CN220433669U

CN220433669U - Tube group in-situ suspension protection structure

Info

Publication number: CN220433669U
Application number: CN202321719934.1U
Authority: CN
Inventors: 陈超; 杜勇; 陈心龙
Original assignee: MCC Wukan Engineering Technology Co Ltd
Current assignee: MCC Wukan Engineering Technology Co Ltd
Priority date: 2023-07-03
Filing date: 2023-07-03
Publication date: 2024-02-02
Anticipated expiration: 2033-07-03

Abstract

The utility model provides a tube group in-situ suspension protection structure. The protection structure comprises two groups of support frames symmetrically arranged on the outer side of the foundation pit and a suspension bracket erected between the two groups of support frames, and each group of support frames comprises at least two upright posts and a cap beam connected with the tops of the at least two upright posts; the hanger comprises longitudinal beams arranged above hat beams of two groups of supporting frames, an upper cross beam arranged above the longitudinal beams, a lower cross beam arranged below a tube group and a lifting rope connected with the upper cross beam and the lower cross beam, wherein two ends of the longitudinal beams are respectively fixed on the hat beams of the two groups of supporting frames, the upper cross beams are provided with a plurality of pieces and are vertically arranged above the longitudinal beams, the lower cross beams are matched with the upper cross beams in number and are arranged parallel to the upper cross beams, and two ends of each upper cross beam are respectively fixedly connected with two ends of the corresponding lower cross beam through the lifting rope. The utility model can effectively support the in-situ pipe group encapsulated by reinforced concrete, can realize excavation construction below the pipeline without changing the pipeline, and meets the safety of each section of the suspension pipe group.

Description

Tube group in-situ suspension protection structure

Technical Field

The utility model belongs to the fields of municipal engineering, underground space engineering and the like, in particular to the technical field of pipeline suspension protection, and particularly relates to an in-situ suspension protection structure of reinforced concrete pipe groups.

Background

In some areas with better surrounding environment and geological conditions, municipal pipeline or box culvert construction is often directly excavated by slope releasing and has no vertical supporting structure, but shallow foundation pit longitudinal excavation often encounters important pipelines or barriers to cross foundation pits, when partial pipelines such as high-voltage power, national defense optical cables and the like cannot be temporarily changed due to other reasons, the important pipelines or barriers need to be protected in situ, the pipelines or barriers need to be excavated under consideration, therefore, the pipelines or barriers which cannot be shifted need to be temporarily suspended by adopting a supporting structure, and the original pipelines or barriers are restored to the foundation stress under after the structures under the pipelines are backfilled.

The prior art mainly comprises the steps of temporarily transferring a pipeline affecting excavation of a foundation pit to the outside of the foundation pit, returning after the structural engineering in the foundation pit is completed, and carrying out in-situ suspension protection on the pipeline which cannot be temporarily transferred by a part of construction technology, wherein the prior suspension technology is mainly used for large-scale deep foundation pits with vertical supporting systems, and the prior supporting systems of the foundation pit such as lattice columns or concrete crown beams are used as suspension supports, so that the prior supporting stress systems of the foundation pit can be adversely affected, and the general suspension system is mainly composed of a bailey frame and steel beams, so that the structure is complex, and the construction difficulty is high.

Aiming at the conditions that municipal pipelines or box culverts in some areas with good surrounding environment and geological conditions are usually excavated by slope laying and no vertical supporting structure is adopted, an independent vertical supporting system is established outside a foundation pit, no influence is caused on foundation pit load and safety, meanwhile, aiming at reinforced concrete encapsulation pipe groups or similar obstacles, under the conditions that the pipe groups are not migrated and protective layers are not damaged, a simple steel frame suspension structure is adopted, a suspension protection structure is formed by the suspension rope with adjustable tension and the vertical supporting system and the like, so that the pipeline in-situ protection problem in the foundation pit without vertical supporting is solved under the condition of slope laying excavation, and meanwhile, the technology adopts a simple suspension protection structure, and has the advantages of obvious technical improvement, cost saving and simplicity and convenience in construction compared with the conventional bailey frame and other structures, and has obvious popularization and application values.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, provides a pipe group in-situ suspension protection structure, can solve the problem of pipeline protection that important pipelines cannot be migrated in underground foundation pit construction without vertical support, and has simple construction operation and obvious technical and economic benefits.

In order to achieve the technical effects, the utility model provides a tube group in-situ suspension protection structure, which is used for in-situ protection of a tube group in a foundation pit, wherein the protection structure comprises two groups of support frames arranged outside the foundation pit and suspension frames positioned in the foundation pit, the two groups of support frames are symmetrically arranged on two sides of the foundation pit, and the suspension frames are erected between the two groups of support frames; each group of supporting frames comprises at least two upright posts and a cap beam connected with the tops of the at least two upright posts; the hanger comprises longitudinal beams arranged above hat beams of two groups of supporting frames, an upper cross beam arranged above the longitudinal beams, a lower cross beam arranged below a tube group and a lifting rope connected with the upper cross beam and the lower cross beam, wherein two ends of the longitudinal beams are respectively fixed on the hat beams of the two groups of supporting frames, the upper cross beams are provided with a plurality of pieces and are vertically arranged above the longitudinal beams, the lower cross beams are matched with the upper cross beams in number and are arranged parallel to the upper cross beams, and two ends of each upper cross beam are respectively fixedly connected with two ends of the corresponding lower cross beam through the lifting rope.

The utility model has the preferable technical scheme that: the lifting ropes are steel wire ropes, the upper end and the lower end of each lifting rope are fixedly connected with the upper cross beam and the lower cross beam through positioning pieces respectively, and each lifting rope is provided with a telescopic adjusting component.

The utility model has the preferable technical scheme that: the longitudinal beams are provided with a plurality of parallel tube groups which are arranged continuously, and two ends of each longitudinal beam are fixed above the hat beams; the vertical tube groups of the plurality of upper cross beams are arranged above the longitudinal beams at equal intervals, the vertical tube groups of the plurality of lower cross beams are arranged below the tube groups at equal intervals, and the tube groups are suspended on the upper end surfaces of the lower cross beams through hanging ropes.

The utility model has the preferable technical scheme that: the pipe group is positioned above a structure, the structure is a municipal planned pipeline or box culvert, the underground water level of the foundation pit is below the structure, the foundation pit is excavated by slope laying, no vertical supporting system is adopted, the pipe group is wrapped by reinforced concrete, and the cross section of the pipe group is square.

The utility model has the preferable technical scheme that: each group of supporting frames is provided with two upright posts which are distributed on two sides of the tube group, the connecting lines of the two upright posts of the same group are vertical to the tube group, and the connecting lines of the upright posts of the same side of the two groups of supporting frames are parallel to the tube group; the stand is thick-wall steel pipe column, through mechanical pressing in the soil, the space that surpasses ground part in the stand adopts concrete to pack closely knit to at steel pipe column up end fixed square steel sheet as the cap, be used for fixed mounting cap roof beam.

The utility model has the preferable technical scheme that: the upright post is positioned outside the foundation pit by at least 1m.

The utility model has the preferable technical scheme that: the telescopic adjusting component is an adjustable flower basket bolt, the joint of the lifting rope and the telescopic adjusting component is fixed by adopting a U-shaped buckle, and the telescopic adjusting component rotates to adjust the length of the lifting rope through the bolt.

The utility model has the preferable technical scheme that: the locating piece is welded and fixed with the end face of the cross beam by 2 thread steel bars and is used for vertically locating the lifting rope and preventing the lifting rope from sliding.

The utility model has the preferable technical scheme that: the cap beam of each group of support frames is formed by combining 2I 63c I-shaped steel, and is fixed on the column cap of the upper end face of the column, and the I-shaped steel is welded and fixed with the column cap of the column; the longitudinal beam is an I45a I-steel combination.

The beneficial effects of the utility model are as follows:

aiming at municipal pipeline or box culvert construction in some areas with good surrounding environment and geological conditions, the utility model directly adopts slope excavation and has no vertical supporting structure, an independent vertical supporting system is established outside the foundation pit, no influence is generated on the load and safety of the foundation pit, meanwhile, the pipeline in situ protection problem of the foundation pit without vertical supporting is solved under the condition of not migrating the pipeline group or similar obstacles and not damaging a protective layer by a simple steel frame suspension structure and arranging a lifting rope with adjustable tension, and the lifting rope and the vertical supporting system and the like form a suspension protection structure. Meanwhile, compared with the conventional bailey frame and other structures, the technology has the advantages of obvious technical improvement, cost saving and simple construction, and has obvious popularization and application values.

Drawings

FIG. 1 is a schematic plan view of the present utility model;

FIG. 2 is a schematic longitudinal cross-sectional view of the present utility model;

FIG. 3 is a schematic cross-sectional view of the present utility model;

FIG. 4 is a detailed view of a lifting rope according to the present utility model;

FIG. 5 is a schematic view of a positioning member according to the present utility model.

In the figure: 1-upright post, 2-cap beam, 3-longitudinal beam, 4-upper cross beam, 5-lifting rope, 6-lower cross beam, 7-positioning piece, 8-tube group, 9-telescopic adjusting component, 10-structure and 11-foundation pit.

Detailed Description

The technical solution of the present utility model will be described in detail below with reference to the attached drawings and specific embodiments, wherein all other embodiments obtained by a person skilled in the art without making any inventive effort are within the scope of the present utility model.

The embodiment provides a pipe group in-situ suspension protection structure, as shown in fig. 1 to 3, wherein the protection structure is used for in-situ protection of the pipe group in a foundation pit, the pipe group 8 is positioned above a structure 10, the structure 10 is a municipal planned pipeline or box culvert and is positioned in a foundation pit 11, the burying depth is within 5m, the foundation pit 11 is excavated by slope laying completely, no vertical support system is adopted, the pipe group 8 is wrapped by reinforced concrete, the cross section is square, and the pipe group cannot be temporarily displaced in an ectopic manner due to other reasons, so that the in-situ protection is carried out by adopting the protection structure. The protection structure comprises a support frame arranged on the outer side of the foundation pit 11 and a suspension bracket arranged in the foundation pit, wherein the support frame is provided with two groups and is symmetrically arranged on two sides of the foundation pit 11, and the suspension bracket is arranged between the two groups of support frames; each group of supporting frames comprises two upright posts 1 and a cap beam 2 connected with the tops of at least two upright posts 1, and the upright posts 1 are positioned outside the foundation pit 11 by at least 1m; each group of supporting frames is provided with two upright posts 1, the two upright posts are distributed on two sides of the tube group 8, the connecting lines of the two upright posts in the same group are vertical to the tube group 8, and the connecting lines of the upright posts on the same side of the two groups of supporting frames are parallel to the tube group 8; the upright column 1 is a thick-wall steel pipe column, and is mechanically pressed into soil, gaps of the part, exceeding the ground, in the upright column 1 are densely filled with C30 concrete, and square steel plates with the thickness of 20mm are fixed on the upper end face of the steel pipe column to serve as column caps for fixedly mounting cap beams 2; the cap beam 2 of each group of support frames is formed by combining 2I 63c I-shaped steel, and is fixed on the column cap of the upper end face of the column 1, and the I-shaped steel is welded and fixed with the column cap of the column 1.

The in-situ hanging protection structure for the pipe group is provided by the embodiment, as shown in fig. 1 to 3, the hanging frame comprises a longitudinal beam 3, an upper cross beam 4, a lower cross beam 6 and a hanging rope 5, wherein the longitudinal beam 3 is erected above cap beams 2 of two groups of supporting frames, the upper cross beam 4 is positioned above the longitudinal beam 3, the lower cross beam 6 is positioned below the pipe group 8, the hanging rope 5 is connected with the upper cross beam and the lower cross beam, the longitudinal beam 3 is composed of I-steel with the thickness of I45a@100mm, a plurality of parallel pipe groups 8 are arranged continuously, and two ends of each longitudinal beam 3 are fixed on the cap beams 2 of the two groups of supporting frames; the upper cross beams 4 are provided with a plurality of upper cross beams, the upper cross beams are vertically arranged above the longitudinal beams 3, the lower cross beams 6 are matched with the upper cross beams 4 in number and are arranged parallel to the upper cross beams 4, and two ends of each upper cross beam 4 are fixedly connected with two ends of the corresponding lower cross beam 6 through hanging ropes 5 respectively. As shown in fig. 3 and fig. 4, the lifting ropes 5 are steel wires, the upper end and the lower end of each lifting rope 5 are respectively fixedly connected with the upper beam 4 and the lower beam 6 through positioning pieces 7, a telescopic adjusting member 9 is arranged on each lifting rope 5, the telescopic adjusting member 9 is an adjustable basket bolt, the connection part of the lifting rope 5 and the telescopic adjusting member 9 is fixed by adopting a U-shaped buckle, and the telescopic adjusting member 9 rotates through the bolt to adjust the length of the lifting rope 5. The locating piece 7 is fixed by 2 screw-thread steel bars with 16mm and the end face of the cross beam in a welded mode, can vertically locate the lifting rope 5, can prevent the lifting rope 5 from sliding at the same time, and can be used as a deformation monitoring point of a pipe group suspension structure.

The upper cross beams 4 and the lower cross beams 6 are combined by [22b@60 channel steel, a plurality of upper cross beams 4 are arranged above the longitudinal beams 3 at equal intervals in a vertical tube group 8, a plurality of lower cross beams 6 are arranged below the tube group 8 at equal intervals in a vertical tube group 8, and the tube group 8 is suspended on the upper end face of the lower cross beam 6 through a lifting rope 5.

The construction process of the utility model is further described below with reference to a specific embodiment, in which the current situation 26-hole reinforced concrete of the project encapsulates a 110kv electric power pipe group to cross a 7m x 2m rainwater box culvert foundation pit to be constructed, the upper part of the box culvert is affected by the incapability of migrating by the electric power pipe group, and the high-voltage electric power pipe group needs to be subjected to in-situ suspension protection before the rainwater box culvert foundation pit is excavated, so that the stability and safety of the electric power pipe group are ensured, and the specific construction process is as follows:

s1: the accurate position and elevation of the pipe group 8 are detected, dug and measured, the load condition of the pipe group 8 is analyzed, the suspension structure design is carried out, the technical scheme of excavation of the structure 10 and suspension of the pipe group 8 is defined, and related steel components are processed in advance.

S2: before the structure 10 below the pipe group 8 is excavated, 4 steel pipe columns 1 with the thickness of 500mm and the wall thickness of 10mm are constructed, the steel pipe piles are friction piles, the pile length is 10m, thick-wall steel pipe columns are mechanically pressed into the soil, gaps, exceeding the ground, in the columns 1 are filled with C30 concrete tightly, and square steel plates with the thickness of 20mm are fixed on the upper end faces of the steel pipe columns to serve as column caps.

S3: double I63c I-steel is placed on the upper end face of the upright post 1 and fixedly connected to form a cap beam 2, I45a I-steel is longitudinally and equidistantly distributed above the cap beam 2 to form a longitudinal beam 3, and [22b@60 channel steel is transversely and equidistantly distributed above the longitudinal beam 3 to form an upper cross beam 4, and each group of upper cross beams 4 and the longitudinal beam 3 are welded and fixed.

S4: soil body right below the pipe group 8 is kept not to excavate, 2m range earthwork on two sides of the pipe group 8 is excavated only in a layered mode until the earthwork on two sides excavates 30cm below the bottom surface of the pipe group 8 structure, manual transverse excavation square holes are adopted at the bottom of the structure right below the pipe group 8, the holes are sequentially excavated according to the position of the lower cross beam 6, the size of the holes is enough to ensure that the lower cross beam 6 can be horizontally inserted into the holes, local deformation damage of the pipe group 8 caused by overlarge excavation holes is avoided, and then [22b@60 channel steel is sequentially placed in the excavated holes to serve as the lower cross beam 6.

S5: the lower end of each group of lifting ropes 5 is fixed in a positioning piece 7 on the lower end face of the lower cross beam 6, and then the upper end of each group of lifting ropes 5 is fixed in a positioning piece 7 on the upper end face of the upper cross beam 4, so that all the lifting ropes 5 are in place in sequence.

S6: and (3) adjusting the position and the length of each group of lifting ropes 5 to ensure that the lifting ropes 5 are fully stressed vertically, and simultaneously, the upper end face of the lower cross beam 6 is tightly contacted with the lower end face of the pipe group 8 so as to ensure that the suspension structure system effectively bears the whole load of the pipe group 8.

S7: after the suspension structure system is effectively established, the earthwork right below the pipe group 8 is dug manually through the cooperation of a small machine, meanwhile, the settlement deformation condition of the pipe group 8 is observed through a measuring instrument, and the length of the telescopic adjusting member 9 and the tension of the lifting rope 5 are timely adjusted according to monitoring data.

S8: after the construction of the structure 10 right below the pipe group 8 is completed, the space right below the pipe group 8 is subjected to earth backfill and compaction treatment until the pipe group 8 can fully bear load by the backfill material below, then the suspension protection structure is removed in sequence, the lengths of the telescopic adjusting members 9 of each group are firstly adjusted, the lifting ropes 5 of each group are unloaded and removed, and then the upper cross beam 4, the longitudinal beam 3 and the cap beam 2 are removed in sequence.

S9: the lower beam 6 is removed, the lower beam 6 is sequentially pulled out one by one, and fine stone concrete is immediately used for filling the channel steel gaps of the lower beam 6 during pulling out.

S10: dismantling the upright column 1, manually chiseling concrete in the steel pipe column above the ground by adopting a pneumatic pick, then pulling out the steel pipe pile through hydraulic machinery, immediately backfilling gaps around the steel pipe pile by adopting medium coarse sand or fine stone concrete after the steel pipe pile is pulled out, and finally recycling the dismantled steel members.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a piping crowd normal position hangs protection architecture, protection architecture is used for carrying out normal position protection to the piping crowd in the foundation ditch, its characterized in that: the protection structure comprises two groups of supporting frames arranged on the outer side of the foundation pit (11) and hanging frames positioned in the foundation pit, wherein the two groups of supporting frames are symmetrically arranged on two sides of the foundation pit (11), and the hanging frames are arranged between the two groups of supporting frames; each group of supporting frames comprises at least two upright posts (1) and a cap beam (2) connected with the tops of the at least two upright posts (1); the suspension frame comprises longitudinal beams (3) arranged above cap beams (2) of two groups of support frames, upper cross beams (4) arranged above the longitudinal beams (3), lower cross beams (6) arranged below a tube group (8) and lifting ropes (5) connected with the upper cross beams and the lower cross beams, two ends of the longitudinal beams (3) are respectively fixed on the cap beams (2) of the two groups of support frames, the upper cross beams (4) are provided with a plurality of vertical arrangement above the longitudinal beams (3), the lower cross beams (6) are matched with the upper cross beams (4) in number and are arranged parallel to the upper cross beams (4), and two ends of each upper cross beam (4) are respectively fixedly connected with two ends of the corresponding lower cross beams (6) through the lifting ropes (5).

2. The tube farm in-situ suspension protection structure according to claim 1, wherein: the lifting ropes (5) are steel wire ropes, the upper end and the lower end of each lifting rope (5) are fixedly connected with the upper cross beam (4) and the lower cross beam (6) through positioning pieces (7), and a telescopic adjusting component (9) is arranged on each lifting rope (5).

3. A tube farm in-situ suspension protection structure according to claim 1 or 2, wherein: the longitudinal beams (3) are provided with a plurality of parallel tube groups (8) which are arranged continuously, and two ends of each longitudinal beam (3) are fixed above the hat beams (2); the vertical tube groups (8) of the plurality of upper cross beams (4) are arranged above the longitudinal beams (3) at equal intervals, the vertical tube groups (8) of the plurality of lower cross beams (6) are arranged below the tube groups (8) at equal intervals, and the tube groups (8) are suspended on the upper end surfaces of the lower cross beams (6) through the lifting ropes (5).

4. A tube farm in-situ suspension protection structure according to claim 1 or 2, wherein: the pipe cluster (8) is located above a structure (10), the structure (10) is a municipal planned pipeline or box culvert, the underground water level of a foundation pit (11) is below the structure (10), the foundation pit (11) is excavated by slope laying, no vertical supporting system exists, the pipe cluster (8) is wrapped by reinforced concrete, and the cross section of the pipe cluster is square.

5. A tube farm in-situ suspension protection structure according to claim 1 or 2, wherein: each group of supporting frames is provided with two upright posts (1), the two upright posts are distributed on two sides of the tube group (8), the connecting lines of the two upright posts of the same group are vertical to the tube group (8), and the connecting lines of the upright posts of the same group on the same side of the two groups of supporting frames are parallel to the tube group (8); the upright post (1) is a thick-wall steel pipe column, and is mechanically pressed into the soil, gaps of the part, exceeding the ground, in the upright post (1) are densely filled with concrete, square steel plates are fixed on the upper end face of the steel pipe column to serve as column caps, and the steel pipe column is used for fixedly mounting cap beams (2).

6. A tube farm in-situ suspension protection structure according to claim 1 or 2, wherein: the upright post (1) is positioned outside the foundation pit (11) by at least 1m.

7. The tube farm in-situ suspension protection structure according to claim 2, wherein: the telescopic adjusting member (9) is an adjustable basket bolt, the joint of the lifting rope (5) and the telescopic adjusting member (9) is fixed by adopting a U-shaped buckle, and the telescopic adjusting member (9) rotates through the bolt to adjust the length of the lifting rope (5).

8. The tube farm in-situ suspension protection structure according to claim 2, wherein: the locating piece (7) is welded and fixed with the end face of the cross beam through 2 thread steel bars and is used for vertically locating the lifting rope (5) and preventing the lifting rope (5) from sliding.

9. The tube farm in-situ suspension protection structure according to claim 4, wherein: the cap beams (2) of each group of support frames are formed by combining 2I 63c I-shaped steel, and are fixed on the column caps of the upper end surfaces of the columns (1), and the I-shaped steel is welded and fixed with the column caps of the columns (1); the longitudinal beam (3) is an I45a I-steel combination.