CN104164895A

CN104164895A - Basement generating no water buoyant force

Info

Publication number: CN104164895A
Application number: CN201310199887.7A
Authority: CN
Inventors: 陈开向
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-05-15
Filing date: 2013-05-15
Publication date: 2014-11-26

Abstract

Provided is a basement generating no water buoyant force. Identical to the prior art, the basement generating no water buoyant force is provided with a bottom board, a wall and a foundation pit supporting system, wherein the bottom board and the wall are made of reinforced concrete. The basement generating no water buoyant force is characterized in that concrete or the reinforced concrete of the bottom board of the basement extends outwards towards the periphery to be in overlapping joint with row piles, secant piles and a waterproof curtain of the supporting system in a seamless mode, the part, between the supporting system and the wall of the basement, of the bottom board is brushed with bituminous flax with the thickness ranging from 1 cm to 10 cm, the position above the bituminous flax is refilled with water-stop agents or soil, and a pumping well deeper than a rubble or broken stone bed course below the bottom board is arranged between the wall of the basement and the waterproof curtain. Compared with the prior art, the basement generating no water buoyant force has the remarkable advantages that the basement is built on a watertight sludge layer or a watertight clay layer, all or most of uplift piles can be omitted, a great number of reinforcing steel bars can be laid on the bottom board of the basement, the process is simple, the construction period is shortened, steel is saved, energy saving and consumption reducing are achieved, and the basement is suitable for city construction of soft soil foundations of places along coasts and rivers of China.

Description

A kind of basement that does not produce water buoyancy

Technical field

The present invention relates to building foundation engineering field, relate in particular to a kind of basement that does not produce water buoyancy.

Background technology

As everyone knows, in the urban construction of China coast soft foundation, thousands of from the area of common single building high-rise building, the small underground chamber of square meters up to ten thousand, to manufacturing products for both peacetime and wartime us, ground is road, the underground store in square or greenery patches, subterranean commercial area, area several ten thousand is to the design of the big basement (being also the underground space) of hundreds of thousands square meter, all stereotyped under base plate, design quite a lot for overcoming the uplift pile of water uplift pressure, no matter be to be built in fluid-tight mud or argillic horizon from it, still build permeable layer of sand in, on sandy soil layer or gravel layer.

In soil mechanics textbook,, there is not free Free water in the elasticoplastic body that known mud and clay are made up of by different proportion soil particle, air, water three-phase.When water buoyancy only occurs in and has free Free water under basement bottom board, as the hole diving of earth's surface miscellaneous fill penetrates under base plate in rubble hardcore bed, or be layer of sand, sandy soil layer or the gravel layer containing free water under base plate, just produce the uplift pressure of water to basement bottom board.

Therefore, at the little basement in mud, argillic horizon Shang Jiandanzhuan building, or the large basement of the underground space, as produce the uplift pressure of water, be because the rubble hardcore bed that after basement wall, under backfill and base plate, 200mm is thick is used to lead to, become the path of surface water, in rainwater season, when surface water flows into bed course by loop, also just produce the buoyancy of water to basement bottom board.

Summary of the invention

The object of the present invention is to provide a kind of basement that does not produce water buoyancy, can make to be built in all types of basements on mud and argillic horizon, enter the passage of the rubble hardcore bed of basement bottom board below because having blocked surface water backfill seepage flow after miscellaneous fill layer and basement wall, the uplift pressure of the water under base plate has not been existed, also just needn't under base plate, design a large amount of uplift piles, base plate also needn't heavy reinforcement, thereby reduces foundation cost, save energy and reduce the cost, economize on resources.

The object of the invention is to be achieved through the following technical solutions: a kind of basement that does not produce water buoyancy, like the prior art, all there is base plate and the body of wall of steel concrete, and the required support system of excavation basement foundation ditch, as campshed, interlocking pile, cement-soil water-stop curtain, the stake of SMW engineering method, jet-grouted anchor pile, anchor pole, it is characterized in that, the concrete of basement bottom board or steel concrete are to campshed and the seamless overlap joint of water-stop curtain of surrounding extension and support system, the Concrete Thick 50-1000mm of extension, on the base plate between support system and basement wall, fill out the thick bitumen-dipped hemp of brush 1-10cm, backfill water-stop or backfill again on bitumen-dipped hemp, between basement wall and water-stop curtain, be provided with the degree of depth and exceed the underlie pumped well of rubble hardcore bed of base plate.Water-stop described herein is impermeablely to mould shape mud, or is mixed with mud or the mud of cement, or weak concrete.

The present invention compared with prior art, there is following remarkable advantage: on fluid-tight mud, argillic horizon, build all kinds of basements, can be by anti-group whole or large portion cancellation, basement bottom board can spread a large amount of because establishing the required agent on crack resistance of concrete shearing of uplift pile reinforcing bar less, technique of the present invention is simple, reduction of erection time, saving steel, energy-saving and cost-reducing, is suitable for the urban construction of China coast, riverine soft foundation.

Brief description of the drawings

Fig. 1 is basement one side generalized section of the present invention.

In figure: 1. miscellaneous fill, 2. mud, 3. ground level, 4. sprayed mortar 5. cement-soil water-stop curtains, 6. Guan Liang, 7. retaining piles, 8. pumped well, 9. sealing mud, 10. basement wall reinforcing bar, 11. basement walls, 12. basement bottom board absolute altitudes, 13. basement bottom boards, 14. basement bottom board reinforcing bars, 15.C10 plain concrete layer, 16. rubbles or hardcore bed, 17. engineering piles, 18. cement mixing piles of being reinforced by the district of breaking ground, 19. base plate extension concrete, 20. bitumen-dipped hemps.

Detailed description of the invention

An exemplary embodiments of the present invention, as Fig. 1:

1. in basement construction place, by drawing setting-out, the engineering pile (17) of first constructing under basement bottom board;

2. the cement mixing pile (18) of being reinforced by the district of being broken ground in construction cement mixing pile water stopping curtain (5) and hole in the miscellaneous fill floor (1) outside basement and mud (2);

3. at water-stop curtain (5) inner side construction supporting campshed (7), campshed (7) upper steel concrete Guan Liang (6);

4. in the time that 2 meters of soil excavations are dark, excavation slope paving reinforced mesh sprayed mortar (4);

5. when soil excavation is to design elevation, outer fix at basement wall (11) is uprightly buried 20-30cm diameter underground, the permeable gauze of its outer wrapping, and the plastic pipe that is drilled with permeable hole makes pumped well (8), filling pebble stone drainage outside pumped well (8) bottom and gauze;

6. in the mud at the bottom of foundation ditch (2), clean out engineering pile (17), at engineering pile (17) periphery and the full hall paving thick rubble hardcore bed of 200mm in the end, hole (16), on it, repave the thick C10 plain concrete of 100mm layer (15);

7. at C10 plain concrete layer (15) upper berth baseplate reinforcing bar (14), and continuous pouring concrete floor (13);

8. colligation basement wall reinforcing bar (10) and filling concrete wall (11), after body of wall (11) form removal, on the base plate between support system and basement wall (11), fill out the brush thick bitumen-dipped hemp of 8cm (20), body of wall (11) outer wall is also brushed bitumen-dipped hemp (20);

9. between body of wall (11) and campshed (7), backfill, containing the sealing mud (9) of 5% cement, completes the present invention's construction.

Claims

1. one kind does not produce the basement of water buoyancy, like the prior art, all there is base plate and the body of wall of steel concrete, and the required support system of excavation basement foundation ditch, as campshed, interlocking pile, cement-soil water-stop curtain, the stake of SMW engineering method, jet-grouted anchor pile, anchor pole, it is characterized in that, the concrete of basement bottom board or steel concrete are to campshed and the seamless overlap joint of water-stop curtain of surrounding extension and support system, the Concrete Thick 50-1000mm of extension, on the base plate between support system and basement wall, fill out the thick bitumen-dipped hemp of brush 1-10cm, backfill water-stop or backfill again on bitumen-dipped hemp, between basement wall and water-stop curtain, be provided with the degree of depth and exceed the underlie pumped well of rubble hardcore bed of base plate.

2. according to claim 1, water-stop described herein is characterized in that, water-stop is impermeablely to mould shape mud, or is mixed with mud or the mud of cement, or weak concrete.