CN218148385U

CN218148385U - Precast concrete foundation ditch bank protection

Info

Publication number: CN218148385U
Application number: CN202222186722.3U
Authority: CN
Inventors: 陈雁云; 郭宝圣; 沈伟; 冉垂正; 曾宇廷
Original assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Current assignee: Road and Bridge International Co Ltd; Road and Bridge East China Engineering Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-12-27
Anticipated expiration: 2032-08-19

Abstract

The utility model relates to a precast concrete foundation pit slope protection, which comprises a plurality of rectangular precast concrete plates, wherein a steel bar net is arranged in each precast concrete plate, the top surface of each precast concrete plate is provided with 4 lifting rings, the lower ends of the lifting rings are pre-embedded in concrete and welded with the steel bar net, and each precast concrete plate is provided with a plurality of preformed holes; a plurality of prefabricated plates are fully paved on the side slope of the foundation pit, and waterproof rubber strips are embedded in gaps between adjacent prefabricated plates; an anchor rod is arranged in each preformed hole, the anchor rod is inserted into slope rock soil at an angle vertical to the slope surface, and cement mortar is filled in a gap between the anchor rod and the preformed hole. The utility model discloses construction bank protection is fast, the recoverable used repeatedly of prefabricated plate.

Description

Precast concrete foundation ditch bank protection

Technical Field

The utility model belongs to the technical field of the civil engineering construction, a protection construction of foundation ditch side slope is related to, concretely relates to precast concrete foundation pit bank protection.

Background

When the underground infrastructure is built, a deeper foundation pit is usually required to be excavated, and the construction period is longer. Because undisturbed soil is disturbed when the foundation pit is excavated, slope protection is required to be carried out in order to avoid collapse of the foundation pit slope. The conventional method is to lay a reinforcing mesh on the side slope and then spray a layer of concrete to form the slope protection, so that the field construction amount is large, the process is complex, the side slope protection is not timely due to slow construction progress, and required consumables cannot be recycled, so that great waste is caused.

Disclosure of Invention

The utility model aims at the above-mentioned problem, a precast concrete foundation ditch bank protection is provided for bank protection construction progress to it is extravagant to reduce the material, reduces construction cost.

The technical scheme of the utility model as follows:

the utility model provides a precast concrete foundation pit bank protection which characterized in that: the concrete prefabricated slab comprises a plurality of rectangular concrete prefabricated slabs, wherein a steel bar net is arranged in each prefabricated slab, 4 hanging rings are arranged on the top surface of each prefabricated slab corresponding to 4 corners, the lower ends of the hanging rings are embedded in concrete and welded with the steel bar net, a plurality of anchor rod through holes are formed in each prefabricated slab, and the anchor rod through holes are perpendicular to the slab surface of the prefabricated slab; a plurality of prefabricated plates are fully paved on a foundation pit slope, waterproof rubber strips are embedded in gaps between adjacent prefabricated plates, an anchor rod is arranged in each anchor rod through hole on each prefabricated plate, the anchor rod is inserted into slope rock soil at an angle vertical to the slope surface, and cement mortar is filled in gaps between the anchor rods and the anchor rod through holes.

Furthermore, according to the precast concrete foundation pit revetment, each precast slab is provided with at least one drain pipe preformed hole, a drain pipe penetrates through each drain pipe preformed hole, the drain pipe is made of a PVC pipe, the pipe wall of the drain pipe is provided with a plurality of water seepage holes, coarse sand is filled in the drain pipe, the rear end of the drain pipe is inserted into the rock soil of the side slope to a certain depth, and the front end of the drain pipe protrudes out of the precast slab and inclines towards the lower side of the side slope.

The utility model discloses the prefabricated plate that adopts can be processed at the back, and fortune is on the side slope to on-the-spot direct mount, and the bank protection construction speed is fast, can dismantle used repeatedly with the prefabricated plate after underground works accomplishes moreover, and it is extravagant to reduce the material.

Drawings

Fig. 1 is a schematic view of a local plane structure of a revetment according to the present invention;

FIG. 2 is a schematic view of a partial cross-sectional structure of the prefabricated panels;

fig. 3 is the utility model discloses a local facade structure schematic diagram of bank protection.

Detailed Description

As shown in fig. 1, 2 and 3, the utility model comprises a plurality of rectangular concrete precast slabs 1, a steel bar net 11 is arranged in each precast slab, 4 rings 12 are arranged on the top surface of each precast slab corresponding to 4 corners, the lower ends of the rings are pre-embedded in the concrete and welded with the steel bar net, a plurality of anchor rod through holes 13 are arranged on each precast slab, and the anchor rod through holes are vertical to the slab surface of the precast slab; a plurality of precast slabs are fully paved on a foundation pit slope, waterproof rubber strips 2 are embedded in gaps between adjacent precast slabs, an anchor rod 3 is arranged in each anchor rod through hole on each precast slab, the anchor rod is inserted into slope rock soil at an angle vertical to the slope surface, and cement mortar is filled in gaps between the anchor rods and the anchor rod through holes.

The utility model discloses during the concrete implementation, still can still be equipped with at least one outlet pipe preformed hole 14 on every prefabricated plate, when the prefabricated plate was laid on the side slope, wear to establish a outlet pipe 4 in every outlet pipe preformed hole, the outlet pipe adopts the PVC pipe, opens a plurality of infiltration holes on the pipe wall, coarse sand in the filling in the outlet pipe, certain degree of depth in the outlet pipe rear end inserted the side slope ground, the outlet pipe front end is outstanding outside the prefabricated plate and to the slope below slope.

When the precast slab of the utility model is poured, the anchor rod through hole and the drain pipe preformed hole on the precast slab are formed by adopting a PVC pipe, a certain inclination angle is preset between the drain pipe preformed hole and the precast slab surface, and the inclination angle is smaller than the slope angle of the side slope to be constructed, so that when the drain pipe is inserted into the preformed hole, the drain pipe can incline towards the lower part of the side slope; the lifting ring is U-shaped by bending the plain steel bars, two ends of the lifting ring are welded with the steel bar net before concrete pouring, the top of the lifting ring is higher than the top surface of the prefabricated plate by a certain height, and the prefabricated plate can be lifted by a crane through the lifting ring.

During construction, the prefabricated plates are paved from the bottom of the foundation pit slope to the top row by row; when the precast slabs are provided with the preformed holes of the water drain pipes, when each precast slab is laid, the water drain pipes are firstly embedded into the side slope soil body according to the positions of the holes of the water drain pipes, and then the front ends of the water drain pipes penetrate out of the precast slabs; and after each row of prefabricated plates are laid, laying a waterproof rubber strip at the top of one row, then laying the next row upwards, and ensuring that the bottom edges of the upper row of prefabricated plates compress the rubber sealing strips at the top edges of the lower row of prefabricated plates. After the prefabricated slabs are completely laid, anchor rods are arranged in the through holes of the anchor rods, mortar is poured into the through holes of the anchor rods, and waterproof rubber strips are embedded into vertical seams of the left prefabricated slabs and the right prefabricated slabs which are adjacent to each other, so that foundation pit slope protection construction is completed. And after the underground engineering construction is finished, the prefabricated slab is dismantled and recycled for reuse.

Claims

1. The utility model provides a precast concrete foundation pit bank protection which characterized in that: the concrete prefabricated slab comprises a plurality of rectangular concrete prefabricated slabs, wherein a steel bar net is arranged in each prefabricated slab, 4 hanging rings are arranged on the top surface of each prefabricated slab corresponding to 4 corners, the lower ends of the hanging rings are embedded in concrete and welded with the steel bar net, a plurality of anchor rod through holes are formed in each prefabricated slab, and the anchor rod through holes are perpendicular to the slab surface of the prefabricated slab; a plurality of prefabricated plates are fully paved on a foundation pit side slope, waterproof rubber strips are embedded in gaps between every two adjacent prefabricated plates, an anchor rod is arranged in each anchor rod through hole in each prefabricated plate, the anchor rods are inserted into side slope rock soil at an angle perpendicular to the slope surface, and cement mortar is filled in gaps between the anchor rods and the anchor rod through holes.

2. The precast concrete foundation pit protection slope according to claim 1, characterized in that: each prefabricated plate is also provided with at least one drain pipe preformed hole, a drain pipe penetrates through each drain pipe preformed hole, the drain pipe is made of a PVC pipe, the pipe wall of the drain pipe is provided with a plurality of water seepage holes, coarse sand is filled in the drain pipe, the rear end of the drain pipe is inserted into slope rock soil to a certain depth, and the front end of the drain pipe protrudes out of the prefabricated plate and inclines towards the lower side of the slope.