CN2644525Y

CN2644525Y - Seepage control sunk well

Info

Publication number: CN2644525Y
Application number: CN 03278703
Authority: CN
Inventors: 盛爱华
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-09-19
Filing date: 2003-09-19
Publication date: 2004-09-29
Anticipated expiration: 2013-09-19

Abstract

The utility model relates to a caisson anti-seepage bottom sealing technique, actinomorphous blind ditches are arranged in the bottom layer of the plain concrete; a well is arranged in the cross of the blind ditches; broken stones or pebbles are filled in the blind ditches and the water sump well; a concrete pipe is arranged in the bottom layer of the plain concrete; the diameter of the concrete pipe is smaller than the diameter of the upper end of the water sump well; a steel pipe is arranged in the bottom layer of the reinforced concrete; the diameter of the steel pipe is smaller than the diameter of the concrete pipe; the water sump well, the concrete pipe and the steel pipe are connected successively; a sealing lid is arranged above the upper end of the steel pipe; the sealing lid is arranged inside the bottom layer of the reinforced concrete; concrete is cast inside the concrete pipe and the steel pipe. The utility model lowers the cost, fastens the schedule, ensures the quality and reduces the thickness of the bottom sealing plain concrete and bottom sealing reinforced concrete, greatly saving the cost.

Description

Seepage control sunk well

Technical field

The utility model relates to the antiseepage back cover technology of open caisson.

Background technology

Base plate plain concrete crack often appears in the open caisson back cover, and serious even back cover cracks in reinforced concrete and cause the open caisson infiltration has influenced the normal use of open caisson.The common method of head it off: 1, outside open caisson, beat precipitation well (generally being no less than four eyed), but the method cost height, the cycle is long.Two, adopt wet back cover technology, build underwater concrete, the interior external pressure of open caisson is equated, but the concrete that adopts the method to build requires height, technical sophistication, and quality is difficult to be guaranteed.

The utility model content

The utility model purpose is to design that a kind of cost is low, easy construction, can effectively prevent the open caisson that seeps water.

The utility model comprises the borehole wall, steel concrete back cover layer, plain concrete back cover layer, divides into radial french drain at plain concrete back cover layer, establishes collecting well in the intersection of french drain, fills rubble or cobble in french drain and collecting well; Placement diameter is less than the concrete pipe of collecting well upper end diameter in plain concrete back cover layer, placement diameter is less than the steel pipe of concrete pipe diameter in steel concrete back cover layer, and collecting well, concrete pipe, steel pipe connected successively, establish seal cover in the steel pipe upper end, seal cover is located in the steel concrete back cover layer; Concreting in concrete pipe, steel pipe.

The utility model is established collecting well on the open caisson base plate, the way of taking to dredge reduces back cover plain concrete and the early stage suffered outer gravitation of back cover steel concrete to greatest extent, treat that back cover plain concrete and back cover steel concrete reach after the design strength secondary shutoff collecting well again, can effectively reduce cost, the quickening progress, guarantee quality, can reduce the thickness of back cover plain concrete and back cover steel concrete effectively, the cost savings effect is remarkable.

For preventing that concrete from mixing mutually with cobble, give concrete effective isolation basic unit, can lay malthoid on the french drain top.

For the anti-pressure ability that increases concrete pipe and with the adhesion stress of plain concrete back cover layer, the utility model is also at concrete pipe outer wrapping wire gauze.

For preventing the infiltration of steel pipe and steel concrete back cover interlayer, the steel pipe external welding seal ring of the utility model below seal cover.

Description of drawings

Fig. 1 is the utility model structural representation

Among the figure, 1 caisson wall, 2 steel concrete back cover layers, 3 plain concrete back cover layers, 4 french drains, 5 malthoids, 6 rubbles or cobble, 7 concrete pipe, 8 collecting wells, 9 malthoids, 10 concrete, 11 seal rings, 12 flange seal end sockets, 13 steel pipes, 14 steel plates, 15 gauze wire cloths.

Specific embodiment

1, at well sinking after design elevation, the french drain 4 (quantity generally is no less than eight roads) of the excavation radial 500mm of being of a size of * 500mm is uniform in the shaft bottom at the bottom of open caisson, fills with rubble or cobble 6.

2, all french drain 4 is concentrated to the collecting well 8 of the diameter 1000mm * high 800mm at open caisson center, sand-free concrete tube 7 with diameter 600mm in the collecting well 8 buries to the shaft bottom, on connect diameter 600mm faucet concrete pipe 7, be connected to plain concrete back cover 3 end faces, concrete pipe 7 outsourcing wire gauze 15.

3, before concreting, reach collecting well 8 tops that contact with sand-free concrete tube 7 at all french drains 4 and cover two-

layer malthoid

5,9.

4, plain concrete back cover 3 reach design strength 40% after, tie up the base plate reinforcing bar,, stay mouth to meet diameter 325mm in the middle of the steel plate 14 of thick 8mm at sand-free concrete tube 7 loam cake diameter 800mm, the orchid of studying in France on the steel pipe 13 of wall thickness 6mm, two-sided full weld seal ring 11 twice on the steel pipe 13.

5, treat that underplate concrete reaches design strength after, extract ponding in the collecting well 8, in sand-free concrete tube 7 and in the steel pipe 13, use and fill with the early strength concrete 10 of steel concrete back cover layer 2 with intensity, and on steel pipe 13 adpting flange end socket 12, build steel concrete back cover layer 2 more thereon to base plate steel concrete end face.

Claims

1, Seepage control sunk well comprises the borehole wall, steel concrete back cover layer, plain concrete back cover layer, it is characterized in that dividing into radial french drain at plain concrete back cover layer, establishes collecting well in the intersection of french drain, fills rubble or cobble in french drain and collecting well; Placement diameter is less than the concrete pipe of collecting well upper end diameter in plain concrete back cover layer, placement diameter is less than the steel pipe of concrete pipe diameter in steel concrete back cover layer, and collecting well, concrete pipe, steel pipe connected successively, establish seal cover in the steel pipe upper end, seal cover is located in the steel concrete back cover layer; Concreting in concrete pipe, steel pipe.

2,, it is characterized in that at described concrete pipe outer wrapping wire gauze according to the described Seepage control sunk well of claim 1.

3,, it is characterized in that laying malthoid on the french drain top according to the described Seepage control sunk well of claim 1.

4, according to the described Seepage control sunk well of claim 1, it is characterized in that establishing steel plate in the junction of concrete pipe and steel pipe, offer mesopore in the steel plate.

5,, it is characterized in that the steel pipe external welding seal ring below seal cover according to the described Seepage control sunk well of claim 1.