with accompanying drawing, by embodiment, feature of the present utility model and other correlated characteristic are described in further detail, so that technician's of the same trade understanding:
As Fig. 1-3, in figure, mark 1-8 is respectively: cone 1, plastic blind-ditch pipe 2, pile follower bar 3, the borehole wall 4, precast concrete shaft collar 5, screw thread 6, hook 7, shut-in well plastic pipe 8.
Embodiment: as Figure 1-3, the present embodiment is specifically related to a kind of plastic blind-ditch pipe without sand dewatering well, this dewatering well is arranged at the construction place of higher or other water permeability soil layer of groundwater table, according to precipitation needs, can be used as drainage well or pressure reduction well and use, be mainly used in reducing this place's groundwater table to excavation pit and cheat at the end.When using as drainage well, dewatering well is comprised of cone 1, plastic blind-ditch pipe 2 and precast concrete shaft collar 5 these three parts; When using as pressure reduction well, dewatering well is comprised of cone 1, plastic blind-ditch pipe 2, precast concrete shaft collar 5 and shut-in well plastic pipe 8 these four parts; Wherein plastic blind-ditch pipe 2 is positioned at the top of cone 1 and interconnects, the outer unconfined aquifer section outside that is wrapped in plastic blind-ditch pipe 2 of shut-in well plastic pipe 8, and precast concrete shaft collar 5 is positioned at ground well head surrounding.
As Figure 1-3, cone 1 is positioned at the bottom of dewatering well, its cone point is placed down, and end face is embedded with at least two hooks 7 thereon, also can be along the plastic blind-ditch pipe 2 pre-buried circle of the setting position of end face thereon, hook 7 connects for same plastic blind-ditch pipe 2, and the central spot of end face is embedded with screw thread 6 thereon, and screw thread 6 connects for same work progress pile follower bar 3 used.Cone 1 is prefabricated, specifically can be comprised of steel concrete material or steel work, and both all have higher intensity, can play the effect of reaming and back cover, based on cost consideration, and more employing prefabricated reinforced concrete structure.
As Figure 1-3, plastic blind-ditch pipe 2 is positioned at the top of cone 1, by linking up with 7, is closely connected with cone 1, can make the end mouth of the complete sealed plastic blind-ditch pipe 2 in upper surface of cone 1.Plastic blind-ditch pipe 2 comprises a cylinder framework and is coated on the geotextiles on this framework, cylinder framework is that modified polypropene compressive strength is high by mutually overlapping and form after the sleave hot melt of modified polypropene, and resistance to pressure is good, play skeleton, and can resist outside soil pressure; The geotextiles of muddy water by outer cladding is filtered into clear water and enters in plastic blind-ditch pipe 2, emits, and has good permeable effect.The caliber of plastic blind-ditch pipe 2 is slightly less than the diameter of cone 1 upper surface, and its main purpose is to prevent in well process of press in, and the excessive compressing of the soil body on the borehole wall 4 causes plastic blind-ditch pipe 2 distortion excessive.
As shown in Figure 2, shut-in well structure when the outer unconfined aquifer section outside that is wrapped in plastic blind-ditch pipe 2 of shut-in well plastic pipe 8 is usingd as pressure reduction well, it is high-intensity PVC plastic pipe specifically, the internal diameter of this PVC plastic pipe is slightly larger than the external diameter of plastic blind-ditch pipe 2, and its external diameter is slightly less than the diameter of cone 1 upper surface.This shut-in well plastic pipe 8 determines whether to increase according to the type of dewatering well, when dewatering well is drainage well, can cancel shut-in well plastic pipe 8, when dewatering well is pressure reduction well, should increase shut-in well plastic pipe 8.
As shown in Figure 1, 2, precast concrete shaft collar 5 is positioned at place, ground well head surrounding, it specifically has certain thickness ring steel reinforced bar concrete slab, and the internal diameter of this armored concrete slab is slightly larger than the external diameter of plastic blind-ditch pipe 2, and its external diameter is greater than the diameter of cone 1 upper surface.At plastic blind-ditch pipe 2 or shut-in well, after plastic pipe 8 construct, add and be located at surface well mouth surrounding, prevent from that well head from caving in to crash into and in dewatering well, stop up well head with foreign object.
As Figure 1-3, the plastic blind-ditch pipe in the present embodiment is specially without the construction method of sand dewatering well:
1. plastic blind-ditch pipe 2 is set down by the cone point of cone 1 and be positioned over and build ground, place, in the upper surface of cone 1 and that both are fitted tightly is fixing by linking up with 7;
2. after, pile follower bar 3 is stretched to the bottom of plastic blind-ditch pipe 2, with the screw thread 6 of cone 1 upper surface, be threaded, on the ground of building place, form pipe well structure, the top of pile follower bar 3 is connected with pile follower;
3. start pile follower, by pile follower bar 3, utilize static pressure or mode of vibration to sink down in the soil body pipe well structure, in this process, the cone of cone 1 point plays the use of reaming, forms the borehole wall 4;
During 4. as drainage well, until tube coupling structure, sink down into after design elevation, reverse rotation pile follower bar 3, makes itself and cone 1 depart from rear recovery; During as pressure reduction well, when tube coupling structure submergence depth equals artesian aquifer thickness, follow-up tube coupling is outer wrapping up in after shut-in well plastic pipe 8 all, continues to sink down into design elevation, and reverse rotation pile follower bar 3 makes itself and cone 1 depart from rear recovery;
5. precast concrete shaft collar 5 is installed at well head place, ground.
It should be noted that, the dewatering well degree of depth in the present embodiment and diameter are not unique or limited, need to determine according to strata condition and precipitation compute depth, the specifications and models of the diameter of cone 1, plastic blind-ditch pipe 2, precast concrete shaft collar 5, shut-in well plastic pipe 8 are determined and are selected according to above-mentioned calculated case.
The beneficial effect of the present embodiment is: simplified well drilling technology, become well construction speed significantly to improve, permeable effect is very remarkable, save filtrate, reduced pipe well pore-forming and the difficulty that becomes well, according to precipitation needs, pipe well is constructed into drainage well or pressure reduction well, effectively reduces cost.

Claims (6)

1. a plastic blind-ditch pipe is without sand dewatering well, it is characterized in that described dewatering well is comprised of cone, the precast concrete shaft collar that is positioned at the plastic blind-ditch pipe of described cone top and is positioned at described plastic blind-ditch pipe top, the cone point of described cone points to below, its upper surface is embedded with at least two hooks, and described plastic blind-ditch pipe is connected with described cone by described hook.
2. a kind of plastic blind-ditch pipe according to claim 1, without sand dewatering well, is characterized in that the diameter of described cone upper surface is greater than the external diameter of described plastic blind-ditch pipe.
3. a kind of plastic blind-ditch pipe according to claim 1 is without sand dewatering well, it is characterized in that described precast concrete shaft collar is for having certain thickness ring steel reinforced bar concrete slab, the internal diameter of described armored concrete slab is greater than described plastic blind-ditch pipe external diameter, and the external diameter of described armored concrete slab is greater than the diameter of described cone upper surface.
4. a kind of plastic blind-ditch pipe according to claim 1 is without sand dewatering well, it is characterized in that described precast concrete shaft collar below, between described plastic blind-ditch pipe and the borehole wall, be provided with the shut-in well plastic pipe of certain length, the internal diameter of described shut-in well plastic pipe is greater than described plastic blind-ditch pipe external diameter, and its external diameter is less than the diameter of described cone upper surface.
5. a kind of plastic blind-ditch pipe according to claim 1 is without sand dewatering well, it is characterized in that described plastic blind-ditch pipe consists of framework and the geotextiles that is coated on described framework, and described framework is formed by some modified polypropene sleave hot melts overlap joints.
6. a kind of plastic blind-ditch pipe according to claim 1, without sand dewatering well, is characterized in that the upper surface central spot of described cone is embedded with a screw thread.
CN201320579251.0U 2013-09-18 2013-09-18 Plastic blind ditch pipe sandless precipitation well Active CN203569575U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320579251.0U CN203569575U (en) 2013-09-18 2013-09-18 Plastic blind ditch pipe sandless precipitation well

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320579251.0U CN203569575U (en) 2013-09-18 2013-09-18 Plastic blind ditch pipe sandless precipitation well

Publications (1)

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CN203569575U true CN203569575U (en) 2014-04-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507336A (en) * 2015-11-27 2016-04-20 上海长凯岩土工程有限公司 Method for forming composite foundation by using dewatering well
CN110258453A (en) * 2019-06-19 2019-09-20 长江水利委员会长江科学院 A kind of impacting Lightweight relief well pipe and application method speedily carried out rescue work for flood season piping
CN110984199A (en) * 2019-12-24 2020-04-10 福州鼓楼纹英建筑工程有限责任公司 Progressive direct-pressure water intake pipe well sealing structure and construction method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105507336A (en) * 2015-11-27 2016-04-20 上海长凯岩土工程有限公司 Method for forming composite foundation by using dewatering well
CN110258453A (en) * 2019-06-19 2019-09-20 长江水利委员会长江科学院 A kind of impacting Lightweight relief well pipe and application method speedily carried out rescue work for flood season piping
CN110984199A (en) * 2019-12-24 2020-04-10 福州鼓楼纹英建筑工程有限责任公司 Progressive direct-pressure water intake pipe well sealing structure and construction method thereof

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