CN103174154A - A method and auxiliary dewatering device for solidly sealing underground building floor water gushing well pits - Google Patents

Abstract

The invention discloses a method for sealing a water burst well pit of an underground building bottom plate, which comprises the following steps: (1) preparing an auxiliary dewatering device; (2) digging a pit on the base surface of a water burst well pit to be sealed by pouring concrete on a bottom plate of an underground building; (3) vertically fixing a steel structure sleeve in the pit; (4) draining accumulated water by using a submersible pump, pouring concrete at the same time, and enabling the submersible pump to work until the concrete poured into the water gushing well pit enters an initial setting stage; (5) after the concrete poured in the water burst well pit enters the initial setting stage, the submersible pump is suspended for pumping and draining water, and the concrete is allowed to be gelled and hardened under the condition of water soaking; (6) after the strength of the concrete reaches 60%, starting a submersible pump to pump and drain water, and anchoring a steel structure cover plate to be installed on a steel structure sleeve when the water level of a water burst well pit is reduced; (7) and (5) arranging a steel bar net outside the upper top of the auxiliary precipitation device, and then pouring concrete. The invention also discloses an auxiliary precipitation device for implementing the method.

Description

A method and auxiliary dewatering device for solidly sealing underground building floor water gushing well pits

technical field

The invention relates to the technical field of construction engineering, in particular to a method for solidly sealing a water gushing pit on an underground building floor, and an auxiliary dewatering device for implementing the method.

Background technique

Technicians in the technical field of construction engineering know that no matter the strength or density of ordinary concrete poured on the part where water gushes out continuously, it cannot be guaranteed. However, the floor of the basement, especially the floor of the elevator shaft, the post-cast belt, the foundation of the tower crane and other areas below the groundwater level, often has water gushing when the concrete is poured. The routine way of existing technology mainly puts into the mode dewatering of submersible pump at the bottom of its well pit. Although this move can play a certain role, it still has not fundamentally solved the actual problem.

Therefore, there is an urgent need to introduce corresponding methods to ensure the quality of the concrete structure poured at the water gushing part.

Contents of the invention

In order to solve the above-mentioned problems, the method disclosed by the present invention is a method for sealing the water gushing pit of the underground building floor, which not only greatly facilitates the construction, but also ensures that the newly poured concrete can be gelled and hardened smoothly. Therefore, it is effectively ensured that the structure poured at the water gushing part can meet the safety requirements; the invention also discloses an auxiliary dewatering device for implementing the method for solidly sealing the water gushing pit of the bottom plate of the underground building.

The technical scheme that the present invention adopts for realizing the above object is:

A method for solidly sealing a well pit for water gushing in an underground building floor, is characterized in that it comprises the following steps:

(1) Prepare an auxiliary dewatering device, which includes a steel structure cover plate and a steel structure sleeve;

(2) Dig a pit on the base surface of the water gushing well that will be poured with concrete to seal the floor of the underground building;

(3) The reinforcement in the bottom plate is extended to the pit of the water gushing well, the steel structure sleeve is vertically placed in the water gushing well pit, and the reinforcement and the steel structure sleeve are fixed;

(4) Put a submersible pump and supporting water pipes into the steel structure sleeve to the bottom of the water gushing well pit, discharge the accumulated water in the water gushing well pit through the submersible pump, and pour concrete in the water gushing well pit and the periphery of the steel structure sleeve, The submersible pump has been working until the concrete poured into the water gushing pit enters the initial setting period, so as to ensure that the concrete poured into the gushing well pit is convenient for construction to be compacted and enters the initial setting period smoothly;

(5) After the concrete poured in the water gushing pit enters the initial setting period, the submersible pump is suspended to drain the water, so that the concrete is gelled and hardened under the condition of soaking water;

(6) When the strength of the concrete described in step (5) reaches 60%, start the submersible pump to pump and drain water. When the water level in the gushing pit is lowered, pull out the submersible pump and supporting water pipes, and cover the steel structure of the auxiliary dewatering device in time. The plate is anchored to the steel sleeve installed in the gushing pit;

(7) Lay reinforcement mesh on the top and outside of the auxiliary dewatering device of the gushing well pit, and then pour concrete until it is flush with the surface of the gushing well.

As a further improvement of the present invention, the step (2) specifically also includes the following content, the pit of the water gushing pit is not less than 100mm lower than the base surface, and the diameter is equal to or greater than the inner diameter of the steel casing; The step (3) specifically includes the following content, the steel structure sleeve is fixed at a position not less than 50 mm below the surface of the water gushing pit.

As a further improvement of the present invention, the length of the steel cylinder at the lower part of the steel structure sleeve is not less than 100 mm; at least one rubber waterstop is provided on the outer wall of the steel structure sleeve; a surface layer is provided inside the bottom plate For reinforcement and bottom reinforcement, the outer wall of the steel structure sleeve is welded with steel bars or steel structure hooks connected with the inner surface layer of the water gushing pit and the bottom reinforcement respectively.

As a further improvement of the present invention, the steel structure cover plate is fixed on the steel structure sleeve with 4 or more sets of anchor bolts; at least one elastic sealant is provided between the steel structure cover plate and the steel structure sleeve or sealing ring.

As a further improvement of the present invention, the steel structure cover plate is provided with a valve or a plug.

As a further improvement of the present invention, the step (6) specifically includes the following content. When the steel structure cover is anchored to the steel structure sleeve of the water gushing pit under the condition of water pressure, install it on the steel structure cover The valve or plug is in an open state to reduce the water pressure acting on the steel structure cover plate, so that the steel structure cover plate and the steel structure sleeve can be anchored in place smoothly, and meet the waterproof and solid sealing requirements.

As a further improvement of the present invention, the bottom of the steel structure sleeve is provided with a grill structure to prevent the submersible pump from being blocked.

An auxiliary dewatering device implementing the above method is characterized in that it includes a steel structure cover plate and a steel structure sleeve, and at least one elastic sealant or sealing rubber ring is arranged between the steel structure cover plate and the steel structure sleeve. The steel structure cover plate is fixed on the steel structure sleeve with 4 or more sets of anchor bolts; steel bars or steel structure hooks are welded on the outer wall of the steel structure sleeve, and the outer wall of the steel structure sleeve is provided with There is at least one rubber waterstop.

As a further improvement of the present invention, the steel structure sleeve, the steel structure cover plate and the anchor bolt are stainless steel materials resistant to acid and alkali corrosion, and a steel cylinder with a length of not less than 100 mm is provided at the lower part of the steel structure sleeve; The steel structure cover plate is provided with a valve or a plug.

As a further improvement of the present invention, the bottom of the steel structure sleeve is provided with a grill structure to prevent the submersible pump from being blocked.

Beneficial effects of the present invention: in the construction of underground buildings, firstly dig out a water gushing well pit, put in a special auxiliary dewatering device and submersible pump, and pour concrete around the auxiliary dewatering device during the pumping process of the submersible pump, and the submersible pump will work At the same time that the concrete enters the initial setting period, stop the submersible pump to drain water, let the concrete gel and harden under the condition of soaking in water; the submersible pump stops pumping water, and when the hardness of the concrete reaches 60%, the submersible pump pumps water again, when the water level drops to a certain level Finally, take out the submersible pump, anchor the steel steel structure cover plate in the auxiliary dewatering device on the steel sleeve, tie a steel mesh on the auxiliary dewatering device, and pour concrete; the method in this invention ensures that the The concrete at the water gushing part is compacted by shock pouring, which also ensures that the newly poured concrete can be gelled and hardened smoothly, thus effectively ensuring that the structure poured at the water gushing part can meet the desired requirements.

The auxiliary dewatering device provided by the present invention, as a necessary device for implementing the method of the present invention, is fixed on the reinforcement on the bottom plate, which can ensure the smooth gelation and hardening of the concrete at the water gushing part.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is a structural schematic diagram of the auxiliary dewatering device of the present invention;

In the picture:

1. Bottom plate 11. Bottom plate base surface 12. Reinforcement

2. Auxiliary precipitation device 21. Steel structure cover plate 22. Steel structure sleeve

23. Anchor bolt 24. Elastic sealant 25. Rubber waterstop

26. Barrier structure 27. Rebar 3. Reinforcement mesh.

Detailed ways

Embodiments, referring to Fig. 1 to Fig. 2, the method for sealing the underground building floor 1 water gushing pit provided by the present invention comprises the following steps:

(1) Prepare the auxiliary dewatering device 2, the auxiliary dewatering device 2 includes a steel structure cover plate 21 and a steel structure sleeve 22, the steel structure cover plate 21 is fixed to the steel structure sleeve with 4 or more sets of anchor bolts 23 On the cylinder 22; at least one elastic sealant 24 or sealing rubber ring is provided between the steel structure cover plate 21 and the steel structure sleeve 22, and the steel structure cover plate 21 is provided with a valve or a plug; the steel structure sleeve The length of the steel cylinder at the lower part of the cylinder 22 is not less than 100 mm; at least one rubber waterstop 25 is provided on the outer wall of the steel structure sleeve 22; a barrier to prevent the blockage of the submersible pump is provided at the bottom of the steel structure sleeve 22 Construct 26;

(2) A pit is dug on the base surface 11 of the water gushing well pit to be poured with concrete to seal the bottom plate of the underground building, the pit is not less than 100mm lower than the base surface, and the diameter is equal to or greater than that of the steel structure Inner diameter of the casing; surface reinforcement 12 and bottom reinforcement 12 are arranged in the bottom plate 1 of the well; the outer wall of the steel structure sleeve 22 is welded to the surface reinforcement 12 and the bottom in the well respectively. Reinforcing bars 27 or steel hooks connected to each other by reinforcing bars 12;

(3) The reinforcement 12 in the bottom plate 1 extends into the pit of the water gushing well, the steel structure sleeve 22 is vertically placed in the water gushing well pit, and fixed by welding the reinforcement 12 at a position lower than the water gushing well pit On the position of not less than 50mm on the surface;

(4) Place a submersible pump and supporting water pipes in the steel structure sleeve 22 to the bottom of the water well pit, and discharge the accumulated water in the well pit through the submersible pump. Concrete, the upper surface of the concrete is lower than the upper surface of the auxiliary dewatering device 2, and the submersible pump works until the concrete poured into the water gushing pit enters the initial setting period, so as to ensure that the concrete poured into the gushing well pit is convenient for construction to be compacted by shaking and pouring into the well smoothly. Initial setting period;

(5) After the concrete poured in the water gushing pit enters the initial setting period, the submersible pump is suspended to drain the water, so that the concrete will gel and harden under the condition of soaking water;

(6) When the strength of the concrete described in step (5) reaches 60%, start the submersible pump to pump and drain water. When the water level in the gushing well pit drops to the predetermined water level, take out the submersible pump and supporting water pipes, and promptly replace the auxiliary dewatering device 2 The steel structure cover plate 21 is anchored to the steel structure sleeve 22 installed in the gushing well pit; when there is water pressure, the valve or plug installed on the steel structure cover plate 21 is in an open state to unload the lowering effect on the The water pressure on the steel structure cover plate 21 enables the steel structure cover plate 21 and the steel structure sleeve 22 to be anchored in place smoothly, and meet the waterproof and solid sealing requirements. After the steel structure cover plate 21 is anchored, close the valve or plug;

(7) Lay reinforcement mesh 3 on the top and outside of the auxiliary dewatering device 2 of the water gushing well, and then pour concrete until it is flush with the surface of the water gushing well. Since the cementation state and quality of the concrete are controlled during construction, the strength and density of the concrete are guaranteed, thereby ensuring the quality of the solidification of the underground building floor for water gushing wells.

The auxiliary dewatering device 2 for implementing the above method provided by the present invention includes a steel structure cover plate 21 and a steel structure sleeve 22, and the steel structure cover plate 21 is fixed to the steel structure sleeve with 4 or more sets of anchor bolts 23 On the cylinder 22; at least one elastic sealant 24 or sealing rubber ring is provided between the steel structure cover plate 21 and the steel structure sleeve 22; the steel structure sleeve 22, the steel structure cover plate 21 and the anchor bolt 23 are acid-resistant Alkali-corroded stainless steel material; the lower part of the steel structure sleeve 22 is provided with a steel cylinder not less than 100 mm long; at least one rubber waterstop 25 is provided on the outer wall of the steel structure sleeve 22; The outer wall of the structural sleeve 22 is welded with a steel bar 27 or a steel hook that matches the inner surface reinforcement 12 and the bottom reinforcement 12 provided in the bottom plate 1; the steel structure cover 21 is provided with a valve or a plug, The function of the valve or plug is that, when there is water pressure, the valve or plug installed on the steel structure cover 21 is in an open state, so as to lower the water pressure acting on the steel structure cover 21 and make the steel structure cover 21 open. The structural cover plate 21 and the steel structural sleeve 22 can be anchored in place smoothly, and meet the waterproof and solid sealing requirements.

The auxiliary dewatering device 2 of the present invention is used in conjunction with the floor reinforcement 12, and the steel bar 27 welded on the steel structure sleeve 22 or the steel structure hook is adjusted according to the distribution of the reinforcement 12, and the auxiliary dewatering device 2 can be stably fixed at the desired position , and through the two times of concrete pouring construction and the auxiliary function of the steel mesh 3, the high requirements of the construction are met.

The present invention is not limited to the above-mentioned embodiments, and other methods and auxiliary dewatering devices for sealing underground building floor water gushing pits obtained by adopting the same or similar methods and devices as the above-mentioned embodiments of the present invention are covered by the protection of the present invention. within range.

Claims (10)

1. A method for sealing underground building floor gushing well pit, is characterized in that, comprises the following steps: (1) Prepare an auxiliary dewatering device, which includes a steel structure cover plate and a steel structure sleeve; (2) Dig a pit on the base surface of the water gushing well that will be poured with concrete to seal the floor of the underground building; (3) The reinforcement in the bottom plate is extended to the water gushing well pit, the steel structure sleeve is placed vertically in the pit of the water gushing well pit, and the reinforcement and the steel structure sleeve are fixed; (4) Put a submersible pump and supporting water pipes into the steel structure sleeve to the bottom of the water gushing well pit, discharge the accumulated water in the water gushing well pit through the submersible pump, and pour concrete in the water gushing well pit and the periphery of the steel structure sleeve, The submersible pump has been working until the concrete poured into the water gushing pit enters the initial setting period, so as to ensure that the concrete poured into the gushing well pit is convenient for construction to be compacted and enters the initial setting period smoothly; (5) After the concrete poured in the water gushing pit enters the initial setting period, the submersible pump is suspended to drain the water, so that the concrete is gelled and hardened under the condition of soaking water; (6) When the strength of the concrete described in step (5) reaches 60%, start the submersible pump to pump and drain water. When the water level in the gushing well pit is lowered, take out the submersible pump and supporting water pipes, and cover the steel structure of the auxiliary dewatering device in time. The plate is anchored to the steel sleeve installed in the gushing pit; (7) Lay reinforcement mesh on the top and outside of the auxiliary dewatering device of the gushing well pit, and then pour concrete until it is flush with the surface of the gushing well. 2. The method for sealing the water gushing well pit on the floor of an underground building according to claim 1, characterized in that the step (2) specifically further includes the following content, the pit of the water gushing well pit is lower than the base surface The diameter is not less than 100mm, and the diameter is equal to or greater than the inner diameter of the steel casing; the step (3) specifically also includes the following content, the steel casing is fixed at a position not less than 50mm below the surface of the water gushing pit. 3. The method for sealing underground building floor water gushing pits according to claim 1, characterized in that the length of the steel cylinder at the bottom of the steel structure sleeve is not less than 100mm; There is at least one rubber waterstop; surface reinforcement and bottom reinforcement are arranged in the bottom plate, and steel bars connected to the surface layer and bottom reinforcement in the well pit are respectively welded on the outer wall of the steel structure sleeve or Steel hooks. 4. The method for sealing the water gushing pit of an underground building floor according to claim 1, wherein the steel structure cover plate is fixed on the steel structure sleeve with 4 or more sets of anchor bolts; There is at least one elastic sealant or sealing rubber ring between the structure cover plate and the steel structure sleeve. 5 . The method for sealing the well pit for water gushing on the floor of an underground building according to claim 1 , wherein the steel structure cover plate is provided with a valve or a plug. 6 . 6. The method for sealing the water gushing pit of the underground building floor according to claim 5, characterized in that the step (6) specifically further includes the following content, when there is water pressure, the steel structure cover plate is anchored When the steel structure sleeve of the water gushing well pit is installed, the valve or plug installed on the steel structure cover plate is in an open state to relieve the water pressure acting on the steel structure cover plate, so that the steel structure cover plate and the steel structure cover plate The structural sleeve can be anchored in place smoothly and meet the requirements of waterproof and solid sealing. 7. The method for sealing the well pit for water gushing on the floor of an underground building according to claim 1, characterized in that, a barrier structure for preventing the clogging of the submersible pump is provided at the bottom of the steel structure sleeve. 8. An auxiliary dewatering device for implementing the method according to any one of claims 1-7, characterized in that it comprises a steel structure cover plate and a steel structure sleeve, and a minimum of An elastic sealant or sealing rubber ring, the steel structure cover plate is fixed on the steel structure sleeve with 4 or more sets of anchor bolts; steel bars or steel structure hooks are welded on the outer wall of the steel structure sleeve, At least one rubber waterstop is provided on the outer wall of the steel structure sleeve. 9. The auxiliary dewatering device according to claim 8, characterized in that, the steel structure sleeve, the steel structure cover plate and the anchor bolt are stainless steel materials resistant to acid and alkali corrosion, and the lower part of the steel structure sleeve is provided with a section A steel cylinder not less than 100mm long; the steel structure cover plate is provided with a valve or a plug. 10 . The auxiliary dewatering device according to claim 8 , characterized in that, a barrier structure for preventing the submersible pump from being blocked is provided at the bottom of the steel structure sleeve. 11 .

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