CN202706047U

CN202706047U - Water retaining structure drainage structure for strong pervious foundation

Info

Publication number: CN202706047U
Application number: CN2012203117615U
Authority: CN
Inventors: 张国龙; 余毓琛; 江永强; 王力理; 邢莉; 匡成华; 李丹
Original assignee: ANHUI SURVEY AND DESIGN INSTITUTE OF WATER CONSERVANCY AND HYDROPOWER
Current assignee: ANHUI SURVEY AND DESIGN INSTITUTE OF WATER CONSERVANCY AND HYDROPOWER
Priority date: 2012-06-30
Filing date: 2012-06-30
Publication date: 2013-01-30
Anticipated expiration: 2022-06-30

Abstract

The utility model relates to a water retaining structure drainage structure for a strong pervious foundation. A concrete base plate is arranged on the strong pervious foundation, more than two rows of seepage-proof holes are evenly distributed in the concrete base plate, each seepage-proof hole is a reinforced concrete hole which is 500 millimeters in diameter, the upper portion of each seepage-proof hole is in a shape of a well mouth, and the upper portion of each seepage-proof holes extend upward to the outside of the concrete base plate, a cover plate is arranged at the position of the well mouth of each seepage-proof hole, and through holes are evenly distributed in each cover plate. More than four side-direction water outlets are evenly distributed in the wall of each seepage-proof hole under each cover plate, and each seepage-proof hole is filled with filtering materials. According to the water retaining structure drainage structure for the strong pervious foundation, a water discharging method and a repairing method of a traditional drainage structure are improved, the water retaining structure drainage structure is mainly used for drainage of the strong pervious foundation which has high requirements for the drainage, the problems that the traditional drainage structure is easy to clog, low in efficiency, hard to repair and the like are solved, and drainage effect and seepage-proofing safety of the foundation are guaranteed.

Description

The water retaining structure row who is used for the highly permeable ground is oozed structure

Technical field

The utility model belongs to improvement of the ecological environment and resist technology field, specifically belongs to field of civil engineering, is specifically related to hydraulic structure pervious foundation antiseepage discharge structure.

Background technology

The water retaining structure ground generally has the antiseepage requirement, and oozing structure discharge infiltration by row is the way of foundation anti-seepage necessity.Row is oozed structure and is comprised of loaded filter and drain hole, its function is drained structure foundation infiltration current safely and effectively, can prevent that seepage deformation from appearring in seepage exit district foundation soil, keep seepage flow under foundation stable, and can reduce antiseepage section structure foundation osmotic pressure and namely act on uplift pressure on the basis, increase building antiskid and stability.Conventional row is oozed about structure drainage bore dia 100mm, and general porous is arranged the interval more and is laid in building and leads and ooze on district's base plate, and pitch-row 1～2m fills out large particle diameter filtrate in the loaded filter in the hole.Characteristics are simple in structure, easy construction, but the draining aperture is little, and aperture base slab face, the reasons such as construction or alluvial easily cause drain hole to stop up, and affect drainage effect, and are difficult for silting thing cleaning in the hole, and drain hole of a specified duration lost efficacy, and it is ineffective that structure is oozed in the row of making.The result can cause the ground osmotic pressure to rise, and affects engineering safety.Water retaining structure seepage in foundation seepage amount is larger on the highly permeable grounds such as sandy soil, and the ground Antiseepage stability is poor, is to guarantee building safety, and it is more reliable, effective that needs row is oozed structure.Through examining, conventional row is oozed structure and has been used drainage efficiency decline of a specified duration, and is difficult to after losing efficacy recover from a plurality of engineering operations.

Summary of the invention

Ooze in order to solve conventional row that the silting that structure exists is smooth, decrease in efficiency, be difficult to the problem such as maintenance, ensure that water seepage drainage effect and foundation anti-seepage safety, the utility model provide a kind of water retaining structure for the highly permeable ground to arrange and oozes structure.

Concrete Technological improvement plan is as follows:

Be provided with concrete floor 6 at the highly permeable ground, be laid with the above anti-seepage hole of two rows on the concrete floor 6, described anti-seepage hole is the reinforced concrete hole of internal diameter 500 ㎜, the top of anti-seepage hole is pit shaft 1, pit shaft 1 is positioned at outside the concrete floor 6, the well head place of pit shaft 1 is provided with cover plate 2, the uniform through hole that offers on the cover plate 2; Be laid with the side water exit mouth 4 more than four on the borehole wall of the pit shaft 1 of cover plate 2 belows; Be filled with filtrate 5 in the described anti-seepage hole.

Spacing between the anti-seepage hole of adjacent two rows is 2000 ㎜, and the array pitch of anti-seepage hole is 2500 ㎜.

Useful technique effect of the present utility model is: by strengthening the draining aperture, setting up the new structures such as aperture cover plate and a plurality of multi-layer and multi-directional delivery ports, improve row and oozed the arrangement works mode, improve drainage efficiency, improve row and ooze the structure maintenance mode, improved the draining protection.The size in single hole is large, and the multi-direction mouth of a river that sets out of a plurality of multilayers is arranged on the macropore, and draining is unobstructed; Delivery port is subjected to effect of reservoir siltation less a little more than the base plate face; Drain hole top is established movable cover plate and can be protected the filter material layer hole in, also can open, and to the little delivery port silting thing cleaning on filtrate in the hole and cover plate, the borehole wall, the drain hole maintenance is convenient, ensure drain hole permanent use effective.The utility model structure is the effective measures of poor for seepage capability, that water percolating capacity is large highly permeable foundation anti-seepage draining, both can satisfy structure foundation shallow-layer antiseepage drainage requirement, also can adapt to the larger deep foundation seepage flow draining needs of concentrated water outlet such as being provided with the draining deep-well.

Description of drawings

Fig. 1 is that the utility model row is oozed structural representation.

Fig. 2 is the cross-sectional figure of Fig. 1.

Fig. 3 is Fig. 4 heavy caliber drain hole aperture top view.

Fig. 4 is heavy caliber drain hole sectional drawing.

Sequence number among the upper figure: pit shaft 1, cover plate 2, vertical delivery port 3, side water exit mouth 4, filtrate 5, concrete floor 6.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described by embodiment.

Embodiment

Referring to Fig. 1 and Fig. 2, be provided with concrete floor 6 at water retaining structure highly permeable ground, be laid with the above anti-seepage hole of two rows on the concrete floor 6.Referring to Fig. 3 and Fig. 4, anti-seepage hole is the reinforced concrete hole of diameter 500 ㎜, and the top pit shaft 1 of anti-seepage hole, pit shaft 1 extend upwardly to concrete floor 6 outer 300 ㎜, and the well head place of pit shaft 1 is provided with cover plate 2, the uniform through hole that offers on the cover plate 2; Be laid with eight side water exit mouths 4 on the borehole wall of the pit shaft 1 of cover plate 2 belows; Be filled with filtrate 5 in the anti-seepage hole.Spacing between the anti-seepage hole of adjacent two rows is 2000 ㎜, and array pitch is 2500 ㎜.

Be used for northern lock pumping plant antiseepage draining, pumping plant sand-layer foundation top still has the covering layer about 2～3m, and layer of sand artesian water potential is higher under the nature.According to the Analysis of The Seepage result, flood season, the artesian water potential of Forebay of Pumping Station reached 30～40% during high water level, and the basic Antiseepage stability of standing can not meet design requirement.And dry season groundwater table generally also about the 10.0m elevation, the station base Antiseepage stability the when forebay is overhauled constitutes a threat to.Can judge on distribution of strata, the basic artesian water Source Of Supply of standing is wide, and the highly permeable layer distributes dark, is difficult to prove effective in the stifled measure of project seepage controlling employing, and main dependence strengthened drainage measure reduction seepage flow potential, reduces seepage pressure.For this reason, in the forebay, arrange the underdrainage sand drain, and the decompression sand furrow of excavation bottom width 2.6m, long 11.7m.A large amount of seepage in foundation seepages enter under the Forebay of Pumping Station base plate by underdrainage sand drain, decompression sand furrow.For effectively discharging the substrate infiltration, the protection foundation soil is not destroyed, and has adopted novel row to ooze structure.The concrete base plate is divided into wide 21.2m in the forebay, the sandstone loaded filter of total thickness 80cm.Loaded filter from bottom to top filter material is followed successively by fine sand, medium sand, coarse sand and melon seeds sheet, every bed thickness 20cm.Quincuncial arrangement 4 is arranged 24 heavy caliber drain hole, spacing 2.5m, array pitch 2.0m on the base plate of forebay.Drain hole diameter 50cm, elevation of top surface exceed forebay base plate face 30cm.

Analyze with the piezometer tube measured data as calculated, stand basic seepage flow exit gradient all in overlying soil allows the gradient scope, and Forebay of Pumping Station effectively reduces the seepage flow potential after having adopted novel row to ooze structure, the forebay potential has descended more than 30%, and the engineering measures for draining leakage can satisfy the basic antiseepage safety requirements in station.

Claims

1. the water retaining structure row who is used for the highly permeable ground is oozed structure, described highly permeable ground is provided with concrete floor (6), be laid with the above anti-seepage hole of two rows on the concrete floor (6), it is characterized in that: described anti-seepage hole is the reinforced concrete hole of internal diameter 500 ㎜, the top of anti-seepage hole is pit shaft (1), pit shaft (1) is positioned at outside the concrete floor (6), and the well head place of pit shaft (1) is provided with cover plate (2), the upper uniform through hole that offers of cover plate (2); Be laid with the side water exit mouth (4) more than four on the borehole wall of the pit shaft (1) of cover plate (2) below; Be filled with filtrate (5) in the described anti-seepage hole.

2. described water retaining structure row for the highly permeable ground is oozed structure according to claim 1, it is characterized in that: the spacing between the anti-seepage hole of adjacent two rows is 2000 ㎜, and the array pitch of anti-seepage hole is 2500 ㎜.