CN217325439U

CN217325439U - Structure for rapidly reducing local water level of foundation pit

Info

Publication number: CN217325439U
Application number: CN202123234718.1U
Authority: CN
Inventors: 秦绍清; 孙富军; 沈启伟; 王力; 汪涛; 曹孟齐
Original assignee: Fourth Construction Co ltd Of China National Chemical Engineering
Current assignee: Fourth Construction Co ltd Of China National Chemical Engineering
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-08-30
Anticipated expiration: 2031-12-21

Abstract

The utility model discloses a reduce structure of local water level of foundation ditch fast aims at solving foundation ditch drainage effect not good, appears collapsing the not enough of unstability phenomenon easily among the drainage process. The utility model discloses an including setting up open caisson, drain pipe, the steel reinforcement cage of preventing elevator well position in the foundation ditch, the open caisson bottom is equipped with metalling, concrete bottom, and the metalling sets up in concrete bottom below, lays the tarpaulin between metalling and the concrete bottom, and the steel reinforcement cage lower extreme passes concrete bottom and metalling, forms the convergent hole in the steel reinforcement cage, and the drain pipe inserts in the convergent hole. The structure for rapidly reducing the local water level of the foundation pit can rapidly reduce the water level of the foundation pit, and is good in precipitation effect and safe and reliable in construction process.

Description

Structure for rapidly reducing local water level of foundation pit

Technical Field

The utility model relates to a foundation ditch construction technical field, more specifically say, it relates to a structure that reduces local water level of foundation ditch fast.

Background

In the foundation pit engineering construction, when the underground water level is higher than the excavation ground, because the aquifer is cut off, under the influence of pressure difference, underground water can continuously infiltrate into the pit, causing the problems of the foundation pit such as water immersion, slope instability, and sand gushing at the bottom of the pit. The foundation pit dewatering means that the groundwater in a certain range and depth is extracted, so that the groundwater level in the specific range is lowered to be below the excavation surface. The extracted groundwater is discharged into municipal pipelines or open channels, rivers and the like through drainage pipelines or is used in construction projects. Traditional tube well precipitation method generally sets up at the foundation ditch periphery, and the deeper groundwater of foundation ditch middle part buried depth is difficult for excreting, and when the stratum is sand bed soil, because lack the effect of strutting, the peripheral soil body of tube well collapses the unstability easily.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned not enough, the utility model provides a reduce structure of local water level of foundation ditch fast, it can reduce the foundation ditch water level fast, and precipitation is effectual, the work progress safe and reliable.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a structure of local water level of quick reduction foundation ditch, prevents open caisson, drain pipe, the steel reinforcement cage of elevator shaft position in the foundation ditch including setting up, the open caisson bottom is equipped with metalling, concrete bottom, and the metalling sets up in concrete bottom below, lays the tarpaulin between metalling and the concrete bottom, and the steel reinforcement cage lower extreme passes concrete bottom and metalling, forms the convergent hole in the steel reinforcement cage, and the drain pipe inserts in the convergent hole.

Prevent the elevator shaft position in the sunk well setting is in the foundation ditch, because prevent the elevator shaft deepest in the foundation ditch, consequently the water level of this position is minimum, draws water just can reduce the interior water level of foundation ditch fast to this position through the drain pipe, and precipitation is effectual. The drain pipe inserts the hole that converges that the steel reinforcement cage formed, and the open caisson bottom is equipped with the metalling, and the collection of the rivers of being convenient for, hole stable in structure converges can not sink. The open caisson plays a good supporting role, and the strength of the whole structure is ensured under the action of the concrete bottom layer, so that the construction is safer and more reliable. The waterproof cloth prevents that the concrete bottom from pouring in-process grout from flowing into the rubble layer. The steel reinforcement cage plays the filter screen effect, filters a large amount of grit, has reduced the grit content that gets into the water pump along with groundwater. The structure for rapidly reducing the local water level of the foundation pit can rapidly reduce the water level of the foundation pit, and is good in precipitation effect and safe and reliable in construction process.

Preferably, the upper end of the reinforcement cage is close to the upper surface of the concrete bottom layer, the upper end of the reinforcement cage is connected with a flange plate, a waterproof sleeve is installed on the flange plate, and the drain pipe penetrates through the waterproof sleeve.

And after the foundation pit precipitation stops, taking out the drain pipe, filling concrete in the confluence hole, and connecting the confluence hole to the waterproof sleeve by using a sealing cover for sealing. Therefore, the waterproof sleeve is arranged to play a good sealing role.

Preferably, the end cover is arranged at the upper end of the waterproof casing pipe, the two movable positioning clamping seats are arranged on the end cover, the arc-shaped clamping grooves are formed in the positioning clamping seats, the drain pipe is clamped between the two arc-shaped clamping grooves, and the locking screws are connected between the two positioning clamping seats. After the drain pipe is inserted into the confluence hole, the two positioning clamp seats are moved towards the direction of mutual approaching, so that the two positioning clamp seats are clamped outside the drain pipe and are locked by screws, and the drain pipe is reliably positioned.

Preferably, the end cover is provided with a T-shaped groove, the positioning clamping seat is provided with a T-shaped sliding block, and the sliding block is connected with the T-shaped groove in a sliding mode. The slide block moves in the T-shaped groove, so that the positioning clamp holder and the end cover are prevented from being axially separated.

Preferably, the steel reinforcement cage is externally wrapped with a plurality of layers of filter screens. The filter screen has improved the filtering action of steel reinforcement cage.

Preferably, a water insulating sleeve is arranged between the concrete bottom layer and the reinforcement cage. The water separating sleeve plays a good role in separating water in the pouring process of the concrete bottom layer, and prevents cement paste from flowing into the reinforcement cage.

Preferably, the concrete reinforced wall is poured outside the open caisson in the foundation pit. The concrete reinforced wall further improves the supporting function of the open caisson.

Preferably, a plurality of connecting boxes are fastened in the reinforcement cage, reinforcing rods and locking pins are installed in the connecting boxes, the upper ends of the reinforcing rods are hinged to the upper ends of the connecting boxes, and guide surfaces which are obliquely arranged are arranged at the end parts of the locking pins; the stay cord is connected to the inner side of the steel reinforcement cage, the reinforcing rods are connected with the stay cord, the upper end of the stay cord extends out of the upper end of the steel reinforcement cage, and the stay cord is pulled upwards to enable the reinforcing rods to rotate upwards to slide on the guide surface and be limited between the upper ends of the locking pins and the connecting box.

After the foundation pit precipitation stops, take out the drain pipe, then upwards stimulate the stay cord, make the stiffener rotate upwards and slide the spigot surface and spacing between lock round pin and connecting box upper end, during the stiffener tip stretched into the confluence hole, the downthehole concrete that fills up of confluence, the stiffener has improved the structural strength of concrete.

Compared with the prior art, the beneficial effects of the utility model are that: the structure of the local water level of the foundation pit can be quickly reduced, the precipitation effect is good, and the construction process is safe and reliable.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a partially enlarged schematic view of fig. 1 of the present invention;

in the figure: 1. fire control elevartor shaft, 2, open caisson, 3, the drain pipe, 4, steel reinforcement cage, 5, rubble layer, 6, concrete bottom, 7, tarpaulin, 8, the hole that converges, 9, the ring flange, 10, the waterproof jacket pipe, 11, the end cover, 12, the location holder, 13, locking screw, 14, the T-slot, 15, the slider, 16, the filter screen, 17, separate the water jacket, 18, the concrete reinforcing wall, 19, the connecting box, 20, the stiffener, 21, the locking round pin, 22, the stay cord, 23, the water pump.

Detailed Description

The technical solution of the present invention is further described in detail by the following specific embodiments in combination with the accompanying drawings:

example (b): the utility model provides a structure (see figure 1, figure 2) of local water level of quick reduction foundation ditch, including setting up the open caisson 2, drain pipe 3, the steel reinforcement cage 4 that prevent 1 position of elevator shaft in the foundation ditch, the open caisson bottom is equipped with metalling 5, concrete bottom 6, the metalling sets up in concrete bottom below, lays tarpaulin 7 between metalling and the concrete bottom, and the steel reinforcement cage lower extreme passes concrete bottom and metalling, forms in the steel reinforcement cage and converges flow hole 8, and the drain pipe inserts in the flow hole that converges.

The upper end of the steel reinforcement cage is close to the upper surface of the concrete bottom layer, the upper end of the steel reinforcement cage is connected with a flange plate 9, a waterproof sleeve 10 is installed on the flange plate, and the drain pipe penetrates through the waterproof sleeve. An end cover 11 is arranged at the upper end of the waterproof casing pipe, two movable positioning clamping seats 12 are arranged on the end cover, arc-shaped clamping grooves are formed in the positioning clamping seats, the drain pipe is clamped between the two arc-shaped clamping grooves, and locking screws 13 are connected between the two positioning clamping seats. The end cover is provided with a T-shaped groove 14, the positioning clamping seat is provided with a T-shaped sliding block 15, and the sliding block is connected with the T-shaped groove in a sliding mode.

And a plurality of layers of filter screens 16 are wrapped outside the reinforcement cage, the filter screens are steel wire meshes, and the filter screens are arranged below the concrete bottom layer. A water-separating sleeve 17 is arranged between the concrete bottom layer and the reinforcement cage. And a concrete reinforcing wall 18 is poured outside the open caisson in the foundation pit.

A plurality of connecting boxes 19 are fastened in the reinforcement cage, reinforcing rods 20 and locking pins 21 are installed in the connecting boxes, the upper ends of the reinforcing rods are hinged to the upper ends of the connecting boxes, and guide surfaces which are obliquely arranged are arranged at the end parts of the locking pins; stay cord 22 is connected in the steel reinforcement cage, and the stiffener all is connected with the stay cord, and the steel reinforcement cage upper end is extended to the stay cord upper end, and the stay cord upwards stimulates messenger's stiffener upwards to rotate and slide the spigot surface and spacing between lock round pin and junction box upper end. The upper end of the pull rope is connected to the end cover. And a positioning spring is arranged between the locking pin and the connecting box.

The open caisson sets up and prevents the elevator shaft position in the foundation ditch, because prevent the elevator shaft deepest in the foundation ditch, therefore the water level of this position is minimum, draws water just can reduce the foundation ditch internal water level fast to this position through the drain pipe, and precipitation is effectual. The drain pipe inserts the hole that converges that the steel reinforcement cage formed, and the open caisson bottom is equipped with the rubble layer, and the collection of the rivers of being convenient for, hole stable in structure converges can not sink. The open caisson plays a good supporting role, and the strength of the whole structure is ensured under the action of the concrete bottom layer, so that the construction is safer and more reliable. The waterproof cloth prevents that the concrete bottom from pouring in-process grout from flowing into the rubble layer. The steel reinforcement cage plays the filter screen effect, filters a large amount of grit, has reduced the grit content that gets into the water pump along with groundwater. The structure for rapidly reducing the local water level of the foundation pit can rapidly reduce the water level of the foundation pit, has good dewatering effect and is safe and reliable in construction process.

During the precipitation operation, connect water pump 23 at the drain pipe lower extreme, insert the downthehole bottom position of convergent flow along with the drain pipe together, start the water pump and carry out the drainage. After the foundation pit precipitation stops, the drain pipe is taken out, then upwards pulls the stay cord, makes the stiffener rotate upwards and slide the spigot surface and spacing between lock round pin and connecting box upper end, and during the stiffener tip stretched into the confluence hole, the concrete was filled up in the confluence hole. And then the open caisson is dismantled, a fire elevator shaft and other elevator shafts are poured in the foundation pit, and the open caisson is connected with a waterproof sleeve by a sealing cover for sealing.

The above-described embodiments are merely preferred and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The utility model provides a structure of local water level of quick reduction foundation ditch, characterized by, including setting up open caisson, drain pipe, the steel reinforcement cage that prevents elevator shaft position in the foundation ditch, the open caisson bottom is equipped with metalling, concrete bottom, and the metalling sets up in concrete bottom below, lays the tarpaulin between metalling and the concrete bottom, and the steel reinforcement cage lower extreme passes concrete bottom and metalling, forms the convergent hole in the steel reinforcement cage, and the drain pipe inserts in the convergent hole.

2. The structure of claim 1, wherein the upper end of the reinforcement cage is close to the upper surface of the concrete bottom layer, the upper end of the reinforcement cage is connected with a flange, a waterproof sleeve is mounted on the flange, and the drain pipe penetrates through the waterproof sleeve.

3. The structure of claim 2, wherein the top end of the waterproof sleeve is provided with an end cap, the end cap is provided with two movable positioning holders, the positioning holders are provided with arc-shaped holding grooves, the drain pipe is held between the two arc-shaped holding grooves, and the two positioning holders are connected with locking screws.

4. The structure for rapidly reducing the local water level of the foundation pit as claimed in claim 3, wherein the end cap is provided with a T-shaped slot, the positioning holder is provided with a T-shaped sliding block, and the sliding block is slidably connected with the T-shaped slot.

5. The structure of claim 1, wherein the reinforcement cage is wrapped with a plurality of layers of filter screens.

6. The structure for rapidly reducing the local water level of the foundation pit as claimed in claim 1, wherein a water isolation sleeve is arranged between the concrete bottom layer and the reinforcement cage.

7. The structure for rapidly reducing the local water level of a foundation pit as claimed in any one of claims 1 to 6, wherein a concrete reinforced wall is poured outside the open caisson in the foundation pit.

8. The structure for rapidly reducing the local water level of the foundation pit as claimed in any one of claims 1 to 6, wherein a plurality of connecting boxes are fastened in the reinforcement cage, reinforcing rods and locking pins are arranged in the connecting boxes, the upper ends of the reinforcing rods are hinged at the upper ends of the connecting boxes, and the end parts of the locking pins are provided with guide surfaces which are obliquely arranged; the stay cord is connected to the inner side of the steel reinforcement cage, the reinforcing rods are connected with the stay cord, the upper end of the stay cord extends out of the upper end of the steel reinforcement cage, and the stay cord is pulled upwards to enable the reinforcing rods to rotate upwards to slide on the guide surface and be limited between the upper ends of the locking pins and the connecting box.