CN202440826U - Waterproof system for high-water level basement foundation slabs - Google Patents
Waterproof system for high-water level basement foundation slabs Download PDFInfo
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- CN202440826U CN202440826U CN2012200945746U CN201220094574U CN202440826U CN 202440826 U CN202440826 U CN 202440826U CN 2012200945746 U CN2012200945746 U CN 2012200945746U CN 201220094574 U CN201220094574 U CN 201220094574U CN 202440826 U CN202440826 U CN 202440826U
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- hydrophobic ditch
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Abstract
The utility model discloses a waterproof system for high-water level basement foundation slabs. The waterproof system comprises platforms on piles, drainage ditches, gutterways, a dewatering well and a submersible pump, wherein more than one drainage ditch built by loose bricks and fiber webs is formed below the spacing position between the platforms on piles; the distance from the bottom of the platforms on piles to the top of the drainage ditches is 500 to 1,000mm; the gutterways are formed on the ground supported by a foundation pit and at the periphery of the bottom of the foundation pit; the dewatering well is arranged outside the outermost peripheral edge of the basement foundation; a water outlet end of the drainage ditches is communicated with a corresponding dewatering well; and the submersible pump is arranged in the dewatering well and is communicated with the gutterways through a pumping pipe. The problems of low dryness of a flexible waterproof working face, high cost of jet grouting piles, severe water leakage, waste of labor and materials and the like in the prior art are solved, and the waterproof system has the characteristics of effectively dewatering, shortening the construction period, saving the cost, being simple in structure and low in construction cost, facilitating construction quality control, and the like.
Description
Technical field
The utility model relates to the basement bottom board waterproof construction technology field of civil engineering, is a kind of high water level basement bottom board waterproofing system specifically.
Background technology
Along with the raising of architectural design underground construction level, the function of use of basement will not only be used for purposes such as underground air defense, underground garage.Since the in short supply and fashion trend of following the past underground expansion space of international building thing of urban architecture land used, the past underground dark expansion of building usage space (layer), underground office, the underground commerce shopping square becomes more diverse.The building basement multiple stratification in present China the Changjiang river, the low-lying area of geology, Delta of the Pearl River alluvium, function of use variation are outstanding day by day.Underground function instructions for use is high more, and the basement waterproofing class requirement is just high more; Groundwater table high hydraulic pressure more is big more, and difficulty of construction is also just big more.
The outer anti-outer subsides method of the general employing of the basement bottom board waterproofing course of high-grade waterproof.Its waterproof construction is flexible waterproof layer → topping → coiled material (doing the shop) adhered layer → topping → deck by upstream face to deck successively; And the first floor flexible waterproof layer of forefront is synthetic high polymer waterproof coating or polyurethane coating film, and the aridity that its cement mortar is criticized retaining basic unit requires very high, and basic unit's aridity is high more, and quality is just good more.
Be in the foundation ditch of high groundwater level; Particularly the closer to rivers, lake, the regional saturated silt soil strata in seashore; The drying that water-stop curtain can not guarantee substrate soil fully is set; Because huge water pressure can make the working cushion layer (concrete bed course) of basement bottom board and the stock mould water permeability of pile cap structure strengthen, cause the substrate infiltration.Therefore, its basal plane just is difficult to reach the aridity of flexible waterproof layer synthetic high polymer waterproof coating or polyurethane coating film construction requirement, and construction quality is difficult to guarantee.
The problem that seeps water to substrate in the engineering; The most directly method adopts well-points dewatering exactly, promptly around foundation ditch or set inside precipitation well point, is reduced to groundwater table below the working face; But for the peripheral geological environment comparatively responsive to underground water, this method is also inapplicable.Can adopt rotary churning pile water stopping in addition, promptly do rotary churning pile, form the sealing layer one in bases in the position of infiltration.This way can effectively solve the problem of substrate infiltration, guarantees the aridity of substrate, but the shortcoming of this method is that cost is higher; And to spend great amount of time; Moreover for the foundation ditch that is in phreatic high, the infiltration situation is even more serious, and the shortcoming of this method highlights more.Can also under concrete cushion, set up 100～200mm sandy gravel bed course.The foundation ditch that area is big also should be provided with in sand-gravel cushion in length and breadth to french drain, is beneficial to water discharged to the both sides gutter take away.This method can guarantee the substrate infiltration is drained rapidly, but under the bigger situation of foundation ditch area, this way expense of relatively taking a lot of work is expected.
The utility model content
The purpose of the utility model is to overcome the deficiency that above prior art exists, and a kind of simple in structure, inexpensive, effective precipitation, reduction duration is provided, practices thrift cost and has been convenient to the high water level basement bottom board waterproofing system of quality control on construction.
In order to achieve the above object, the utility model adopts following technical scheme: a kind of high water level waterproof construction method for bottom plate of basement comprises the following steps:
(1) at first utilize the water-stop curtain of pattern foundation pit supporting structure, the water of foundation depth scope soil layer ended at a distance from beyond the foundation ditch periphery, simultaneously on the ground of pattern foundation pit supporting structure and the foundation ditch bottom perimeter all be provided with and connect the gutter;
(2) the hydrophobic ditch that is built at the loose brick of usefulness and the fleece that are provided with below the interval location between the basement bottom board pile cap more than 1, the pile cap bottom is apart from hydrophobic ditch top 500～1000mm;
(3) by hydrophobic ditch water outlet end corresponding precipitation well is set at the foundation ditch periphery, the precipitation well is located at the outside apart from basement basis outermost peripheral, in the precipitation well submersible pump is set, and submersible pump is communicated with the gutter through drinking-water pipe.
As a kind of preferred scheme; The excavation method of the precipitation well in hydrophobic ditch in the said step (2) and the step (3) is: when pit earthwork digs to the absolute altitude of half height of pile cap; Layout plan according to hydrophobic ditch and precipitation well is measured unwrapping wire, carries out the soil excavation of hydrophobic ditch and the soil excavation of precipitation well simultaneously after accomplishing.
In order to avoid basement bottom board structure and waterproofing course position, the precipitation well in the said step (3) is located at apart from beyond the outermost peripheral 600mm of basement basis.
As a kind of preferred scheme; Hydrophobic ditch job practices in the said step (2) is: the layer thickness that tiles in the bottom of hydrophobic ditch earlier is the loose brick of 60～120mm; The equal laying depth in hydrophobic ditch both sides is the loose brick of 120～240mm, and the interior empty width of hydrophobic ditch is 120～160mm, and the interior empty pine of hydrophobic ditch is filled out the rubble that particle diameter is 20～30mm; The top tiling thickness of hydrophobic ditch is that 60～120mm length is the loose brick of 240mm; Stay the wide sluicing seam of 30～60mm between the loose brick at top and the loose brick, lay 2～3 layers of fleece at the top of hydrophobic ditch pine brick upper surface and both sides pine brick external surface then, fleece is every square centimeter 9～16 order; The bottom and the precipitation well of hydrophobic ditch have 0.5～1% the gradient simultaneously, and the interior water of ditch is walked toward the precipitation well array smoothly.
As a kind of preferred scheme, the hydrophobic ditch layout in the said step (2) is elongated communicating structure or non-elongated communicating structure.Only needing the hydrophobic ditch water outlet end of assurance to be communicated with the precipitation well gets final product.
As the preferred scheme of another kind, the hydrophobic ditch layout in the said step (2) is for curving structure, and hydrophobic ditch water outlet end is communicated with precipitation well in the step (3).
A kind of high water level basement bottom board waterproofing system comprises pile cap, hydrophobic ditch, gutter, precipitation well and submersible pump; Wherein, Interval location between pile cap below is provided with the hydrophobic ditch that the loose brick of usefulness and fleece more than 1 are built into, and the pile cap bottom is apart from hydrophobic ditch top 500～1000mm, and the ground of pattern foundation pit supporting structure and foundation ditch bottom perimeter all are provided with and connect the gutter; The outer setting precipitation well of basement basis outermost peripheral; Hydrophobic ditch water outlet end is communicated with corresponding precipitation well, in the precipitation well submersible pump is set, and submersible pump is communicated with the gutter through drinking-water pipe.
As a kind of preferred scheme; Said hydrophobic ditch is the loose brick that 1 layer of 60～120mm laid in the bottom, and the equal laying depth in both sides is the loose brick of 120～240mm, and empty width is 120～160mm in it; The interior empty pine of hydrophobic ditch is filled out the rubble that particle diameter is 20～30mm; The top tiling thickness of hydrophobic ditch is that 60～120mm length is the loose brick of 240mm, stays the wide sluicing seam of 30～60mm between the loose brick at top and the loose brick, and the top pine brick upper surface of hydrophobic ditch and both sides pine brick external surface are laid 2～3 layers of fleece; Fleece is every square centimeter 9～16 order, and the bottom and the precipitation well of hydrophobic ditch have 0.5～1% the gradient simultaneously.
For the pressure that can support soil and can good draining, said precipitation well comprises reinforcing cage, stiffening ring, stirrup and water strainer; Wherein, The stirrup spiral is fixed on the reinforcing cage; Stiffening ring is sheathed to be fixed on the reinforcing cage; Reinforcing cage is outside to coat more than 3 layers every square centimeter and has 9～12 purpose water strainers, and the length of reinforcing cage is smaller or equal to 4.5m and less than the embedded depth of the foundation pit supporting pile of pattern foundation pit supporting structure, said precipitation well is located at apart from beyond the outermost peripheral 600mm of basement basis.The main function of precipitation well be catchment, precipitation and pump drainage water, the size of precipitation well is according to the displacement design of hydrophobic ditch.
For can better draining, filter and do not stop up; Also comprise travel switch; Travel switch is arranged on the precipitation well inwall of submersible pump top, and said diving pump lift is more than the 30m, more than the diameter 50mm; Said drinking-water pipe is the hard PVC pipe, and its hard PVC pipe is connected with 300～500mm Great Wall Software pipe with the vibration damping of the delivery port junction of submersible pump.
The utility model has following advantage and effect with respect to prior art:
1, adopt the utility model high water level basement bottom board waterproofing system, can effective precipitation, for next process provides the scope of operation, avoided in the past can't getting into the situation of one procedure because of precipitation failure or ponding, can reduce the duration greatly.
2, structures such as hydrophobic ditch in the utility model and precipitation well, simple with material, cheap and can effectively guarantee the aridity of basement bottom board waterproof matrix, saved in the past the expense that causes construction of waterproof layer to do over again and produce because of precipitation failure or ponding.
3, adopt the utility model high water level basement bottom board waterproofing system, guaranteed the aridity of basement bottom board basic unit and the quality of construction of waterproof layer, guaranteed that waterproofing course inspection and the qualification rate of checking and accepting reach more than 100%, the Functionality, quality and appealing design yield reaches more than 90%.
4, fleece in the utility model and water strainer all can adopt old safety net, and cost is practiced thrift in twice laid.
5, the bottom of the hydrophobic ditch in the utility model and precipitation well have 0.5～1% the gradient, have to make water more be prone to the characteristics that flow to the gutter.
6, the precipitation well in the utility model comprises reinforcing cage, stiffening ring, stirrup and water strainer; And the length of reinforcing cage is smaller or equal to 4.5m and less than the embedded depth of the foundation pit supporting pile of pattern foundation pit supporting structure, and having can the effective support ground pressure and be convenient to excavator branch two-stage platform and dig pit and bury underground.
7, the drinking-water pipe in the utility model is avoided drinking-water pipe because silt stops up for the hard PVC pipe, and the hard PVC pipe is connected with 300～500mm Great Wall Software pipe with the vibration damping of the delivery port junction of submersible pump.
Description of drawings
Fig. 1 is the structural representation of the utility model high water level basement bottom board waterproofing system;
Fig. 2 is the sectional view of the utility model high water level basement bottom board waterproofing system;
Fig. 3 is the layout plan of the hydrophobic ditch of the utility model high water level basement bottom board waterproofing system;
Fig. 4 is the sectional view of the hydrophobic ditch of the utility model high water level basement bottom board waterproofing system;
Fig. 5 is the structural representation of the utility model high water level basement bottom board waterproofing system precipitation well.
Label and title are following among the figure:
| 1 | The |
2 | The |
| 3 | |
4 | The precipitation well |
| 5 | Basement basis outermost peripheral | 6 | |
| 7 | Drinking- |
8 | Reinforcing |
| 9 | |
10 | Stirrup |
| 11 | |
12 | The loose brick in |
| 13 | Hydrophobic ditch both |
14 | Hydrophobic ditch |
| 15 | |
16 | |
| 17 | The ground of pattern foundation |
18 | |
| 19 | Rubble |
The specific embodiment
For ease of it will be appreciated by those skilled in the art that the utility model is done further to specify below in conjunction with accompanying drawing and embodiment.
Embodiment 1:
Shown in Fig. 1～5, a kind of high water level waterproof construction method for bottom plate of basement comprises the following steps:
(1) at first utilize the water-stop curtain of pattern foundation pit supporting structure, the water of foundation ditch 18 depth bounds soil layers ended at a distance from beyond foundation ditch 17 peripheries, simultaneously on the ground 17 of pattern foundation pit supporting structure and the foundation ditch bottom perimeter all be provided with and connect gutter 1;
(2) the hydrophobic ditch 3 that is built at the loose brick of usefulness and the fleece that are provided with below the interval location between the basement bottom board pile cap more than 1, pile cap bottom 2 is apart from hydrophobic ditch 3 tops, 500～1000mm;
(3) by hydrophobic ditch 3 water outlet ends corresponding precipitation well 4 is set at foundation ditch 1 periphery, precipitation well 4 is located at the outside apart from basement basis outermost peripheral 5, and submersible pump 6 is set in the precipitation well 4, and submersible pump 6 is communicated with gutter 1 through drinking-water pipe 7.
Wherein, high water level is meant the saturated silt soil strata of foundation ditch present position near rivers, lake, zone, seashore, and groundwater table is higher, because condition restriction does not allow to adopt well-points dewatering, the drying that water-stop curtain can not guarantee substrate soil fully is set simultaneously.
As shown in Figure 1; The excavation method of the precipitation well 4 in hydrophobic ditch 3 in the said step (2) and the step (3) is: when foundation ditch 1 soil excavation digs to the absolute altitude of half height of pile cap; Layout plan according to hydrophobic ditch 3 and precipitation well 4 is measured unwrapping wire; Carry out the soil excavation of hydrophobic ditch 3 and the soil excavation of precipitation well 4 after accomplishing simultaneously, the precipitation well 4 in the said step (3) is located at beyond the 600mm apart from basement basis outermost peripheral 5.Hydrophobic ditch 3 layout in the said step (2) are elongated communicating structure or non-elongated communicating structure, and the hydrophobic ditch 3 in the present embodiment is linear structure.
As shown in Figure 4; Hydrophobic ditch 3 job practicess in the said step (2) are: the layer thickness that tiles in the bottom of hydrophobic ditch 3 earlier is the loose brick 12 of 60～120mm; The equal laying depth in hydrophobic ditch 3 both sides is the loose brick 13 of 120～240mm, and the interior empty width of hydrophobic ditch 3 is 120～160mm, and empty pine is filled out the rubble 19 that particle diameter is 20～30mm in the hydrophobic ditch 3; The top tiling thickness of hydrophobic ditch 3 is that 60～120mm length is the loose brick 14 of 240mm; Stay the wide sluicing seam 15 of 30～60mm between the loose brick 14 at top and the loose brick, lay 2～3 layers of fleece 16 at the top of hydrophobic ditch pine brick 14 upper surfaces and both sides pine brick 13 external surfaces then, fleece 16 is every square centimeter 9～16 order; The bottom and the precipitation well 4 of hydrophobic ditch 3 have 0.5～1% the gradient simultaneously, and the interior water of ditch is walked toward the precipitation well array smoothly.Acting as of fleece 16: make the water of soil again earth to be intercepted outside hydrophobic ditch 3, keep unimpeded toward drainage in the hydrophobic ditch 3.
Wherein, the sectional dimension of hydrophobic ditch 3 and arrange that density press that the water yield of pile cap place soil layer calculates decision at the bottom of the basement bottom board, thus the assurance water yield is let out through underground hydrophobic ditch 3 and is drained into precipitation well 4 and pump drainage to gutter 1 is drained; The pump drainage amount of the diameter of precipitation well 4 and submersible pump 6 is decided by the displacement of hydrophobic ditch.Precipitation well in the foundation ditch with the backfill of basement sidewall soil, can take out recycling with its reinforcing cage before the backfill after basement construction is accomplished.
A kind of high water level basement bottom board waterproofing system comprises pile cap, hydrophobic ditch 3, gutter 1, precipitation well 4 and submersible pump 6; Wherein, Interval location between pile cap below is provided with the hydrophobic ditch 3 that the loose brick of usefulness and fleece more than 1 are built into, and pile cap bottom 2 is apart from hydrophobic ditch 3 tops, 500～1000mm, and the ground 17 of pattern foundation pit supporting structure and foundation ditch bottom perimeter all are provided with and connect gutter 1; The outer setting precipitation well 4 of basement basis outermost peripheral 5; Hydrophobic ditch 3 water outlet ends are communicated with corresponding precipitation well 4, and submersible pump 6 is set in the precipitation well 4, and submersible pump 6 is communicated with gutter 1 through drinking-water pipe 7.
As shown in Figure 4; Said hydrophobic ditch 3 is the loose brick of 1 layer of 60～120mm of bottom laying, and the equal laying depth in both sides is the loose brick of 120～240mm, and empty width is 120～160mm in it; The interior empty pine of hydrophobic ditch 3 is filled out the rubble 19 that particle diameter is 20～30mm; The top tiling thickness of hydrophobic ditch 3 is that 60～120mm length is the loose brick 14 of 240mm, stays the wide sluicing seam 15 of 30～60mm between the loose brick 14 at top and the loose brick, and top pine brick 14 upper surfaces of hydrophobic ditch and both sides pine brick 13 external surfaces are laid 2～3 layers of fleece 16; Fleece 16 is every square centimeter 9～16 order, and the bottom and the precipitation well 4 of hydrophobic ditch 3 have 0.5～1% the gradient simultaneously.Acting as of fleece 16: make the water of soil again earth to be intercepted outside hydrophobic ditch 3, keep unimpeded toward drainage in the hydrophobic ditch 3.
As shown in Figure 5, said precipitation well 4 comprises reinforcing cage 8, stiffening ring 9, stirrup 10 and water strainer 11; Wherein, stirrup 10 spiral weldings are connected on the reinforcing cage 8, and stiffening ring 9 is welded and located on the reinforcing cage 8; Reinforcing cage 8 is outside to coat more than 3 layers every square centimeter and has 9～12 purpose water strainers 11; The length of reinforcing cage 8 is smaller or equal to 4.5m and less than the embedded depth of the foundation pit supporting pile of pattern foundation pit supporting structure, said precipitation well 4 is located at beyond the 600mm apart from basement basis outermost peripheral 5, also comprises travel switch; Travel switch is arranged on precipitation well 4 inwalls of submersible pump 6 tops; The lift of said submersible pump 6 is more than the 30m, and more than the diameter 50mm, said drinking-water pipe 7 is the hard PVC pipe; Mainly acting as of precipitation well 4 catchmented, precipitation and pump drainage water, and the specification of the size of precipitation well 4 and submersible pump 6 is all set according to actual needs.Drinking-water pipe 7 can not be used flexible pipe, must use the hard PVC pipe, in order to avoid husky with the pipe plug plug in the water that draws up, its hard PVC pipe is connected with 300～500mm Great Wall Software pipe with the vibration damping of the delivery port junction of submersible pump.Water strainer 11 all can adopt old safety net to replace with fleece 16, reaches the effect of twice laid.Precipitation well in the foundation ditch with the backfill of basement sidewall soil, can take out recycling with its reinforcing cage before the backfill after basement construction is accomplished.
Embodiment 2:
Present embodiment and embodiment 1 difference are: hydrophobic ditch 3 layout in the said step (2) are for curving structure, and hydrophobic ditch 3 water outlet ends are communicated with precipitation well 4 in the step (3).That is to say that the hydrophobic ditch 3 in the present embodiment can curve between cushion cap, as long as can deliver to precipitation well 4 to water.
The above-mentioned specific embodiment is the preferred embodiment of the utility model; Can not limit the utility model; Other any change or other equivalent substitute mode that does not deviate from the technical scheme of the utility model and made is included within the protection domain of the utility model.
Claims (4)
1. a high water level basement bottom board waterproofing system is characterized in that: comprise pile cap, hydrophobic ditch, gutter, precipitation well and submersible pump; Wherein, Interval location between pile cap below is provided with the hydrophobic ditch that the loose brick of usefulness and fleece more than 1 are built into, and the pile cap bottom is apart from hydrophobic ditch top 500～1000mm, and the ground of pattern foundation pit supporting structure and foundation ditch bottom perimeter all are provided with and connect the gutter; The outer setting precipitation well of basement basis outermost peripheral; Hydrophobic ditch water outlet end is communicated with corresponding precipitation well, in the precipitation well submersible pump is set, and submersible pump is communicated with the gutter through drinking-water pipe.
2. high water level basement bottom board waterproofing system according to claim 1; It is characterized in that: said hydrophobic ditch is the loose brick that 1 layer of 60～120mm laid in the bottom; The equal laying depth in both sides is the loose brick of 120～240mm; Empty width is 120～160mm in it, and the interior empty pine of hydrophobic ditch is filled out the rubble that particle diameter is 20～30mm, and the top tiling thickness of hydrophobic ditch is that 60～120mm length is the loose brick of 240mm; Stay the wide sluicing seam of 30～60mm between the loose brick at top and the loose brick; The top pine brick upper surface of hydrophobic ditch and both sides pine brick external surface are laid 2～3 layers of fleece, and fleece is every square centimeter 9～16 order, and the bottom and the precipitation well of hydrophobic ditch have 0.5～1% the gradient simultaneously.
3. high water level basement bottom board waterproofing system according to claim 1 is characterized in that: said precipitation well comprises reinforcing cage, stiffening ring, stirrup and water strainer; Wherein, The stirrup spiral is fixed on the reinforcing cage; Stiffening ring is sheathed to be fixed on the reinforcing cage; Reinforcing cage is outside to coat more than 3 layers every square centimeter and has 9～12 purpose water strainers, and the length of reinforcing cage is smaller or equal to 4.5m and less than the embedded depth of the foundation pit supporting pile of pattern foundation pit supporting structure, said precipitation well is located at apart from beyond the outermost peripheral 600mm of basement basis.
4. high water level basement bottom board waterproofing system according to claim 1; It is characterized in that: also comprise travel switch; Travel switch is arranged on the precipitation well inwall of submersible pump top, and said diving pump lift is more than the 30m, more than the diameter 50mm; Said drinking-water pipe is the hard PVC pipe, is connected with 300～500mm flexible pipe between the delivery port of its hard PVC pipe and submersible pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200945746U CN202440826U (en) | 2012-03-13 | 2012-03-13 | Waterproof system for high-water level basement foundation slabs |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200945746U CN202440826U (en) | 2012-03-13 | 2012-03-13 | Waterproof system for high-water level basement foundation slabs |
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| Publication Number | Publication Date |
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| CN202440826U true CN202440826U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200945746U Expired - Lifetime CN202440826U (en) | 2012-03-13 | 2012-03-13 | Waterproof system for high-water level basement foundation slabs |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535488A (en) * | 2012-03-13 | 2012-07-04 | 广东中城建设集团有限公司 | Waterproof construction method and system for bottom plate of high-water-level basement |
| CN104196046A (en) * | 2014-08-30 | 2014-12-10 | 上海联境建筑工程设计有限公司 | Water resisting and draining system for lowering underground anti-floating water level |
| CN107642252A (en) * | 2017-09-21 | 2018-01-30 | 青岛静力工程股份有限公司 | Old building free removal is double to increase rebuilding construction technique |
| CN110552361A (en) * | 2018-06-04 | 2019-12-10 | 中冶天工集团有限公司 | Pipe pile structure used as dewatering well |
-
2012
- 2012-03-13 CN CN2012200945746U patent/CN202440826U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535488A (en) * | 2012-03-13 | 2012-07-04 | 广东中城建设集团有限公司 | Waterproof construction method and system for bottom plate of high-water-level basement |
| CN104196046A (en) * | 2014-08-30 | 2014-12-10 | 上海联境建筑工程设计有限公司 | Water resisting and draining system for lowering underground anti-floating water level |
| CN107642252A (en) * | 2017-09-21 | 2018-01-30 | 青岛静力工程股份有限公司 | Old building free removal is double to increase rebuilding construction technique |
| CN110552361A (en) * | 2018-06-04 | 2019-12-10 | 中冶天工集团有限公司 | Pipe pile structure used as dewatering well |
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| GR01 | Patent grant | ||
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Granted publication date: 20120919 |
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| CX01 | Expiry of patent term |