CN207904943U - Well-sealing device for superelevation floor height hydraulic pressure dewatering well of deep well - Google Patents

Abstract

The utility model discloses a kind of well-sealing devices for superelevation floor height hydraulic pressure dewatering well of deep well, including the immersible pump being placed in dewatering well, it further include water shutoff plate, the pumping rate of immersible pump is more than the climbing speed of water level in dewatering well, water shutoff plate seamless welding is welded with Grouting Pipe, casing and drainpipe in dewatering well on water shutoff plate, and control valve is mounted in the upper end of Grouting Pipe and drainpipe, it is threaded with water shutoff block in cannula tip, concrete layer has been poured on water shutoff plate.The immersible pump that the utility model selects pumping rate to be more than rate of rise in dewatering well draws water, welding procedure can be carried out to water shutoff plate while drawing water, the requirement that water shutoff plate is welded in well can be met, can be carried out above water shutoff plate according to actual needs plus road blocks, applicability is stronger；It can avoid construction object again to fly out under the impact of high pressure water dewatering well, injure staff by a crashing object, security performance is more preferable, and shut-in well quality is high, shut-in well excellent in efficiency, durable.

Description

Well-sealing device for superelevation floor height hydraulic pressure dewatering well of deep well

Technical field

The utility model is related to a kind of well-filling techniques fields of dewatering well of deep well, more particularly to one kind being used for superelevation floor height water Press the well-sealing device of dewatering well of deep well.

Background technology

With the development of urban construction, building basement depth is continuously increased, and foundation pit is just increasingly deeper, to base pit dewatering It is required that also higher and higher, less than requiring, foundation pit is easy for occurring dangerous water level drop.And dewatering well is exactly to be beaten for lowering of watertable Well, water pump groundwater abstraction is put into after having beaten, reduces the water level of underground water, be ensure foundation pit smooth construction common measure it One.But for superelevation floor height hydraulic pressure dewatering well of deep well, because dewatering well bore is big, water level is high, water gushes phenomena such as speed is fast In the presence of closure difficulty is huge.

It is effectively blocked to solve the above problems, realizing, conventional method is：First the water in dewatering well is discharged with immersible pump, Reach setting value to precipitation waterline；Then, immersible pump is closed and abandoned, is rapidly injected into dewatering well by water glass adhesive, profit Gradually blocked with the rapid hardening of the water glass adhesive, reduce dewatering well drain bore to bore be zero；Finally, it is welded in dewatering well well head Water shutoff cover board is connect, completes to block.

Though above structure can efficiently solve the closure problem of superelevation floor height hydraulic pressure dewatering well of deep well, asked there are following Topic：

1, water glass adhesive effect rapid hardening waterproofing agent is relied primarily on to stop gushing out for high pressure water, and rate of set must be very Soon, generally a few minutes, thus while being used on building site must accomplish to match and use, efficient site operation speed is needed, to working The requirement of personnel is high.

2, while water glass adhesive condenses, water level in dewatering well still can quick high-pressure rise, water glass adhesive is rushed It is huge to hit dynamics, causes water glass adhesive division isolation to be splashed to staff, security risk is big.

3, under the impact of high pressure water level, the condensation shape of water glass adhesive is the thin inverted concave in both sides thickness center, works as top When the welding of water shutoff cover board does not have gap entirely, the high pressure water in dewatering well can not be in static state, can gradually hit water glass adhesive Weakness, less serious case's infiltration, severe one washes water shutoff cover board water burst open, since water glass adhesive and water shutoff cover board have been placed on dewatering well well Mouthful, road can not be added to block again above, substantially belong to a construction operation, it is poor to block durability for the possibility that do not remedy.

4, for common cement mortar, the environmental-protecting performance of water glass adhesive is low, price higher.

Utility model content

The purpose of this utility model is to provide a kind of at low cost, durable, energy-saving and environment friendly, use easy for construction In the well-sealing device of superelevation floor height hydraulic pressure dewatering well of deep well.

This well-sealing device for superelevation floor height hydraulic pressure dewatering well of deep well provided by the utility model, including it is placed in precipitation Immersible pump in well further includes water shutoff plate, and the pumping rate of the immersible pump is more than the climbing speed of water level in dewatering well, described Water shutoff plate seamless welding is welded with Grouting Pipe, casing and drainpipe in dewatering well on water shutoff plate, in the Grouting Pipe and row The upper end of water pipe is mounted on control valve, is connected with water shutoff block in described sleeve pipe screw top, is poured on the water shutoff plate There is concrete layer.

For the durability of raising water shutoff plate, it is painted with flexible waterproof coating layer between the water shutoff plate and concrete layer, The concrete layer uses the impervious pea gravel concreten of microdilatancy.

For convenience of practicality, it is equipped in described sleeve pipe for hanging the hook of pumping conduit and cable on immersible pump.

To ensure water sealing effect, circumferentially uniform welding has several triangles between the water shutoff plate and the inner wall of dewatering well Stiffener.

To improve plugging dewatering well overall durability, the purpose of zero leakage, the dewatering well above the concrete are realized Inside at least there are two seal plates for seamless welding.

To ensure water sealing effect, closure block is threaded at the top of the Grouting Pipe and drainpipe.

Compared with prior art, the utility model has the following advantages：

1, the immersible pump for selecting pumping rate to be more than rate of rise in dewatering well draws water, can be while drawing water Welding procedure is carried out to water shutoff plate, you can meet the requirement that water shutoff plate is welded in well, it can be according to actual needs on water shutoff plate Fang Jinhang, which adds, to be blocked, and applicability is stronger；It can avoid construction object again to fly out under the impact of high pressure water dewatering well, injure work people by a crashing object Member, security performance are more preferable.

2, water shutoff plate is welded in dewatering well, casting concrete is shunt in a well on water shutoff plate, be conventional form of construction work, Particular production at the construction field (site) is not needed, efficient site operation speed is not needed, environmental-protecting performance is high, price is low, to the people that works The requirement of member is low.

3, after water shutoff plate is completed in welding, Grouting Pipe, casing and drainpipe can be immediately closed, makes that Static Water is presented in well, with Hydraulic pressure increases, and examines weldquality, it is ensured that does not occur leakage scenarios and carries out high-pressure slip-casting again, ensures the durable of water shutoff plate.

The utility model is simple in structure, easy to operate, and shut-in well quality is high, excellent in efficiency of shunting in a well, at low cost, green energy conservation of shunting in a well Environmental protection.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model.

Fig. 2 is schematic cross-sectional view at A-A in Fig. 1.

Fig. 3 is the structural schematic diagram after the utility model shut-in well.

Label and corresponding component name shown in figure are：

1, dewatering well；2, water shutoff plate；3, Grouting Pipe；4, casing；5, drainpipe；6, control valve；7, water shutoff block；8, coagulation Soil layer；9, flexible waterproof coating layer；10, it links up with；11, triangle stiffener；12, seal plate；13, block is blocked；14, drinking-water pipe Road；15, cable.

Specific implementation mode

Can be seen that from Fig. 1 to Fig. 3 the utility model additionally provide it is a kind of for superelevation floor height hydraulic pressure dewatering well of deep well Well-sealing device, including water shutoff plate 2, Grouting Pipe 3, casing 4 and drainpipe 5,2 seamless welding of water shutoff plate on the inner wall of dewatering well 1, It is opened on water shutoff plate 2 there are three through-hole corresponding with Grouting Pipe 3, casing 4 and drainpipe 5, Grouting Pipe 3 is through corresponding through-hole And docked above water shutoff plate 2 and with corresponding through-hole with 2 seamless welding of water shutoff plate, casing 4 and 5 seamless welding of drainpipe, The upper end of Grouting Pipe 3 and drainpipe 5 is mounted on a control valve 6, is connected with a water shutoff block 7 in 4 screw top of casing, is sealing 2 top of water plate is painted with flexible waterproof coating layer 9, and the coagulation of the impervious microlith of microdilatancy is filled on the flexible waterproof coating layer Soil layer 8.

It can also be seen that from Fig. 1 to Fig. 3 and carry out pumping action, drop using same immersible pump for convenience of when weld seam seeps water Low cost is equipped in the utility model casing 4 for hanging the hook 10 of pumping conduit 14 and cable 15 on immersible pump.

It can also be seen that from Fig. 1 to Fig. 3 between water shutoff plate 2 and the inner wall of dewatering well 1 along the circumferential uniform of dewatering well 1 Several triangle stiffeners 11 are welded with, is threaded in Grouting Pipe 3 and 5 top of drainpipe and blocks block 13.

It is can also be seen that from Fig. 1 and Fig. 2 to prevent the water shutoff plate as first of water stopping function because the construction time is long, old Subtle infiltration caused by changing improves plugging dewatering well overall durability, the purpose of zero leakage of dewatering well position is realized, in concrete At least there are two seal plates 12 for seamless welding in the dewatering well 1 of 8 top of layer.

In the present invention, water shutoff plate 2 and seal plate 12 are made of 6mm steel plates, and Grouting Pipe 3 is by 3mm wall thickness DN25 coating steel pipes are made, and casing 4 is made of the DN150 coating steel pipes of 3mm wall thickness, and drainpipe 5 is zinc-plated by the DN15 of 3mm wall thickness Steel pipe is made, and there are two control valves 6 and the pipe well copper ball valve of respectively DN25 and DN15, and diving pump lift is not less than 50 meters, three Angle stiffener 11 is made of 10mm steel plates.

The shut-in procedures that superelevation floor height hydraulic pressure dewatering well of deep well is carried out using the utility model are as follows：

1, preparation of construction：

A, material, equipment prepare：

Electric welding machine one；Oxygen-acetylene gas cutting machine, pump drainage wind turbine one；

B, personnel prepare：

Professional electrician one, electric welder one, auxiliary welder one, construction manager one, security official one；

2, by 1 internal diameter scene actual quantities size of dewatering well, molding is cut to size in water shutoff plate 2, layout position is pressed on water shutoff plate 2 It sets and opens hole and antiseptic and rustproof processing is carried out to it；By the coating steel pipe of the DN25 of 3mm wall thickness, 150,15, length is distinguished as requested It is welded on 2 corresponding position of water shutoff plate and forms Grouting Pipe 3, casing 4 and drainpipe 5, control is installed in Grouting Pipe 3 and drainpipe 5 Valve 6, the welding hook 10 in casing 4, all weld seams use carbon dioxide gas arc welding by professional welder, it is ensured that weld seam is full It is full；

3, water shutoff plate 2 is sleeved on the suction hose 14 of immersible pump by casing 4, which is put into dewatering well 1 Operation of drawing water inside is carried out, and ensures that the pumping rate of immersible pump is more than the climbing speed of water level in dewatering well；

4, when water level line in dewatering well drops at well head at least 450mm, operation drop of drawing water is carried out in immersible pump While low water level, first weld steel sleeve is dried up using hair dryer, then the water shutoff plate 2 made in above-mentioned steps 2 is passed through The mode of seamless welding is welded in dewatering well 1 at 260~330mm of well head, wherein it is required that 3 mouthfuls of distances from bottom of Grouting Pipe Shaft bottom 500mm or so is normally at deeper subsurface room in view of pad, and space is smaller, need to use two air blast machine operations, one Air-supply, it is ensured that weld fresh air supplies, an air draft, it is ensured that the gas generated when welding arranges in time, avoids Welder People sucks the exhaust gas that welding generates；

5, after weld seam cooling, immersible pump is closed, the suction hose 14 of immersible pump and cable 15 are fetched and are placed on extension It is spare on hook 10, two control valve 6 of quick closedown and the water shutoff block 7 on casing 4 is screwed to block Grouting Pipe 3,5 and of drainpipe Whether casing 4, observation commissure seep water；

6, it as seeped water, removes water shutoff block 7 and opens casing 4, take out the suction hose 14 and cable 15 in casing 4, open It opens immersible pump and continues operation of drawing water, and repair welding processing is carried out in infiltration position, repeat above-mentioned steps 5；It is first right if impermeable Antiseptic and rustproof processing is done in casing 4 and water shutoff block 7, and the DN25 of the direct connector of band of a 3mm wall thickness is threadedly coupled on drainpipe 5 Zinc-plated drainpipe, then the control valve 6 opened in Grouting Pipe 3 carry out high-pressure slip-casting into dewatering well 1, and open on drainpipe 5 Control valve 6 drains dewatering well 1；

7, until after thick cement mortar of emerging in drainpipe 5, test block first is made to the thick cement mortar sampling emerged and is closed The control valve 6 closed on drainpipe 5 blocks drainpipe 5, while the pressure value set to slip casting machine by 3 voltage stabilizing slip casting of Grouting Pipe, Turn off control valve 6 in Grouting Pipe 3 and block Grouting Pipe 3, by test block use in dewatering well thick cement slurry sets it is same Condition is conserved；

8, after test block reaches setting intensity, the control valve 6 being again turned on drainpipe 5, if after not occurring percolating water again It closes the control valve and blocks drainpipe 5；If there are percolating water, sealed by 3 high-pressure injection polyurethane grouting material of Grouting Pipe After stifled processing, turns off two control valves 6 and block drainpipe 5 and Grouting Pipe 3；Finally envelope is covered above Grouting Pipe 3 and drainpipe 5 Blanking cover cap 13, brushing flexible waterproof coating layer 9 carries out totally-enclosed processing on water shutoff plate 2, then is poured on flexible waterproof coating layer 9 The concrete layer 8 for building the impervious microlith of microdilatancy is shunt in a well；

9, at the well head 100mm apart from dewatering well 1, at 50mm between the upper and lower every 2 pieces of complete seal plates of seamless welding 12。

Claims (6)

1. a kind of well-sealing device for superelevation floor height hydraulic pressure dewatering well of deep well, including it is placed in dewatering well（1）Interior immersible pump, It is characterized in that：It further include water shutoff plate（2）, the pumping rate of the immersible pump is more than the climbing speed of water level in dewatering well, described Water shutoff plate seamless welding is welded with Grouting Pipe in dewatering well on water shutoff plate（3）, casing（4）And drainpipe（5）, described The upper end of Grouting Pipe and drainpipe is mounted on control valve（6）, water shutoff block is connected in described sleeve pipe screw top（7）, Concrete layer has been poured on the water shutoff plate（8）.

2. the well-sealing device according to claim 1 for superelevation floor height hydraulic pressure dewatering well of deep well, it is characterised in that：Institute It states and is painted with flexible waterproof coating layer between water shutoff plate and concrete layer（9）, the concrete layer is using the impervious microlith of microdilatancy Concrete.

3. the well-sealing device according to claim 1 for superelevation floor height hydraulic pressure dewatering well of deep well, it is characterised in that：Institute It states in casing and is equipped with for hanging the hook of pumping conduit and cable on immersible pump（10）.

4. the well-sealing device according to claim 1 for superelevation floor height hydraulic pressure dewatering well of deep well, it is characterised in that：Institute State between water shutoff plate and the inner wall of dewatering well that circumferentially uniform welding there are several triangle stiffeners（11）.

5. the well-sealing device according to claim 1 for superelevation floor height hydraulic pressure dewatering well of deep well, it is characterised in that：Institute Stating in the dewatering well above concrete at least seamless welding, there are two seal plates（12）.

6. the well-sealing device according to claim 1 for superelevation floor height hydraulic pressure dewatering well of deep well, it is characterised in that：Institute It states and is threaded with closure block at the top of Grouting Pipe and drainpipe（13）.