CN102839691B - Quick sealing method and device for sandless cement pipe deep well dewatering wellhead - Google Patents
Quick sealing method and device for sandless cement pipe deep well dewatering wellhead Download PDFInfo
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- CN102839691B CN102839691B CN201110174983.7A CN201110174983A CN102839691B CN 102839691 B CN102839691 B CN 102839691B CN 201110174983 A CN201110174983 A CN 201110174983A CN 102839691 B CN102839691 B CN 102839691B
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Abstract
The invention discloses a quick sealing method and a device for a sandless cement pipe deep well dewatering wellhead. A prefabricated steel sleeve is inserted into a sandless cement pipe; at least one water stop plate is arranged on an outer side wall of the steel sleeve; materials such as polyurethane sealants and SBS (styrene-butadiene-styrene) waterproof coiled materials are adopted among the steel sleeve, the sandless cement pipe and a foundation concrete cushion for comprehensive water resistance; hard concrete is poured into the steel sleeve; and the upper part of the steel sleeve is connected by a sealing plate, a waterproof rubber mat and a flange for once quick sealing, so that the problem of water seepage inside and outside a pipe well after being sealed is avoided.
Description
Technical field
The present invention relates to plugging dewatering well technical field, particularly relate to a kind of without sand cement pipe dewatering well of deep well mouth rapid plugging method and device thereof.
Background technology
In the middle of the process that the deep foundation pit precipitation well of basement in high rise building, underground garage and civil air defense constructions and installations excavates; due to the infiltration of underground water in soil; often can there is the phenomenon of quicksand and gush; hole subsoil will along with excavation ceaselessly on gush; side slope also will constantly be caved in; so not only can affect the excavation construction of the earthwork, and will the safety of adjacent building, structure and foundation pit supporting construction be had influence on, also can have influence on normal construction and the workmanship of building foundation simultaneously.
Current deep foundation pit precipitation well adopts without sand cement pipe deep-well precipitation usually, be widely used in fields such as building, railway, culverts, deep foundation pit precipitation well has the plurality of advantages such as precipitation has quick construction, displacement is large, precipitation is dark, drainage effect is good, well spacing is large.
Current deep foundation pit precipitation well is when its area is larger, owing to being subject to the restriction of precipitation depth and Rainfall Influence radius, deep foundation pit precipitation well must be embedded in foundation ditch, but the now shutoff of well head becomes a difficult problem, the phenomenon of seepage is often easily there is in conventional sale monopoly method for blocking 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 the method for blocking of routine can cause the cross-operation of work post, duration can be affected, construction cost is high, shutoff is got up also more difficult, be difficult to the quality and the effect that ensure shutoff.
Summary of the invention
In order to solve above-mentioned Problems existing, the object of the present invention is to provide that a kind of technique is simple, speed of application is fast, the cycle is short, construction speed can not be affected, and disposable plugging effect good without sand cement pipe dewatering well of deep well mouth rapid plugging method and the method device used.
To achieve these goals, the present invention is by the following technical solutions:
Without sand cement pipe dewatering well of deep well mouth rapid plugging method, concrete steps are:
Step one, mouth of pipe process: lay base concrete bed course and make that there is some strength, make without sand cement pipe well open height higher than base concrete bed course simultaneously;
Step 2, steel sleeve make: on the lateral wall of circular steel jacketing, be welded with at least one seal plate, a flange is had in the welded top of steel sleeve, flange is arranged several screws, configure corresponding bolt, shrouding is set at the top of steel sleeve, rubber waterproof pad is set between shrouding and flange;
Step 3, steel sleeve are pre-inserted fixing: inserted steel sleeve without in the sand cement mouth of pipe before sole plate assembling reinforcement, and in the bottom welding reinforced bar support near one seal plate without the import of sand cement pipe, make this seal plate higher than without sand cement pipe well mouth;
Step 4, sealing joint waterproof: steel sleeve and without sand cement pipe well mouth between fill waterproof sealing cream, after the drying of waterproof sealing cream, adopt waterproof cement mortar by near one seal plate without the import of sand cement pipe and without fill plug seal between sand cement pipe well mouth, arc chord angle is made in the junction cement mortar without sand cement pipe and base concrete bed course, arc chord angle does one waterproofing course, waterproofing course with connect near seal plate together with the import of sand cement pipe, interface adopt hot-melting sealed;
Step 5, foundation construction: colligation basis end placing of reinforcement, disconnect without sand cement pipe well mouth place, periphery arranges reinforcing rib, without sand cement pipe well mouth surrounding concreting, without sand cement pipe well mouth top cast gate after indwelling centered by well head, after well head quick blocking, adopt expansive concrete teeming more higher leveled than circumferential concrete grade;
Step 6, successively interval stop precipitation: stop precipitation should be multiple without sand cement pipe dewatering well interval stopping precipitation progressively, individual well takes out water pump after stopping precipitation immediately;
Step 7, fill out core sealing: the height being backfilling into concrete cushion without sand cement Guan Zhongyong fine sand; drop in steel sleeve with the harsh concrete being mixed with early strength admixture again; vibration compacting; and be poured into the top of steel sleeve always; rubber waterproof pad is placed immediately on the flange at steel sleeve top; cover shrouding; with bolt, shrouding is fixed on flange; use expansive concrete teeming in the top of steel sleeve again; make it to maintain an equal level mutually with the concrete surface without sand cement pipe well mouth surrounding; vibration compacting, covering protection.
Preferably, the sealing compound in described step 4 adopts polyurethane water-proof sealing compound.
Preferably, the waterproofing course in described step 4 adopts SBS coil waterproof layer.
Without sand cement pipe dewatering well of deep well mouth fast plugging device, it comprises without sand cement pipe and steel sleeve, steel sleeve comprises steel tube body, flange, shrouding, bolt, rubber waterproof pad and twice seal plate, describedly be embedded in the middle of base concrete bed course without sand cement pipe, the bottom of described steel sleeve is inserted without in sand cement pipe, described flange is positioned at the top of steel sleeve, described shrouding is positioned at the top of flange, described flange and shrouding are equipped with at least three screws, described rubber waterproof pad is between flange and shrouding, by the firm connection of bolt between described flange and shrouding, described seal plate is positioned on the lateral wall of steel sleeve.The lateral wall of described steel sleeve is provided with twice seal plate, be positioned in the middle part of steel sleeve for upper seal plate, what be positioned at steel sleeve bottom is lower seal plate.Described steel sleeve and without filled polyurethane waterproof sealing cream between sand cement pipe well mouth.Describedly fill waterproof cement mortar without between sand cement pipe well mouth and lower seal plate.Describedly make arc chord angle in the junction cement mortar without sand cement pipe and base concrete bed course, arc chord angle is provided with one waterproofing course, and waterproofing course connects with lower seal plate, and interface adopts hot-melting sealed.
Advantage of the present invention is: the steel sleeve made in advance without insertion in sand cement pipe, the lateral wall of steel sleeve is provided with at least one seal plate, at steel sleeve, without adopting the material such as polyurethane sealant, SBS coiled material to carry out comprehensive waterproof between sand cement pipe and base concrete bed course, harsh concrete is built in the inside of steel sleeve, top shrouding, rubber waterproof pad and Flange joint get up, carry out disposable quick blocking, stop a difficult problem for the inside and outside infiltration of pipe well after shunting in a well.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of method in the present invention;
Fig. 2 is the structural representation of device in the present invention.
In figure 1, without sand cement pipe, 2, steel sleeve, 201, steel tube body, 202, flange, 203, shrouding, 204, bolt, 205, rubber waterproof pad, 206, upper seal plate, 207, lower seal plate, 3, waterproof sealing cream, 4, waterproof cement mortar, 5, SBS coil waterproof layer.
Detailed description of the invention
Below in conjunction with drawings and the specific embodiments the present invention is described in further detail explanation.
As described in Fig. 1 to 2, without sand cement pipe dewatering well of deep well mouth rapid plugging method, the flow process of whole method is mouth of pipe process---steel sleeve making---and steel sleeve is pre-inserted fixing---sealing joint waterproof---core sealing is filled out in foundation construction---interval stops precipitation successively---, and wherein concrete steps are:
Step one, mouth of pipe process: lay base concrete bed course and make to have some strength, make without sand cement pipe 1 well head height higher than base concrete bed course 220mm, the external diameter without sand cement pipe 1 used in the present embodiment is 380mm, and internal diameter is 320mm simultaneously;
Step 2, steel sleeve 2 makes: on outer ground, hole, make circular steel jacketing 2, the external diameter of steel sleeve 2 is 300mm, steel sleeve 2 wall thickness is 6.5mm, the lateral wall of circular steel jacketing 2 welds twice steel plate for sealing water, be respectively seal plate 206 and lower seal plate 207, upper seal plate 206 is positioned at 1/2 height of steel sleeve 2, lower seal plate 207 is positioned at apart from 300mm place, steel sleeve 2 lower end, the thickness of seal plate is 4mm, width is 100mm, at welded top flange 202 of steel sleeve 2, the thickness of flange 202 is 10mm, width is 70mm flange 202 is arranged 12 screws, configure 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, rubber waterproof pad 205 is set between shrouding 203 and flange 202, the thickness of rubber waterproof pad 205 is 6mm.；
Step 3, steel sleeve 2 are pre-inserted fixing: inserted by steel sleeve 2 without in sand cement pipe 1 mouthful before sole plate assembling reinforcement, and in the bottom welding reinforced bar support of lower seal plate 207, make lower seal plate 207 higher than without sand cement pipe 1 well head 80mm;
Step 4, sealing joint waterproof: steel sleeve 2 and without sand cement pipe 1 well head between fill waterproof sealing cream 3, waterproof sealing cream 3 in the present embodiment adopts polyurethane water-proof sealing compound 3, after waterproof sealing cream 3 drying, adopt waterproof cement mortar 4 by lower seal plate 207 and without the 80mm fill plug seal between sand cement pipe 1 well head, arc chord angle is being made without sand cement pipe 1 and the junction cement mortar of base concrete bed course, the radius of arc chord angle is 5cm, arc chord angle does one SBS coil waterproof layer 5, SBS coil waterproof layer 5 is accomplished to connect with lower seal plate 207 always, interface adopts hot-melting sealed,
Step 5, foundation construction: colligation basis end placing of reinforcement, disconnect without sand cement pipe 1 well head place, periphery arranges reinforcing rib, without sand cement pipe 1 well head surrounding concreting, without sand cement pipe 1 well head top cast gate after indwelling centered by well head, after well head quick blocking, adopt expansive concrete teeming more higher leveled than circumferential concrete grade;
Step 6, successively interval stop precipitation: stop precipitation should be multiple without sand cement pipe 1 dewatering well interval stopping precipitation progressively, individual well takes out water pump after stopping precipitation immediately, like this can the adverse effect that produces of the minimizing pressure of return water of maximum efficiency, the effect of the sealing that simultaneously also can ensure to shunt in a well;
Step 7, fill out core sealing: without the height being backfilling into concrete cushion in sand cement pipe 1 with fine sand, drop in steel sleeve 2 with the harsh concrete being mixed with early strength admixture again, vibration compacting, and be poured into the top of steel sleeve 2 always, rubber waterproof pad 205 is placed immediately on the flange 202 at steel sleeve 2 top, cover shrouding 203, with 12 bolts 204, shrouding 203 is fixed on flange 202, screwing force distance is 50N.m-60N.m, use expansive concrete teeming in the top of steel sleeve 2 again, make to maintain an equal level with reinforcing rib foreign minister in reinforcing rib.
To construct rear reply waterproofing course, steel sleeve and carry out checking without positions such as sand cement pipe junction surface, seal plate, shroudings and next step construction can be carried out in qualified rear.
The present invention without the device used in sand cement pipe dewatering well of deep well mouth rapid plugging method is, a kind of without sand cement pipe dewatering well of deep well mouth fast plugging device, it comprises without sand cement pipe 1 and steel sleeve 2, steel sleeve comprises steel tube body 201, flange 202, shrouding 203, bolt 204, rubber waterproof pad 205 and twice seal plate, wherein be embedded in the middle of base concrete bed course without sand cement pipe 1, the bottom of steel sleeve 2 is inserted without in sand cement pipe 1, steel sleeve 2 and without sand cement pipe 1 well head between filled polyurethane waterproof sealing cream 3, flange 202 is positioned at the top of steel sleeve 2, shrouding 203 is positioned at the top of flange 202, flange 202 and shrouding 203 are equipped with 12 screws, rubber waterproof pad 205 is provided with between flange 202 and shrouding 203, by the firm connection of bolt 204 between flange 202 and shrouding 203, seal plate is positioned on the lateral wall of steel sleeve 2, the number of channels of seal plate can be determined according to the height of steel sleeve, it is twice seal plate in the present embodiment, wherein be positioned in the middle part of steel sleeve 2 for upper seal plate 206, what be positioned at steel sleeve 2 bottom is lower seal plate 207, waterproof cement mortar 4 is filled without between sand cement pipe 1 well head and lower seal plate 207, arc chord angle is being made without sand cement pipe 1 and the junction cement mortar of base concrete bed course, arc chord angle is provided with one SBS coil waterproof layer 5, SBS coil waterproof layer 5 connects with lower seal plate 207, interface adopts hot-melting sealed.
The above is only the preferred embodiment of the present invention; it should be pointed out that to those skilled in the art, without departing from the concept of the premise of the invention; can also make some similar distortion and improvement, these also should be considered as within protection scope of the present invention.
Claims (4)
1., without sand cement pipe dewatering well of deep well mouth rapid plugging method, it is characterized in that, concrete steps are:
Step one, mouth of pipe process: lay base concrete bed course and make that there is some strength, make without sand cement pipe well open height higher than base concrete bed course simultaneously;
Step 2, steel sleeve make: on the lateral wall of circular steel jacketing, be welded with at least one seal plate, a flange is had in the welded top of steel sleeve, flange is arranged several screws, configure corresponding bolt, shrouding is set at the top of steel sleeve, rubber waterproof pad is set between shrouding and flange;
Step 3, steel sleeve are pre-inserted fixing: inserted steel sleeve without in the sand cement mouth of pipe before sole plate assembling reinforcement, and in the bottom welding reinforced bar support near one seal plate without the import of sand cement pipe, make this seal plate higher than without sand cement pipe well mouth;
Step 4, sealing joint waterproof: steel sleeve and without sand cement pipe well mouth between fill waterproof sealing cream, after the drying of waterproof sealing cream, adopt waterproof cement mortar by near one seal plate without the import of sand cement pipe and without fill plug seal between sand cement pipe well mouth, arc chord angle is made in the junction cement mortar without sand cement pipe and base concrete bed course, arc chord angle does one waterproofing course, waterproofing course with connect near seal plate together with the import of sand cement pipe, interface adopt hot-melting sealed;
Step 5, foundation construction: colligation basis end placing of reinforcement, disconnect without sand cement pipe well mouth place, periphery arranges reinforcing rib, without sand cement pipe well mouth surrounding concreting, without sand cement pipe well mouth top cast gate after indwelling centered by well head, after well head quick blocking, adopt expansive concrete teeming more higher leveled than circumferential concrete grade;
Step 6, successively interval stop precipitation: stop precipitation should be multiple without sand cement pipe dewatering well interval stopping precipitation progressively, individual well takes out water pump after stopping precipitation immediately;
Step 7, fill out core sealing: the height being backfilling into concrete cushion without sand cement Guan Zhongyong fine sand; drop in steel sleeve with the harsh concrete being mixed with early strength admixture again; vibration compacting; and be poured into the top of steel sleeve always; rubber waterproof pad is placed immediately on the flange at steel sleeve top; cover shrouding; with bolt, shrouding is fixed on flange; use expansive concrete teeming in the top of steel sleeve again; make it to maintain an equal level mutually with the concrete surface without sand cement pipe well mouth surrounding; vibration compacting, covering protection.
2. according to claim 1ly it is characterized in that without sand cement pipe dewatering well of deep well mouth rapid plugging method, the waterproof sealing cream in described step 4 adopts polyurethane water-proof sealing compound.
3. according to claim 1ly it is characterized in that without sand cement pipe dewatering well of deep well mouth rapid plugging method, the waterproofing course in described step 4 adopts SBS coil waterproof layer.
4. without sand cement pipe dewatering well of deep well mouth fast plugging device, it is characterized in that, it comprises without sand cement pipe and steel sleeve, steel sleeve comprises steel tube body, flange, shrouding, bolt, rubber waterproof pad and twice seal plate, describedly be embedded in the middle of base concrete bed course without sand cement pipe, the bottom of described steel sleeve is inserted without in sand cement pipe, described flange is positioned at the top of steel sleeve, described shrouding is positioned at the top of flange, described flange and shrouding are equipped with at least three screws, described rubber waterproof pad is between flange and shrouding, by the firm connection of bolt between described flange and shrouding, described seal plate is positioned on the lateral wall of steel sleeve, the lateral wall of described steel sleeve is provided with twice seal plate, be positioned in the middle part of steel sleeve for upper seal plate, what be positioned at steel sleeve bottom is lower seal plate, described steel sleeve and without filled polyurethane waterproof sealing cream between sand cement pipe well mouth, describedly fill waterproof cement mortar without between sand cement pipe well mouth and lower seal plate, make arc chord angle in the described junction cement mortar without sand cement pipe and base concrete bed course, arc chord angle is provided with one waterproofing course, waterproofing course connects with lower seal plate, and interface adopts hot-melting sealed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110174983.7A CN102839691B (en) | 2011-06-22 | 2011-06-22 | Quick sealing method and device for sandless cement pipe deep well dewatering wellhead |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110174983.7A CN102839691B (en) | 2011-06-22 | 2011-06-22 | Quick sealing method and device for sandless cement pipe deep well dewatering wellhead |
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| CN102839691A CN102839691A (en) | 2012-12-26 |
| CN102839691B true CN102839691B (en) | 2015-04-15 |
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| CN103898920B (en) * | 2012-12-27 | 2016-05-04 | 上海建工七建集团有限公司 | Foundation ditch falls, water discharge method |
| CN103362145A (en) * | 2013-08-02 | 2013-10-23 | 江苏正方园建设集团有限公司 | Steel sleeve for basement tube well plugging |
| CN104563144A (en) * | 2014-12-04 | 2015-04-29 | 成都迅德科技有限公司 | Plugging structure |
| WO2018214143A1 (en) * | 2017-05-26 | 2018-11-29 | 南通八建集团有限公司 | Construction method for plugging dewatering well having penetrating bottom plate in foundation pit |
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| CN111119249B (en) * | 2020-01-10 | 2025-01-21 | 中国建筑第八工程局有限公司 | Tower crane pre-embedded section waterproof device penetrating bottom plate and construction method thereof |
| CN111441374B (en) * | 2020-01-14 | 2021-09-10 | 中建六局建设发展有限公司 | Quick plugging construction method for high-water-pressure deep foundation pit dewatering well |
| CN116537238A (en) * | 2023-07-04 | 2023-08-04 | 北京建工集团有限责任公司 | Plugging method for dry well under water-carrying operation environment |
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