CN108532627B

CN108532627B - Temporary plugging method for pipe gallery port of bolt-fixed prefabricated plate

Info

Publication number: CN108532627B
Application number: CN201810342435.2A
Authority: CN
Inventors: 白尧尧; 张桂军; 刘凯; 罗后德; 徐秋明
Original assignee: China First Metallurgical Group Co Ltd
Current assignee: China First Metallurgical Group Co Ltd
Priority date: 2018-04-17
Filing date: 2018-04-17
Publication date: 2020-10-23
Anticipated expiration: 2038-04-17
Also published as: CN108532627A

Abstract

The invention provides a temporary plugging method for a pipe gallery port of a bolt-fixed precast slab, which comprises the following steps: step 1, binding reinforcing steel bars of a pipe gallery wall body after a pipe gallery bottom plate is manufactured, reserving a groove on a wall body of an end part to be plugged of the pipe gallery, and embedding a water stop screw; step 2, hoisting a plurality of prepared dry concrete precast slabs to the positions of the pre-buried grooves, and locking and fixing the precast slabs through split bolts after assembly; step 3, arranging isolation layers on the upper end face and the side end face of the prefabricated slab, and then arranging a branch pipe gallery wall body and a top plate template; step 4, binding steel bars of a top plate of the pipe gallery, and pouring concrete of the wall body and the top plate of the pipe gallery; step 5, after concrete curing of the wall body of the pipe gallery is finished, removing the formwork, and fastening a water stop screw rod pre-embedded in the wall body after penetrating the water stop screw rod into a hole in the precast slab; and 6, performing waterproof treatment on each joint and the assembly joint. The temporary plugging method of the invention can not cause the damage of the main body structure and has lower cost; waterproof performance is good, and fixed mode is simple, makes things convenient for later stage block structure to demolish inside the piping lane.

Description

Temporary plugging method for pipe gallery port of bolt-fixed prefabricated plate

Technical Field

The invention relates to the technical field of pipe gallery plugging during subsection or staged construction of an underground comprehensive pipe gallery, in particular to a temporary plugging method for a pipe gallery port of a precast slab fixed by a bolt near a pipe gallery.

Background

In recent years, urban underground utility tunnels have become one of the important signs for the modern construction of municipal infrastructure. The city underground comprehensive pipe gallery is a modern, scientific and intensive city infrastructure, and more than two pipelines of electric power, natural gas, communication, water supply, refrigeration and the like are laid in the same space below a road. The problems of repeated excavation of the road surface, difficult pipeline maintenance, dense overhead hanging lines and the like are solved, and the centralized management and maintenance of the urban pipelines are realized. Therefore, the deep research and popularization of the urban comprehensive pipe gallery construction technology and method have practical significance.

Because city utility tunnel construction's cycle length, wide range, with high costs, the piping lane divides the multistage construction under the general condition. The time interval between the constructed pipe gallery and the long-term construction of the pipe gallery is less, and then months and more, years. Therefore, in order to protect the internal equipment of the constructed pipe gallery and ensure that the normal operation is not affected, the two ends of the constructed pipe gallery are temporarily plugged. During plugging, the relation between the plugging wall and the main structure is considered at first, the main structure cannot be damaged, the plugging wall is convenient to dismantle, the safety of the plugging structure is ensured, and meanwhile, the practicability and the cost of the plugging method are considered.

Disclosure of Invention

Aiming at the problems in the prior art, the technical scheme adopted by the invention for solving the problems in the prior art is as follows:

a temporary plugging method for a pipe gallery port of a bolt-fixed precast slab is characterized by comprising the following steps:

step 1, binding reinforcing steel bars of a wall body of the pipe gallery after the manufacturing of a bottom plate of the pipe gallery is finished, reserving a groove on the wall body of the pipe gallery in a range of 200-300 mm inward of the end part to be plugged, and embedding a water stop screw;

step 2, hoisting a plurality of prepared precast concrete slabs to the positions of the pre-buried grooves in the step 1, and locking and fixing vertical abutted seams between adjacent precast slabs through split bolts after assembly;

step 3, after the isolating layers are arranged on the upper end face and the side end face of the prefabricated slab, fixing the branch pipe gallery wall body and the top plate formwork by using a supporting frame;

step 4, binding steel bars of a top plate of the pipe gallery, and pouring concrete of the wall body and the top plate of the pipe gallery;

step 5, after concrete curing of the wall body of the pipe gallery is finished, removing the formwork, and fastening a water stop screw rod pre-embedded in the wall body after penetrating the water stop screw rod into a hole in the precast slab;

and 6, performing waterproof treatment on each joint and the assembly joint.

The water stop screw is a three-section water stop screw, the middle part of the three-section water stop screw is a steel bar water stop sheet, the end, close to the wall body, of the three-section water stop screw is connected with a sleeve for fixing an overhanging screw, and the overhanging screw is used for fixing the prefabricated plate and the wall body.

The water stopping screw is characterized in that an L-shaped notch is formed in one end of each prefabricated plate, prefabricated plate reserved grooves are formed in the other end, close to the two sides of the end portion, of the prefabricated plate, the two prefabricated plates which are spliced with each other are assembled in a matched mode through the two L-shaped notches to obtain a Z-shaped assembling seam, and the prefabricated plate reserved grooves are used for being fixed through nuts after penetrating through the water stopping screw.

And in the step 3, the isolating layer is made of geotextile or flexible material so as to isolate the precast slab from the subsequent poured concrete, so that the precast slab and the cast-in-place concrete are prevented from being poured together, and the follow-up precast slab is convenient to disassemble.

And 6, arranging water-swelling rubber water stop strips at assembly joints among the prefabricated plates and joints between the prefabricated plates and the pipe gallery wall in a waterproof treatment mode.

The quantity of stagnant water screw rod and split bolt is confirmed according to the inside size of piping lane.

When the built pipe gallery needs to be extended, all the locking nuts are loosened, the prefabricated plates are dismantled and lifted away from the site, and the bolt holes of the wall body are repaired.

The invention has the following advantages:

1. the temporary plugging can not cause the damage of the main body structure, and the cost is lower;

2. the reserved Z-shaped abutted seam indirectly prevents the infiltration of underground water during the manufacturing of the precast slab; the fixing mode that the three-section type water stopping screw rods pre-embedded in the wall of the pipe gallery penetrate through the grooves of the prefabricated plates is simple, and convenience is brought to later-stage dismantling inside the pipe gallery;

4. the water-swelling rubber water stop strips are arranged at the joints of the precast slabs and the gallery body, so that water leakage at two ends can be avoided;

5. the temporary plugging is carried out on the two ends of the previously built pipe gallery, the normal operation of the pipe gallery is not influenced, and the internal facilities of the pipe gallery are effectively protected;

6. when the built pipe gallery needs to be extended in the future, the nuts are loosened, and the prefabricated plates are detached, so that the method is simple and strong in implementation.

Drawings

FIG. 1 is a schematic cross-sectional structure of a pipe gallery;

FIG. 2 is a schematic view of the cross-sectional structure I-I in FIG. 1;

FIG. 3 is a partial detail view of FIG. 2 at blocking node A;

FIG. 4 is a schematic view of the cross-sectional structure II-II in FIG. 1;

FIG. 5 is a Z-shaped seam assembly thumbnail of a prefabricated slab;

wherein: 1-pipe gallery wall body; 2-pipe gallery top plate; 3-a pipe gallery bottom plate; 4-a nut; 5-water stopping screw rod; 6-preformed board reserving a groove; 7, precast slab; 8-split bolts; 9-side end faces; 10-water swelling rubber water stop strip; 11-an isolation layer; 12-water stop sheets; 13-upper end face; 14-Z type assembly seam.

Detailed Description

The technical solution of the present invention is further described in detail by the following embodiments with reference to the accompanying drawings, and as shown in fig. 1 to 5, a method for temporarily blocking a pipe gallery port of a bolt-fixed precast slab includes the following steps:

step 1, binding reinforcing steel bars of a pipe gallery wall body 1 after the pipe gallery bottom plate 3 is manufactured, reserving a groove on the wall body in the range of 200-300 mm inward of the end part to be plugged of the pipe gallery, and embedding a water stop screw 5;

step 2, hoisting a plurality of prepared precast dry concrete slabs 7 to the positions of the pre-buried grooves in the step 1, and locking and fixing vertical abutted seams between adjacent precast slabs through split bolts 8 after assembly;

step 3, after the isolating layers 11 are arranged on the upper end face 13 and the side end face 9 of the precast slab, the prefabricated slab assembled is fixed by the support frames through the templates of the branch pipe gallery wall body 1 and the pipe gallery top plate 2;

step 4, binding reinforcing steel bars of the top plate 2 of the pipe gallery, and pouring concrete of the wall 1 and the top plate of the pipe gallery;

step 5, after the concrete curing of the pipe gallery wall 1 is finished, removing the formwork, and fastening a water stop screw 5 pre-embedded in the wall after penetrating into a hole in a precast slab 7;

step 6, performing waterproof treatment on each joint and the splicing joint;

the water stop screw 5 is a three-section water stop screw, the middle part of the three-section water stop screw is a steel bar water stop sheet 12, the end of the three-section water stop screw close to the wall body is connected with a sleeve for fixing an overhanging screw, and the overhanging screw is used for fixing the precast slab 7.

An L-shaped notch is formed in one end of each prefabricated plate 7, prefabricated plate reserved grooves 6 are formed in the other end, close to the two sides of the end portion, of the prefabricated plate, the two prefabricated plates which are spliced with each other are assembled in a matched mode through the two L-shaped notches to obtain a Z-shaped assembling seam 14, and the prefabricated plate reserved grooves 6 are used for being fixed through nuts 4 after penetrating through water stop screws.

And in the step 3, the isolating layer 11 is made of geotextile or flexible material so as to isolate the precast slab from the subsequent poured concrete, so that the precast slab and the cast-in-place concrete are prevented from being poured together, and the follow-up precast slab is convenient to disassemble.

And 6, arranging water-swelling water stop strips 10 at joints between the prefabricated plates, the Z-shaped assembly joints 14 between the prefabricated plates, the prefabricated plates 7 and the pipe gallery wall 1 and between the upper end surfaces 13 of the prefabricated plates and the pipe gallery top plate 2.

When the built pipe gallery needs to be extended, all the locking nuts are loosened, the prefabricated plates are dismantled and lifted away from the site, and the bolt holes in the wall body are repaired.

The protective scope of the present invention is not limited to the above-described embodiments, and it is apparent that various modifications and variations can be made to the present invention by those skilled in the art without departing from the scope and spirit of the present invention. It is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. A temporary plugging method for a pipe gallery port of a bolt-fixed precast slab is characterized by comprising the following steps:

step 6, performing waterproof treatment on each joint and the splicing joint;

2. The method for temporarily blocking the pipe gallery port of the bolt-fixed precast slab as claimed in claim 1, wherein: the water stop screw is a three-section water stop screw, the middle part of the three-section water stop screw is a steel bar water stop sheet, the end, close to the wall body, of the three-section water stop screw is connected with a sleeve for fixing an overhanging screw, and the overhanging screw is used for fixing the prefabricated plate and the wall body.

3. The method for temporarily blocking the pipe gallery port of the bolt-fixed precast slab as claimed in claim 1, wherein: and in the step 3, the isolating layer is made of geotextile or flexible material so as to isolate the precast slab from the subsequent poured concrete, so that the precast slab and the cast-in-place concrete are prevented from being poured together, and the follow-up precast slab is convenient to disassemble.

4. The method for temporarily blocking the pipe gallery port of the bolt-fixed precast slab as claimed in claim 1, wherein: and 6, arranging water-swelling rubber water stop strips at assembly joints among the prefabricated plates and joints between the prefabricated plates and the pipe gallery wall in a waterproof treatment mode.

5. The method for temporarily blocking the pipe gallery port of the bolt-fixed precast slab as claimed in claim 1, wherein: the quantity of stagnant water screw rod and split bolt is confirmed according to the inside size of piping lane.

6. The method for temporarily blocking the pipe gallery port of the bolt-fixed precast slab as claimed in claim 1, wherein: when the built pipe gallery needs to be extended, all the locking nuts are loosened, the prefabricated plates are dismantled and lifted away from the site, and the bolt holes of the wall body are repaired.