CN202124865U

CN202124865U - Quick plugging device for dewatering wellhead of sand-free cement pipe deep well

Info

Publication number: CN202124865U
Application number: CN2011202192084U
Authority: CN
Inventors: 苏源; 孙兴春
Original assignee: NANTONG HAIZHOU CONSTRUCTION GROUP CO Ltd
Current assignee: NANTONG HAIZHOU CONSTRUCTION GROUP CO Ltd
Priority date: 2011-06-22
Filing date: 2011-06-22
Publication date: 2012-01-25
Anticipated expiration: 2021-06-22

Abstract

The utility model discloses a quick plugging device for a dewatering wellhead of a sand-free cement pipe deep well, which comprises a sand-free cement pipe and a steel sleeve. The steel sleeve comprises a steel pipe body, a flange, a plugging plate, a bolt, a rubber waterproof cushion and at least one water stop plate, wherein the sand-free cement pipe is embedded in a foundation concrete cushion layer; the bottom of the steel sleeve is inserted to the sand-free cement pipe; the flange is arranged on the top of the steel sleeve; the plugging plate is arranged above the flange; both the flange and the sealing plate are provided with at least three screw holes; the rubber waterproof cushion is arranged between the flange and the sealing plate; the flange and the sealing plate are firmly connected by the bolt; and the water stop plate is arranged on the outer lateral wall of the steel sleeve. The quick plugging device can carry out a one-step quick plugging process to avoid the difficult problem that water is seeped inside and outside the pipe well after the well is sealed.

Description

No sand cement pipe deep-well precipitation well head fast plugging device

Technical field

The utility model relates to precipitation well plugging device field, relates in particular to a kind of no sand cement pipe deep-well precipitation well head fast plugging device.

Background technology

In the middle of the process of the deep foundation pit precipitation well of basement in high rise building, underground garage and civil air defense constructions and installations excavation; Because the infiltration of underground water in soil, the phenomenon of quicksand and gush takes place through regular meeting, gush on cheating that subsoil will not stop along with excavation; Side slope also will constantly be caved in; So not only can influence the excavation construction of the earthwork, and will have influence on the safety of adjacent building, structure and foundation pit supporting construction, also can have influence on the normal construction and the workmanship of building foundation simultaneously.

Deep foundation pit precipitation well adopts no sand cement pipe deep-well precipitation usually at present; Obtained using widely in fields such as building, railway, culverts, deep foundation pit precipitation well has plurality of advantages such as precipitation has quick construction, displacement is big, precipitation is dark, drainage effect is good, well spacing is big.

Current deep foundation pit precipitation well is when its area is bigger, owing to receive the restriction of the precipitation depth and the precipitation radius of influence, deep foundation pit precipitation well must be embedded in the foundation ditch; But this moment, the shutoff of well head became a difficult problem, and the phenomenon of seepage often appears in conventional plugging device easily in the middle of the process of shutoff or after shutoff, take a lot of work during handling; And leak stopping is not thorough; And conventional plugging device can cause the cross-operation of work post, can influence the duration, and construction cost is high; Shutoff is got up also more difficult, is difficult to guarantee the quality and the effect of shutoff.

The utility model content

In order to solve the problem of above-mentioned existence, the purpose of the utility model is the no sand cement pipe deep-well precipitation well head fast plugging device that provides a kind of plugging effect simple in structure, disposable good.

To achieve these goals, the utility model adopts following technical scheme:

No sand cement pipe deep-well precipitation well head fast plugging device, comprising no sand cement pipe and steel sleeve, steel sleeve comprises that steel tube body, flange, shrouding, bolt, rubber waterproof pad are with seal plate at least; Said no sand cement pipe is embedded in the middle of the base concrete bed course; Insert in the no sand cement pipe bottom of said steel sleeve, and said flange is positioned at the top of steel sleeve, and said shrouding is positioned at the top of flange; Be equipped with at least three screws on said flange and the shrouding; Said rubber waterproof pad is between flange and shrouding, and through the firm connection of bolt, said seal plate is positioned on the lateral wall of steel sleeve between said flange and the shrouding.

Preferably, be equipped with 12 screws on said flange and the shrouding.

Preferably, the lateral wall of said steel sleeve is provided with the twice seal plate, is positioned at the last seal plate that is at steel sleeve middle part, is positioned at the following seal plate that is of steel sleeve bottom.

Preferably, said at steel sleeve with there is not filled polyurethane waterproof sealing cream between the sand cement pipe well mouth.

Preferably, fill waterproof cement mortar between said no sand cement pipe well mouth and the following seal plate.

Preferably, arc chord angle is made with cement mortar in said junction at no sand cement pipe and base concrete bed course, on arc chord angle, is provided with the SBS coil waterproof layer one, and the SBS coil waterproof layer joins with following seal plate, and interface adopts the hot melt sealing.

The utility model has the advantages that: insert in the no sand cement pipe in the steel sleeve; On the lateral wall of steel sleeve, be provided with at least one seal plate; Between steel sleeve, no sand cement pipe and base concrete bed course, adopt materials such as polyurethane sealant, SBS waterproof roll to carry out comprehensive waterproof, build harsh concrete in the inside of steel sleeve, top couples together with shrouding, rubber waterproof pad and flange; Carry out disposable quick blocking, stopped the difficult problem of the inside and outside infiltration of shut-in well back pipe well.

Description of drawings

Fig. 1 is the structural representation of the utility model;

The flow chart that Fig. 2 is to use the utility model to seal.

Among the figure 1, no sand cement pipe, 2, steel sleeve, 201, steel tube body, 202, flange; 203, shrouding, 204, bolt, 205, the rubber waterproof pad, 206, go up seal plate; 207, following seal plate, 3, waterproof sealing cream, 4, waterproof cement mortar, 5, the SBS coil waterproof layer.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail explanation.

Of Fig. 1 to 2, no sand cement pipe deep-well precipitation well head fast plugging device, it comprises no sand cement pipe 1 and steel sleeve 2; Steel sleeve comprises steel tube body 201, flange 201, shrouding 203, bolt 204, rubber waterproof pad 205 and twice seal plate, does not wherein have sand cement pipe 1 and is embedded in the middle of the base concrete bed course, and insert in the no sand cement pipe 1 bottom of steel sleeve 2; At steel sleeve 2 with there is not filled polyurethane waterproof sealing cream 3 between sand cement pipe 1 well head, flange 202 is positioned at the top of steel sleeve 2, and shrouding 203 is positioned at the top of flange 202; On flange 202 and shrouding 203, be equipped with 12 screws, be provided with rubber waterproof pad 205 between flange 202 and the shrouding 203, pass through bolt 204 firm connections between flange 202 and the shrouding 203; Seal plate is positioned on the lateral wall of steel sleeve 2; The road number of seal plate can be confirmed according to the height of steel sleeve, is the twice seal plate in the present embodiment, wherein is positioned at the last seal plate 206 that is at steel sleeve 2 middle parts; Be positioned at the following seal plate 207 that is of steel sleeve 2 bottoms; Fill waterproof cement mortar 4 between no sand cement pipe 1 well head and the following seal plate 207, make arc chord angle with cement mortar, on arc chord angle, be provided with SBS coil waterproof layer 5 one in the no sand cement pipe 1 and the junction of base concrete bed course; SBS coil waterproof layer 5 joins with following seal plate 207, and interface adopts the hot melt sealing.

Use no sand cement pipe deep-well precipitation well head fast plugging device; The flow process of whole shutoff is that the mouth of pipe is handled---the steel sleeve making---and steel sleeve is inserted fixing in advance---the sealing joint waterproof---foundation construction---stops precipitation---successively at interval, and fill out core and seal, wherein concrete steps are:

Step 1, the mouth of pipe are handled: laying base concrete bed course makes has certain intensity, makes that simultaneously no sand cement pipe 1 well head height is higher than base concrete bed course 220mm, and the external diameter of the no sand cement pipe 1 that uses in the present embodiment is 380mm, and internal diameter is 320mm;

Step 2, steel sleeve 2 are made: outside the hole, make circular steel sleeve pipe 2 on the ground, the external diameter of steel sleeve 2 is 300mm, and steel sleeve 2 wall thickness are 6.5mm; Welding twice seal plate is respectively seal plate 206 and following seal plate 207 on the lateral wall of circular steel sleeve pipe 2, and last seal plate 206 is positioned at 1/2 height of steel sleeve 2; Following seal plate 207 is positioned at apart from 300mm place, steel sleeve 2 lower end, and the thickness of seal plate is 4mm, and width is 100mm; At flange 202 of welded top of steel sleeve 2, the thickness of flange 202 is 10mm, and width is that 12 screws are set on the 70mm flange 202; Dispose 12 corresponding bolts 204, the diameter of screw is 14mm, at the top of steel sleeve 2 shrouding 203 is set; The thickness of shrouding 203 is 10mm, between shrouding 203 and flange 202, rubber waterproof pad 205 is set, and the thickness of rubber waterproof pad 205 is 6mm.；

Step 3, steel sleeve 2 inserted fixing in advance: before the sole plate assembling reinforcement, steel sleeve 2 is inserted in 1 mouthful of the no sand cement pipe, and in the bottom welded reinforcement support of seal plate 207 down, make down seal plate 207 be higher than no sand cement pipe 1 well head 80mm;

Step 4, sealing joint waterproof: at steel sleeve 2 with there is not between sand cement pipe 1 well head waterproof sealing of filling cream 3; Waterproof sealing cream 3 in the present embodiment adopts polyurethane water-proof sealing compound 3; After treating waterproof sealing cream 3 dryings, adopt waterproof cement mortar 4 will descend the 80mm fill plug seal between seal plate 207 and no sand cement pipe 1 well head, make arc chord angle with cement mortar in the no sand cement pipe 1 and the junction of base concrete bed course; The radius of arc chord angle is 5cm; On arc chord angle, do SBS coil waterproof layer 5 one, SBS coil waterproof layer 5 is accomplished to join with following seal plate 207 always, and interface adopts the hot melt sealing;

Step 5, foundation construction: colligation basis end placing of reinforcement; Break off at no sand cement pipe 1 well head place; Periphery is provided with reinforcing rib; Concreting around no sand cement pipe 1 well head, no sand cement pipe 1 well head top are that the back cast gate is kept somewhere at the center with the well head, after the well head quick blocking, adopt than the higher leveled expansive concrete teeming of circumferential concrete grade.

Step 6, at interval stop precipitation successively: stop precipitation should be a plurality of no sand cement pipe 1 precipitation wells at interval progressively stop precipitation; Individual well stops to take out water pump immediately behind the precipitation; The adverse effect that minimizing pressure of return water that like this can maximum efficiency produces, the effect of the sealing that also can guarantee simultaneously to shunt in a well;

Step 7, fill out core and seal: be backfilling into the height of concrete cushion in the no sand cement pipe 1 with fine sand, drop in the steel sleeve 2 vibration compacting again with the harsh concrete that is mixed with early strength admixture; And be poured into the top of steel sleeve 2 always, and on the flange 202 at steel sleeve 2 tops, place rubber waterproof pad 205 immediately, cover shrouding 203; With 12 bolts 204 shrouding 203 is fixed on the flange 202; Screwing force is used the top of expansive concrete teeming in steel sleeve 2 again apart from be 50N.m-60N.m, make it with do not have sand cement pipe 1 well head around concrete surface fair mutually; Vibration compacting, covering protection.

Construction is accomplished the back and is tackled SBS coil waterproof layer 5, steel sleeve 2 and do not have each positions such as sand cement pipe 1 junction surface, seal plate, shrouding 203 and check; Next step construction can be carried out in the passed examination rear; The utility model can conveniently carry out disposable quick blocking, has stopped the difficult problem of the inside and outside infiltration of shut-in well back pipe well.

The above only is the preferred implementation of the utility model; Should be pointed out that to those skilled in the art, under the prerequisite that does not break away from the utility model creation design; Can also make some similar distortion and improvement, these also should be regarded as within the protection domain of the utility model.

Claims

1. do not have sand cement pipe deep-well precipitation well head fast plugging device, it is characterized in that it comprises no sand cement pipe and steel sleeve; Steel sleeve comprises steel tube body, flange, shrouding, bolt, rubber waterproof pad with seal plate at least, and said no sand cement pipe is embedded in the middle of the base concrete bed course, and insert in the no sand cement pipe bottom of said steel sleeve; Said flange is positioned at the top of steel sleeve; Said shrouding is positioned at the top of flange, is equipped with at least three screws on said flange and the shrouding, and said rubber waterproof pad is between flange and shrouding; Through the firm connection of bolt, said seal plate is positioned on the lateral wall of steel sleeve between said flange and the shrouding.

2. no sand cement pipe deep-well precipitation well head fast plugging device according to claim 1 is characterized in that, is equipped with 12 screws on said flange and the shrouding.

3. no sand cement pipe deep-well precipitation well head fast plugging device according to claim 2 is characterized in that the lateral wall of said steel sleeve is provided with the twice seal plate, is positioned at the last seal plate that is at steel sleeve middle part, is positioned at the following seal plate that is of steel sleeve bottom.

4. no sand cement pipe deep-well precipitation well head fast plugging device according to claim 3 is characterized in that, and is said at steel sleeve with there is not filled polyurethane waterproof sealing cream between the sand cement pipe well mouth.

5. no sand cement pipe deep-well precipitation well head fast plugging device according to claim 4 is characterized in that, fills waterproof cement mortar between said no sand cement pipe well mouth and the following seal plate.

6. no sand cement pipe deep-well precipitation well head fast plugging device according to claim 5; It is characterized in that; Arc chord angle is made with cement mortar in said junction at no sand cement pipe and base concrete bed course; On arc chord angle, be provided with the SBS coil waterproof layer one, the SBS coil waterproof layer joins with following seal plate, and interface adopts the hot melt sealing.