CN103161172B - Elevator shaft bottom precipitation construction method - Google Patents

Abstract

A construction method for dewatering the bottom of a building elevator shaft, the method comprising the following steps: digging a sump downward at the bottom of the elevator shaft; pre-burying metal pipes in the sump; Metal pipes are fixed in the sump; self-priming pumps are used for pumping operations, and concrete cushions are poured while pumping water; waterproof membranes are laid; concrete protective layer construction operations are carried out; foundation floor construction operations are carried out. The construction method for dewatering at the bottom of the elevator shaft of a building in the present invention can effectively control the actual difficulty that the next process cannot be carried out due to excessive water accumulation in the elevator shaft; it ensures the normal construction of the cushion layer; The bottom surface of the foundation is bulging due to accumulated water.

Description

Construction Method of Elevator Shaft Bottom Dewatering

technical field

The invention relates to a building construction method, in particular to a construction method for dewatering the bottom of a building elevator well.

Background technique

At present, during the construction of the building foundation, due to the backwater of the groundwater, there is often too much water in the elevator shaft, which makes it impossible to carry out the construction of the concrete cushion and waterproof membrane laying process in the elevator shaft. If the cushion is forcibly constructed and the waterproof membrane is laid , the waterproof membrane is easy to be bulged out of the surface of the bottom plate by water.

At present, the precipitation on the construction site is dewatered from wells around the foundation pit. This method can control the water level inside the foundation pit. However, this method has the following defects: the elevation of the bottom of the elevator shaft is at the lower part of the foundation pit. The construction will cause great difficulties. If the water is drained and the cushion and waterproof membrane are forcibly constructed, the waterproof membrane will be bulged out of the surface of the bottom plate by the water, and the waterproof protective layer will be cracked. Therefore cause certain difficulty to the construction of next working procedure.

Contents of the invention

Aiming at the deficiencies in the above-mentioned prior art, the present invention effectively eliminates the technical problem that the waterproof coiled material is bulged out of the surface of the bottom plate by water, resulting in the inability to carry out the construction of the concrete cushion and the waterproof coiled material laying process at the bottom of the elevator shaft, and provides a building A construction method for dewatering at the bottom of an elevator well.

The technical scheme that the present invention takes is:

A construction method for dewatering at the bottom of a building elevator shaft, the method comprising the following steps:

a. Dig down the bottom of the elevator shaft by 1m to 1.2m to make a sump with a diameter of 500mm to 700mm at the bottom and a diameter of 700mm to 900mm at the top; a metal pipe is embedded in the sump, and the diameter of the metal pipe is 80mm to 120mm;

b. Backfill the sump with stones to the level of the cushion layer, and fix the metal pipe in the sump;

c. Use self-priming pumps for pumping operations, pump out the accumulated water in the sump, and pour concrete cushions while pumping water; lay waterproof membranes; use waterproof ointment at the junction of waterproof membranes and metal pipes Metal pipe seal;

d. Carry out concrete protective layer construction work;

e. Carry out foundation floor construction work;

f. The metal pipe is provided with a ring water stop plate on the base floor layer:

g. Cut off the metal pipe; seal the metal pipe tightly.

A circular hole with a diameter of 10 mm to 20 mm is provided at the root of the metal pipe.

The particle diameter of the backfilled stones is 20mm-40mm.

The sealing of the metal pipe is to insert linoleum and asbestos cement into the metal pipe, and then use micro-expansion cement to seal; or use a metal plate to weld the metal pipe mouth to seal.

There are at least two circular water stop plates.

The ring water stop plate is arranged in the middle of the base floor layer.

The thickness of the ring water stop plate is 3mm-8mm; the outer diameter is 150mm-180mm.

The ring water stop plate is welded during construction or welded in advance.

The height between the lower end of the metal pipe and the bottom of the sump is 1/4 of the total height of the sump. The beneficial effect of the present invention relative to prior art:

The construction method for dewatering at the bottom of the elevator shaft of a building in the present invention can effectively control the actual difficulty that the next process cannot be carried out due to excessive water accumulation in the elevator shaft; it ensures the normal construction of the cushion layer; The bottom surface of the foundation is bulging due to accumulated water.

Description of drawings

Fig. 1 is a schematic diagram of construction structure for dewatering at the bottom of a building elevator shaft of the present invention;

Explanation of symbols of main components in the accompanying drawings:

In the picture:

1. Concrete base plate 2. Concrete protective layer

3. Waterproof membrane 4. Concrete cushion

5. Ring water stop plate 6. Metal pipe

7. Stone 8. Round hole

9, waterproof ointment 10, sump.

detailed description

The present invention is described in detail below with reference to accompanying drawing and embodiment:

Accompanying drawing 1 as can be known, a kind of building elevator shaft bottom dewatering construction method, this method comprises the steps:

a. Dig the bottom of the elevator shaft down 1m-1.2m to make a sump with a diameter of 500mm-700mm at the bottom and a diameter of 700mm-900mm at the top; a metal pipe 6 is embedded in the sump 10, and the diameter of the metal pipe 6 is 80mm ~120mm;

b. Backfill the sump 10 with stones 7 to the level of the cushion layer, and fix the metal pipe 6 in the sump 10;

c. Use a self-priming pump to pump water, pump out the accumulated water in the sump 10, and pour the concrete cushion 4 while pumping; lay the waterproof membrane 3; at the junction of the waterproof membrane 3 and the metal pipe 6, Use waterproof ointment 9 to seal metal pipe 6;

d. Carry out the construction work of concrete protection layer 2;

e. Carry out the construction work of the base plate 1;

f. The metal pipe 6 is provided with a circular water stop plate 5 on the base floor layer 1:

g. Cut off the metal pipe 6; seal the metal pipe 6 tightly.

The root of the metal pipe 6 is provided with a round hole with a diameter of 10mm-20mm.

The diameter of the particles of the backfilled stones 7 is 20mm-40mm.

The sealing of the metal pipe 6 is to stuff linseed and asbestos cement into the metal pipe 6, and then use micro-expansion cement to seal; or use a metal plate to weld the metal pipe mouth to seal.

There are at least two annular water stop plates 5 .

The ring water stop plate 5 is arranged in the middle of the base floor layer 1 .

The thickness of the ring water stop plate 5 is 3mm-8mm; the outer diameter is 150mm-180mm.

The ring water stop plate 5 is welded during construction and can also be welded in advance.

The height of the lower end of the metal pipe 6 from the bottom of the sump 10 is 1/4 of the total height of the sump 10 .

If the waterproof protective layer in the elevator shaft has been poured and is cracked by the waterproof coiled material, then the concrete of the protective layer is cut open, the bulged waterproof coiled material is cut, and then the above construction is carried out.

The metal pipe used in the present invention can also be a non-metallic pipe with sufficient wall thickness, and a bonding sealing method can be used for sealing.

The construction method for dewatering at the bottom of the elevator shaft of a building in the present invention can effectively control the actual difficulty that the next process cannot be carried out due to excessive water accumulation in the elevator shaft; it ensures the normal construction of the cushion layer; The bottom surface of the foundation is bulging due to accumulated water.

Claims (9)

1. a building elevator shaft bottom precipitation construction method, is characterized in that the method comprises the steps:

A. elevator shaft bottom is dug 1m ~ 1.2m downwards, make base diameter 500mm ~ 700mm, the sump of top diameter 700mm ~ 900mm; Built-in metal pipe in sump, described metal tube diameter 80mm ~ 120mm;

B. backfill stone in sump, is backfilled to bed course absolute altitude, and is fixed in sump by metal tube;

C. adopt self prime pump to carry out drawing water operation, the ponding in sump is extracted out, and the Pouring concrete at the same time bed course drawn water; Laying water-proof coiled material; In waterproof roll and metal tube junction, waterproofing unction is used to be sealed by metal tube;

D. concrete cover construction operation is carried out;

E. sole plate construction operation is carried out;

F. metal tube is provided with annulus seal plate at sole plate layer:

G. metal tube is cut off; By closely knit for metal tube shutoff.

2. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: described metal tube root is provided with the circular hole of diameter 10mm ~ 20mm.

3. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: the diameter of the particle of described backfill stone is: 20mm ~ 40mm.

4. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: described metal tube shutoff is that spunyarn and asbestos cement are filled in metal tube, then uses micro-expansion cement sealing; Or use metal sheet metal pipe mouth to be welded and carry out shutoff.

5. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: described annulus seal plate is at least twice.

6. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: described annulus seal plate is arranged on sole plate layer centre position.

7. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: the thickness of described annulus seal plate is 3mm ~ 8mm; External diameter 150mm ~ 180mm.

8. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: described annulus seal plate is the welding or weld in advance when constructing.

9. building elevator shaft bottom precipitation construction method according to claim 1, is characterized in that: the height of described metal tube lower end bottom sump is 1/4th of sump overall height.