CN202194148U

CN202194148U - Waterproof curtain

Info

Publication number: CN202194148U
Application number: CN2011202512538U
Authority: CN
Inventors: 张炳信; 陈铿帆
Original assignee: SHENZHEN JINTAI CONSTRUCTION ENGINEERING Co Ltd; SHENZHEN HONGRONGXUAN CONSTRUCTION ENGINEERING Co Ltd
Current assignee: SHENZHEN JINTAI CONSTRUCTION ENGINEERING Co Ltd; SHENZHEN HONGRONGXUAN CONSTRUCTION ENGINEERING Co Ltd
Priority date: 2011-07-15
Filing date: 2011-07-15
Publication date: 2012-04-18
Anticipated expiration: 2021-07-15

Abstract

An embodiment of the utility model discloses a waterproof curtain, which is formed by engagement of cement mixing piles and sleeve cast-in-place piles on the outer side of the wall of a foundation pit. The waterproof curtain makes full use of the anti-bending performance of the sleeve cast-in-place piles and the waterproof performance of the cement mixing piles and is safe in operation and orderly and regular in reinforced concrete piles formed through casting. The waterproof curtain formed by the cement mixing piles engaging the sleeve cast-in-place piles is capable of effectively preventing water seepage, water leakage, quicksand and the like of a traditional foundation pit, is capable of effectively preventing and treating common quality faults of bored cast-in place piles of other types such as collapsing holes, necking and the like, is higher in construction speed and lower in cost than traditional underground continuous walls and bored engagement piles, and avoids the problem of expanding of the sleeve cast-in-place piles in weak soil layers by constructing the cement mixing files firstly to form restriction to the sleeve cast-in-place piles. By the aid of support of the sleeve cast-in-place piles and the cement mixing piles enabling soil to be solidified and hardened, excavation of earth volume is decreased, influence on peripheral geology is reduced, influence of construction on the ambient environment and environmental pollution are reduced, and green construction is realized.

Description

A kind of water-stop curtain

Technical field

The utility model relates to the realm of building construction, relates in particular to a kind of water-stop curtain.

Background technology

Along with developing rapidly of China's construction market, the emerge in multitude of high level and super highrise building is in the high area of groundwater table, near filling out Haiti district, alluvial delta area, the regional deep-foundation pit engineering ubiquity of complicated geological condition such as mud or drift sand being arranged.For realizing the sealing purpose of deep foundation ditch, prior art provides multiple water-stop curtain to comprise diaphragm wall, drill-pouring interlock stake and sleeve pipe perfusion interlock stake etc.Wherein more general diaphragm wall and perfusion interlock stake; And cost is lower and be the water-stop curtain that the mutual interlock of sleeve filling pile forms to lower a kind of of ambient influnence; Its sealing principle mainly is to form second sleeve filling pile at the middle concrete perfusion once more of adjacent two first sleeve filling piles that construct previous stage, and supporting and sealing are carried out in the mutual interlock formation of first sleeve filling pile and second sleeve filling pile " piling wall ".

Because second sleeve filling pile must be accomplished construction before concrete final set; This requires very high to concrete ultra retarding performance; In case cause surpassing slow setting stake final setting time because of plant equipment breaks down; To make first sleeve filling pile and second sleeve filling pile can't form occluding relation, even can't construct, directly have influence on the waterproof between piles effect.

The utility model content

The utility model embodiment technical problem to be solved is, a kind of water-stop curtain is provided, and infiltration occurs, leaks and the drift sand phenomenon to prevent foundation ditch, guarantees construction high efficiency and low cost.

In order to solve the problems of the technologies described above, the utility model embodiment has proposed a kind of water-stop curtain, comprises the cement mixing pile that keeps at a certain distance away and be provided with along foundation pit walls, and is arranged between adjacent two cement mixing piles and the sleeve filling pile of interlock with it.

The utility model embodiment forms water-stop curtain through be engaged in the foundation pit walls outside by cement mixing pile and sleeve filling pile, has following beneficial effect:

1, adopts cement mixing pile interlock sleeve filling pile to form water-stop curtain, can prevent effectively that traditional foundation ditch from infiltration occurring, leaking and phenomenon such as drift sand, can effectively prevent and treat the common quality defect of other types drill hole pouring piles such as the hole that collapses, constriction;

2, make full use of the anti-bending strength of sleeve filling pile and the sealing performance of cement mixing pile, adopt all casing drill bored pile, handling safety, the reinforced concrete pile of pouring moulding is rule neatly;

3, faster than traditional diaphragm wall, boring interlock pile driving construction speed, cost is lower, and economic benefit is obvious;

4, first construction cement mixing pile forms the constraint of sleeve filling pile and has avoided the problem of sleeve filling pile in the hole enlargement of weak soil property layer;

5, adopt the supporting of sleeve filling pile, utilize cement mixing pile to make the soil solidifying sclerosis simultaneously, the excavation that reduces earth volume reaches the influence to peripheral geology, and has reduced influence and the environment pollution of construction to surrounding environment, green construction.

Description of drawings

Fig. 1 is the main flow chart of job practices of the water-stop curtain of the utility model embodiment.

Fig. 2 is the structural representation of the gathering sill 1 of the utility model embodiment.

Fig. 3 is the flow chart of the sleeve filling pile construction among the utility model embodiment.

Fig. 4 is the sleeve filling pile of the utility model embodiment and the occluding relation figure of cement mixing pile.

Fig. 5 is the structural representation of the water-stop curtain of the utility model embodiment.

The specific embodiment

Below in conjunction with accompanying drawing, embodiment is elaborated to the utility model.

As shown in Figure 1, the job practices of the water-stop curtain of the utility model embodiment mainly comprises:

101, as shown in Figure 2, to forming the gathering sill 4 of reserving sleeve filling pile construction position 2 and cement mixing pile construction position 3 in the construction section of top, foundation pit walls 1 outside;

102, the cement mixing pile construction is carried out in the cement mixing pile construction position 3 in construction section, forms cement mixing pile, particularly, repeats following action and forms until cement mixing pile 6:

Adopt rig to cement mixing pile construction position 3 positive-circulation drillings to projected depth, anti-afterwards circulation carry bore and gunite to working standard face under the distance of 0.2-0.4 rice, this distance is 0.2 meter, 0.3 meter of value or 0.4 meter etc. specifically;

103; To carrying out the sleeve filling pile construction in the sleeve filling pile construction position 2 of accomplishing cement mixing pile construction and satisfy between adjacent two cement mixing piles 6 of sleeve filling pile execution conditions; Form sleeve filling pile 5 with cement mixing pile 6 interlocks; Particularly, step 103 can comprise flow process as shown in Figure 3:

301, drill machine with casing is in place;

302, with sleeve pipe centered cover pipe perfusion pile construction in place position 2;

303, the verticality of observing and controlling sleeve pipe;

304, adopt drill machine with casing to be pressed into the first segment sleeve pipe to sleeve filling pile construction position 2;

305, the sleeve pipe position grabbed bucket fetch earth;

306, sleeve pipe creeps into until the sleeve filling pile projected depth by joint, forms the sleeve filling pile hole;

307, the cleaning loosened soil is also inspected for acceptance;

308, in the sleeve filling pile hole, lay reinforcing cage;

309, the concrete pouring conduit is laid in lifting;

310, adopt the concrete pouring conduit in the sleeve filling pile hole of laying reinforcing cage, to pour into concrete, finally form sleeve filling pile 5;

After step 102,103, the sleeve filling pile 5 in the water-stop curtain of the utility model embodiment forms occluding relation with cement mixing pile 6 can be as shown in Figure 5;

104, in sleeve filling pile 5 and 6 jacking row of cement mixing pile Guan Liang construction, form hat beam 7;

According to demand, the construction of brace summer in can also carrying out after 104 is specifically extended the interior brace summer 8 that steel concrete is set by hat beam 7 to the direction of foundation ditch,

Through after the step 104, the water-stop curtain of the utility model embodiment can be as shown in Figure 6.

As a kind of embodiment, the sleeve filling pile execution conditions are that the sleeve filling pile construction was accomplished before adjacent two cement mixing pile final set, and cement mixing pile adopts mixes the ultra slow setting stake of retarding agent; It satisfies slow setting time T=3t+K, and wherein, T is cement mixing pile slow setting time (initial setting time); K is the storage time; Generally remove 1.0-2.0t, t is a single pile pile required time, and test pile t is 10-15 hour.

As a concrete construction example, certain A plot, regional center district engineering, about 10000 ㎡ of floor space plan to build commercial and residential building and basement, and the excavation of foundation pit degree of depth reaches 8.9m.This engineering place absolute altitude is+5.1m to put sloping cutting depth 2.6m, the occlusion structure of its water-stop curtain employing sleeve filling pile and cement mixing pile; Wherein, sleeve filling pile stake top mark height+1.5m, cement mixing pile stake top mark height+1.5m; Sleeve filling pile and cement mixing pile stake top is provided with 1.2m * 1m Guan Liang, along the foundation ditch arranged around, and in one steel concrete of stake apical cap beam setting brace summer; Absolute altitude-3.9m at the bottom of the foundation ditch, sleeve filling pile length 13-16m, cement mixing pile length 13-16m; Sleeve filling pile and cement mixing pile are gone into the foundation ditch bottom lengths greater than 7.6m, and pass layer of sand and be not less than 1m.This water-stop curtain has that supporting and protection structure is firm, stagnant water effect is good, the construction environment influence is little, constructing operation simply reaches the characteristics of practicing thrift cost, and is easy to promote.

It is understandable that the length of sleeve filling pile and cement mixing pile can be selected according to foundation depth, is not limited in 13-16m, values such as 50m also are fine.

The above is the specific embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection domain of the utility model.

Claims

1. a water-stop curtain is characterized in that, comprises the cement mixing pile that keeps at a certain distance away and be provided with along foundation pit walls, and is arranged between adjacent two cement mixing piles and the sleeve filling pile of interlock with it.

2. water-stop curtain as claimed in claim 1 is characterized in that, said cement mixing pile and sleeve filling pile stake top are provided with Guan Liang.

3. according to claim 1 or claim 2 water-stop curtain is characterized in that the length of said cement mixing pile and sleeve filling pile is 13-16m.