CN2853905Y

CN2853905Y - Foundation structure of anti-sink foundation

Info

Publication number: CN2853905Y
Application number: CN 200520112314
Authority: CN
Inventors: 唐业清; 卢明全; 吴如军; 何新东
Original assignee: 唐业清; 卢明全; 吴如军; 何新东
Current assignee: Guangdong Jinhuihua Group Co., Ltd.
Priority date: 2005-07-06
Filing date: 2005-07-06
Publication date: 2007-01-03
Anticipated expiration: 2015-07-06

Abstract

A anti-settlement foundation structure comprises an armored concrete slab with a side protecting plate and a curb wall comprising a rotary blow-out churning peg formed by occlusion of double cements under the plate, wherein the curb wall is arranged with a close double grey pile with complex effect, such as distension, compaction, absorption, heating and the like, and a mattress layer is arranged between the top of curb wall and the double grey pile and the plate. By the strengthening measure, the utility model forms an anti-settlement device which can prevent mud or thick soft soil foundation from sinking or squeezing. The utility model can assure that the building below six floors can be used in normal. The utility model has clear action principle, low cost, easy construction, and marked effect.

Description

A kind of anti-depression foundation structure

Technical field

The utility model relates to a kind of 6 layers of foundation structure with the anti-depression of lower room on the deep mud saturated soft soil ground that are built in.

Background technology

At present by the sea, build the house for a long time on the full soft foundation of deep mud such as lakeside, river marsh ground, building has a large capacity and a wide range, but excessive depression or the rhegma of mostly occurring tilts, as all very high with the deep pile foundation cost, and adopt common strip foundation, single raft foundation etc. all can cause a large amount of sinkings even inclination, cause very large economy loss, the case history of failure is a lot.

Summary of the invention

The purpose of this utility model just provides a kind of effective, easy, anti-depression foundation structure that cost is low, to prevent to be built in 6 layers of excessive sinking with lower room on the deep mud saturated soft soil ground.

Technical solutions of the utility model are: the steel concrete raft plate that comprises the vertical backplate of band side, this raft plate is down the retaining wall that the engaged rotating spraying mixture pile of double cement-soil constitutes all around, in this retaining wall, be provided with have expansions, two ash stakes comprehensive effect, solid matter such as compacted, suction, heating, between the top of this retaining wall and two ash and raft plate, be provided with mattress layer.

The thickness of the vertical backplate of described steel concrete raft plate and side is 30～50cm, and the concrete grade is not less than C30, should be according to arrangement of reinforcement and plate thickness in the number of floor levels final decision plate; Raft plate periphery is the vertical backplate of the side of continuous sagging about 1m, and the raft plate top surface is an elevation of floor level, and the raft plate combines with terrace.

Long 2 times of the two ashes crust layer thickness that forms that are chosen as of the stake of described rotating spraying mixture pile are generally about 15m, and the stake footpath is not less than 50cm, and vertical construction can not be crooked, prevents weak soil, mucky soil and leaked water.

Described mattress layer thickness is 20～30cm, by rubble, peastone or the close reality of tamping of rough sand folder cobble material.

The stake of described two ash stakes is long should to be generally 7～8m, stake footpath 40cm, pile spacing 1.5m～2.0m, the weight ratios of two ash material: quicklime: flyash: coarse sand=6: 3: 1 greater than subsidiary stress figure 1m under zero point; Each filler 1m continues construction again after the compacting, the stake top is the plain soil layer of close rammer 1m.

The beneficial effects of the utility model are: by above-mentioned supporting anti-depression foundation special underpin measure, constitute one and effectively prevent mud or the anti-depression device that saturated deep soft soil foundation sinks or side direction is extruded.Can guarantee the normal use of building below 6 layers.The utility model mechanism of action is clear and definite, cost is low, easy construction, effect are remarkable, is that the inventor has summed up the lesson of inclination of sinking of a large amount of houses, design and effective achievement on mud saturated soft clay ground.

Description of drawings

Fig. 1 is the vertical cross-sectional schematic of overall structure of the present utility model;

Fig. 2 is the A-A cross-sectional schematic of Fig. 1;

Fig. 3 is the two ash stake of a utility model formation of pile schematic diagram;

Fig. 4 is the cross sectional representation of the laying out pile of the two ash stakes of the utility model, pile, expansion, compacted consolidation effect;

Fig. 5 a is a single pile construction schematic diagram, and Fig. 5 b is the mutual interlock pile of two a piles schematic diagram, and Fig. 5 c is the cross-sectional structure schematic diagram of double interlock stake;

Fig. 6 is the structural representation of the utility model application state;

Fig. 7 is the utility model mechanism of action schematic diagram.

Among the figure: 1 for being no more than 6 layers top building construction, and 2 for being with the steel concrete raft plates of the vertical backplate of side, and 21 is reinforcing bar, 3 is rubble, the sand gravel mattress layer, 4 is peripheral double cement-soil rotating spraying mixture pile retaining wall, and 41 is agitator, and 42 is the cement-soil in the stake hole, 5 is two ash stakes, 51 for ramming the pile body of material in the middle of two ash stakes, 52 is two ash stake expansion heating layers, and 53 is the compacted layer of two ash stakes, 54 is two ash stake pore-formings, 55 is filler, and 56 is hammer ram, and 57 is plain native pile crown, the 6th, plate hangs down, the 7th, ground, the 8th, selfweight stress figure, 9 is subsidiary stress figure, 10 is hardcore bed, and 11 for going along with sb. to guard him the effect of contraction power of the anti-lateral deformation of piling wall.

The specific embodiment

Referring to Fig. 1 and Fig. 2, the utility model unitary construction comprises the steel concrete raft plate 2 of the vertical backplate 6 of band side, this raft plate is for 2 times the retaining wall that the engaged rotating spraying mixture pile of double cement-soil 4 constitutes all around, in this retaining wall, be provided with have expansions, two ash stakes 5 comprehensive effect, solid matter such as compacted, suction, heating, be provided with mattress layer 3 at the top and 2 of the raft plates of the retaining wall that constitutes by rotating spraying mixture pile 4 and two ash 5.

The thickness of the vertical backplate 6 of described steel concrete raft plate 2 and side is 30～50cm, and the concrete grade is not less than C30, should be according to arrangement of reinforcement 21 and plate thickness in the number of floor levels final decision plate.Raft plate 2 peripheries are the vertical backplate 6 of the side of continuous sagging about 1m, and raft plate 2 end faces are elevation of floor level, and raft plate 2 combines with terrace.According to the purposes and the load size of building, fill and lead up on the mattress layer of compacting the plain concrete bed course 10 of shop 10cm earlier at supporting foundation, upper berth reinforcing bar 21 is poured into a mould the raft board concrete again, and the vertical plate of periphery also will be by structure requirement arrangement of reinforcement.Health can continue construction thereon after 28 days, should note measuring raft plate 2 end face absolute altitudes (elevation of floor level is referring to Fig. 6) during construction, should not produce ± error of 2cm.

Mattress layer 3 layerings adopt rubble, coarse sand or/and sand gravel etc. tamp, and available vibratory compactor or road roller roll compacting.

Referring to Fig. 3 and Fig. 4, two ash stake 5 of the present utility model is as two ash stakes of crust layer, stake is long should be greater than ground subsidiary stress figure 1m (referring to Fig. 6) under zero point, be generally about 7～8m, stake footpath 40cm, pilespacing 1.5～2.0m, two ash material are caustic lime block (being not more than 5～10cm free from admixture), flyash (water content is not more than 5%), its batching is by weight: quicklime: flyash: coarse sand=6: 3: 1.Earlier with squeezing into steel pipe or mechanical piling hole 54, each filler 1m continues construction again after the compacting during construction, and the stake top is the plain soil layer of close rammer 1m.

Caustic lime block should be pounded in advance and be broken into piece in two ash material, is not more than 5～10cm, does not contain stone or organic matter, can not make moist or soak; Flyash should be dry, free from admixture, and water content is no more than 5%; Medium sand should totally not contain mud (also available aggregate chips or low strength cement replace).

Continue construction after tamping in the hole with 100kg hammer ram 56 again, pile crown 57 usefulness 1m rammed earths are clogged.Stake footpath, squeezed back can reach more than the 60cm, because two ash material have integrative consolidation characteristics such as imbibition, compacted, heating, make and be reinforced the compacted power of holding soil layer 52 and 53 of scleroma of soil layer formation, bear the house load, compaction deformation is very little, it has been zero that imposed load passes to the crust layer bottom, and the weak soil layer under it is no longer made a difference.But substratum can not lateral drainage or is extruded, otherwise can cause crust layer to sink, and the long cement mixing method wall of therefore peripheral 15m can play and prevent down extruding of soil layer for sleeping in, guarantees base stabilization.But never can construct around behind the house building precipitation or a large amount of excavation, this can make built house that excessive sinking or inclination rhegma take place.

Referring to Fig. 5 a～Fig. 5 c, long 2 times of being chosen as two ashes crust layer thickness that forms of the stake of rotating spraying mixture pile 4 of the present utility model are generally about 15m, and the stake footpath is not less than 50cm, and vertical construction can not be crooked, prevents weak soil, mucky soil and leaked water.Its construction formation of pile is: stir repeatedly secondary by the 41 pore-forming slip castings of rotary jet stirring machine and form vertical cement soil pile 4, general stake footpath 50cm, the long 15m of stake (can adjust the size construction at last) by project blue print, elder generation work order campshed, before not solidifying knot, continue construction second row then again, want interlock 10cm between not only every campshed, and also answer interlock 10cm between double-row pile, each interlock situation is shown in Fig. 5 b.The above ground portion reply pile crown of the cement-soil pile after finishing is repaired leveling, cuts off the pile head breaking part, and is floating with the plain concrete material, concordant with the two grey pile crowns of periphery.

Referring to Fig. 7, be the utility model mechanism of action schematic diagram, 9 for acting on effective subsidiary stress figure of substrate, abscissa P among the figure ₀Effective additonal pressure of expression bases, 8 is the selfweight stress distribution map of soil, O is the zero point of subsidiary stress figure, h ' is the height of O point to ground, the lower end of two ash stakes 5 is to 1m place at least below the O point, h is as the reference values of determining that two ash stake 5 is long, and 11 do not produce the lateral deformation schematic diagram for the weak substratum side direction under the crust layer is retrained by cement mixing method circummure protection structure.

Effective stress figure is the pressure that expression house load is produced on the unit area ground, is also referred to as additonal pressure.The size of its stress value is successively decreased with the degree of depth, has not been subjected to the influence of house load to the soil layer below zero point.

Selfweight stress figure is the pressure that is produced by the deadweight of soil that this weak soil layer of expression is born on unit area under the deadweight effect, increases with the degree of depth, and be resident stress.

As seen from Figure 7, subsidiary stress be below zero point be the selfweight stress resided in action, the load in house is inoperative.

Claims

1. anti-depression foundation structure, it is characterized in that: the steel concrete raft plate that comprises the vertical backplate of band side, this raft plate is down the retaining wall that the engaged rotating spraying mixture pile of double cement-soil constitutes all around, in this retaining wall, be provided with have expansions, the two ash stakes of solid matter of compacted, suction, heating comprehensive effect, between the top of this retaining wall and two ash and raft plate, be provided with mattress layer.

2. anti-depression foundation structure according to claim 1 is characterized in that: described raft plate periphery is the vertical backplate of the side of continuous sagging about 1m, and the raft plate top surface is an elevation of floor level, and the raft plate combines with terrace; The thickness of the vertical backplate of described steel concrete raft plate and side is 30～50cm, and the concrete grade is not less than C30, should be according to arrangement of reinforcement and plate thickness in the number of floor levels final decision plate.

3. anti-depression foundation structure according to claim 1 is characterized in that: long 2 times of the two ashes crust layer thickness that forms that are chosen as of the stake of described rotating spraying mixture pile, be generally about 15m, and the stake footpath is not less than 50cm.

4. anti-depression foundation structure according to claim 1, it is characterized in that: described mattress layer thickness is 20～30cm, by rubble, peastone or close the filling out of rough sand folder cobble material.

5. anti-depression foundation structure according to claim 1 is characterized in that: the stake of described two ash stakes is long should to be generally 7～8m greater than subsidiary stress figure 1m under zero point, stake footpath 40cm, and pile spacing 1.5m～2.0m can reach 60cm after expanding in the stake footpath; Each filler 1m, the stake top is the plain soil layer of close rammer 1m.