CN115405759A - Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method - Google Patents
Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method Download PDFInfo
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- CN115405759A CN115405759A CN202211003322.2A CN202211003322A CN115405759A CN 115405759 A CN115405759 A CN 115405759A CN 202211003322 A CN202211003322 A CN 202211003322A CN 115405759 A CN115405759 A CN 115405759A
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- gas pipeline
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- pile foundation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/02—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets partly surrounding the pipes, cables or protective tubing
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
- F16L3/14—Hangers in the form of bands or chains
Abstract
The invention provides a pile foundation rotary-excavating hole-forming underground gas pipeline in-situ isolation protection system and a construction method. The device comprises a foundation pit groove body, and is characterized in that horizontal supporting beams are arranged on soil bodies on two sides of the foundation pit groove body, an upper cross beam is arranged on each horizontal supporting beam, the upper cross beam is connected with a lower cross beam through a vertical stand column, a limiting supporting block is arranged on the upper portion of the lower cross beam to fix a gas pipeline, a flexible hanging strip is arranged on each horizontal supporting beam to tighten and fix the gas pipeline, and a tension monitoring meter is arranged on each flexible hanging strip to monitor tension. The invention belongs to the field of civil engineering, and aims at a construction method of a pile foundation rotary-digging pore-forming underground gas pipeline in-situ isolation protection system structure, so that the engineering cost is effectively reduced, the construction speed is accelerated, and better technical and economic benefits can be obtained when the method is applied to actual engineering.
Description
Technical Field
The invention relates to the field of civil engineering, in particular to an in-situ isolation protection system for a pile foundation rotary-digging pore-forming underground gas pipeline and a construction method.
Background
Along with the rapid development and growth of urban scale and volume, urban traffic load is increasing day by day, and the application and utilization requirements of underground space are becoming more important, underground pipelines which are in use are often encountered in the process of pile foundation construction, a large number of municipal pipeline relocation is inevitably needed, when relocation is not needed, in-situ protection is adopted, but when in-situ gas-carrying support protection with large span is carried out on high-risk source pipelines such as secondary high-pressure gas and high-pressure gas pipes crossing the pile foundation hole site area, a plurality of procedures such as gas stopping, pressure reduction, gas discharging, connection, nitrogen replacement, pressurization, ventilation and the like are needed, the construction difficulty is higher, the risk is higher, and an absolutely safe and reliable construction method must be adopted to ensure the operation safety of the pipelines and the safety of peripheral life and property during construction.
Disclosure of Invention
The invention aims to provide an in-situ isolation protection system for an underground gas pipeline with a rotary-excavated hole formed in a pile foundation and a construction method.
In order to solve the technical problem, the invention provides a construction method of an in-situ isolation protection system of an underground gas pipeline by rotary drilling and hole forming of a pile foundation, which comprises the following steps:
step one, cleaning soil around a pipeline: cleaning soil around the gas pipeline by adopting a pipe periphery dragging type soil cleaning device, mounting a pipeline supporting beam at the lower part of the gas pipeline to support the gas pipeline, and protecting the gas pipeline by adopting a steel cover plate and a profile steel side mould;
step two, supporting a gas pipeline groove: in the process of gas pipeline excavation construction, a unit type supporting steel frame is adopted to support soil bodies on two sides of a groove through a steel supporting plate and a sand and stone backfill layer;
step three, constructing the side wall of the gas pipeline: adopting a sizing steel mould to carry out gas pipeline concrete side wall construction, wherein the upper parts of the sizing steel moulds at two sides are fixed through an upper ejector rod, and the lower parts of the sizing steel moulds at two sides are fixed through a lower ejector rod;
step four, protection construction of the gas pipeline: aiming at protecting the position of a rotary excavation pile foundation through a pipeline underneath type temporary stable hoisting support system, horizontal support beams are arranged on soil bodies on two sides of a foundation pit groove body, upper cross beams are arranged on the horizontal support beams, the upper cross beams are connected with lower cross beams through vertical upright posts, limiting support blocks are arranged on the upper portions of the lower cross beams to fix a gas pipeline, flexible hanging strips are arranged on the horizontal support beams to tighten and fix the gas pipeline, and tension monitoring meters are arranged on the flexible hanging strips to monitor tension; aiming at a gas pipeline crossing the foundation pit, a pipeline overhead type temporary stable hanging support system is adopted for protection;
step five, later-stage gas pipeline recovery: the gas pipeline groove is internally provided with a fine sand backfill body, the two sides of the gas pipeline are provided with grouting steel pipes for reinforcing soil bodies on the two sides of the pipeline, the periphery of the pipeline is provided with repeated grouting pipes for reinforcing the soil body on the periphery of the gas pipeline by circumferential grouting, the upper part of the gas pipeline groove is provided with a prefabricated cover plate, and the prefabricated cover plate of the gas pipeline is installed through a shaped hanging bracket.
The invention has the beneficial effects that:
(1) The pipeline underlying type temporary stable hoisting support system is adopted to provide protection for in-situ isolation of the underground gas pipeline for pile foundation rotary-digging hole forming, so that the construction efficiency is improved, and the construction safety is guaranteed;
(2) A pipeline overhead type temporary stable hanging support system is adopted to support and protect the gas pipeline crossing the foundation pit, so that the safety of the gas pipeline is improved;
(3) The soil body around the gas pipeline is cleaned by adopting a pipe periphery dragging type soil cleaning device, and the gas pipeline is protected by adopting a steel cover plate and a profile steel side mold, so that the construction efficiency and the safety of the gas pipeline protection are improved;
(4) The grouting steel pipes are arranged on two sides of the gas pipeline to reinforce soil bodies on two sides of the pipeline, the repeated grouting pipes are arranged on the periphery of the pipeline to perform annular grouting reinforcement on the soil body on the periphery of the gas pipeline, so that the settlement of the soil body on the periphery of the gas pipeline is reduced, and the overall safety of the gas pipeline is improved.
(5) The prefabricated cover plate of the gas pipeline is installed by the aid of the regularization hanging bracket, and installation construction efficiency of the prefabricated cover plate is improved.
Drawings
FIG. 1 is a structural diagram of an in-situ isolation protection system for an underground gas pipeline with a rotary digging hole of a pile foundation;
FIG. 2 is a sectional view of an in-situ isolation protection system for a rotary drilling hole-forming underground gas pipeline of a pile foundation;
FIG. 3 is a block diagram of a pipeline overhead temporary stability hanging bracket system;
FIG. 4 is a drawing type structure of the soil cleaning and protecting device around the pipe;
FIG. 5 is a tying diagram of an adjustable unit type steel frame temporary support body for excavating a foundation pit;
FIG. 6 is a structural diagram of a formwork system for synchronously casting the opposite-bracing type side wall;
FIG. 7 is a view of a structure of a pipe grouting pipe for symmetrical and synchronous grouting reinforcement;
fig. 8 is a structural view of the precast reinforced concrete cover plate hanging and falling device.
In the figure: 1, a gas pipeline; 2, a flexible sling; 3, a lower cross beam; 4, limiting a supporting block; 5, a foundation pit groove body; 6, rotary digging pile foundation; 7, soil mass; 8, horizontal supporting beams; 9, vertical upright posts; 10, an upper cross beam; 11, a tension monitor; 12, elevation monitoring points; 13, supporting the cross beam; 14, a travel sensor; 15, temporarily and stably hanging and placing a support system on the pipeline; 16, a bailey bracket; 17, steel pipe columns; 18, connecting the support beam; 19, a pipeline support beam; 20, a steel cover plate; 21, a steel scraper; 22, channel rail; 23, pulling the lifting ring; 24, dragging the soil cleaning device around the pipe; 25, walking the main beam; 26, a stroke adjustable boom; 27, a road wheel; 28, forming a profile steel side die; 29, a gravel backfill layer; 30, vertically positioning and supporting; 31, horizontal support; 32, supporting the steel frame in a unit mode; 33, adjustable jacking; 34, a steel supporting plate; 35, concrete sidewalls; 36, a lower ejector rod; 37, an upper ejector rod; 38, forming a steel die; 39, repeating the grouting pipe; 40, prefabricating a cover plate; 41, a gas pipeline groove; 42, fine sand backfilling; 43, grouting the steel pipe; 44, a hook; 45, an adjustable screw; 46, a bolt; 47, horizontally hoisting and conveying beams; 48, forming a hanger; 49, push-pull handles; 50, a wheel.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.
It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.
As shown in fig. 1 to 8, the invention provides a pile foundation rotary-digging pore-forming underground gas pipeline in-situ isolation protection system and a construction method, comprising the following steps:
firstly, cleaning a soil body 7 around a pipeline: cleaning soil bodies 7 around the gas pipeline 1 by adopting a pipe periphery dragging type soil cleaning device 24, mounting a pipeline supporting beam 19 at the lower part of the gas pipeline 1 to support the gas pipeline 1, and protecting the gas pipeline 1 by adopting a steel cover plate 20 and a profile steel side die 28;
wherein, steel cover plate 20 both sides all are connected with shaped steel side form 28 for steel cover plate 20 and the shaped steel side form 28 of both sides protect gas pipeline 1 in the intermediate position.
Step two, supporting the gas pipeline groove 41: during the excavation construction process of the gas pipeline 1. Supporting the soil bodies 7 on two sides of the groove by using a unit type supporting steel frame 32 through a steel supporting plate 34 and a sand backfill layer 29;
step three, constructing the side wall of the gas pipeline 1: adopting a shaped steel die 38 to construct the concrete side wall 35 of the gas pipeline 1, wherein the upper part of the shaped steel die 38 is fixed through an upper ejector rod 37, and the lower part of the shaped steel die 38 is fixed through a lower ejector rod 36;
step four, protection construction of the gas pipeline 1: aiming at protecting the position of a rotary excavation pile foundation 6 through a pipeline underneath type temporary stable hoisting support system, horizontal support beams 8 are arranged on soil bodies 7 on two sides of a foundation pit groove body 5, an upper cross beam 10 is arranged on each horizontal support beam 8, the upper cross beam 10 is connected with a lower cross beam 3 through a vertical upright post 9, a limiting support block 4 is arranged at the upper part of each lower cross beam 3 to fix a gas pipeline 1, a flexible hanging strip 2 is arranged on each horizontal support beam 8 to tighten and fix the gas pipeline 1, and a tension monitor 11 is arranged on each flexible hanging strip 2 to monitor tension; aiming at a gas pipeline 1 crossing a foundation pit, a pipeline overhead type temporary stable hoisting support system 15 is adopted for protection, steel pipe columns 17 are arranged at the lower part of the pipeline overhead type temporary stable hoisting support system 15, a connection support beam 18 is arranged between every two adjacent steel pipe columns 17 for fixation, a Bailey frame 16 is arranged at the tops of the steel pipe columns 17, a plurality of support cross beams 13 are arranged at the upper part of the Bailey frame 16, limit support blocks 4 are arranged at the upper parts of the support cross beams 13 for fixation of the gas pipeline 1, and a stroke sensor 14 is arranged between the gas pipeline 1 and the Bailey frame 16 for monitoring the position of the gas pipeline 1;
step five, later-stage gas pipeline 1 recovery: a fine sand backfill body 42 is arranged in a gas pipeline groove 41, grouting steel pipes 43 are arranged on two sides of a gas pipeline 1 to reinforce soil bodies 7 on two sides of the pipeline, a repeated grouting pipe 39 is arranged on the periphery of the pipeline to reinforce the soil bodies 7 on the periphery of the gas pipeline 1 in an annular grouting mode, and a prefabricated cover plate 40 is arranged on the upper portion of the gas pipeline groove 41. The prefabricated cover plate 40 of the gas pipe 1 is mounted by means of a shaped hanger 48.
The invention also discloses an in-situ isolation protection system for underground gas pipelines in rotary drilling of pile foundations, which comprises a gas pipeline 1, a horizontal support beam 8, an upper cross beam 10, a lower cross beam 3, a limit support block 4, a flexible suspender 2, a tension monitor 11, a vertical upright post 9, a foundation pit groove body 5, soil bodies 7 and a rotary drilling pile foundation 6, wherein the horizontal support beam 8 is arranged on the soil bodies 7 on two sides of the foundation pit groove body 5, the upper cross beam 10 is arranged on the horizontal support beam 8, the upper cross beam 10 is connected with the lower cross beam 3 through the vertical upright post 9, the limit support block 4 is arranged on the upper portion of the lower cross beam 3 to fix the gas pipeline 1, the flexible suspender 2 is arranged on the horizontal support beam 8 to tension and fix the gas pipeline 1, and the tension monitor 11 is arranged on the flexible suspender 2 to monitor the tension.
Specifically, be cross arrangement between horizontal support beam 8 and the entablature 10, make stable shelving of entablature 10 on horizontal support beam 8, entablature 10 both ends all are connected with vertical stand 9 simultaneously, and be connected with bottom end rail 3 through two at least vertical stands 9 at both ends, make entablature 10, vertical stand 9 and bottom end rail 3 connect the frame construction that forms similar rectangle, one side that spacing support block 4 is close to gas pipeline 1 simultaneously has the arc sunken, it is spacing to make gas pipeline 1 can receive the avris that the arc is sunken, increase gas pipeline 1's stability.
The tension monitor 11 is commercially available, and will not be described in detail herein.
As shown in fig. 3, the temporary stable hanging bracket system structure diagram of the pipeline overhead type is adopted, the gas pipeline 1 is fixed by adopting the temporary stable hanging bracket system 15 of the pipeline overhead type, the lower part of the temporary stable hanging bracket system 15 of the pipeline overhead type is provided with a steel pipe column 17, a contact supporting beam 18 is arranged between two adjacent steel pipe columns 17 for fixing, a bailey bracket 16 is arranged at the top of each steel pipe column 17, a plurality of supporting beams 13 are arranged on the upper part of the bailey bracket 16, a limiting supporting block 4 is arranged on the upper part of each supporting beam 13 for fixing the gas pipeline 1, and a stroke sensor 14 is arranged between the gas pipeline 1 and the bailey bracket 16 for monitoring the position of the gas pipeline 1.
Wherein, a plurality of supporting beam 13 are the mode setting that interval distribution is on bailey frame 16 upper portion, and a plurality of supporting beam 13 distribute along the length direction of gas pipeline 1, and stroke sensor adopts infrared sensor, laser sensor etc. simultaneously.
As shown in fig. 4, a structure diagram of a pipe periphery dragging type soil cleaning and protecting device is shown, a pipe periphery dragging type soil cleaning device 24 is adopted for cleaning the periphery of a gas pipeline 1, a pipeline supporting beam 19 is arranged at the lower part of the gas pipeline 1 for supporting, a steel cover plate 20 is arranged at the upper part of the gas pipeline 1 for protecting, a channel steel rail 22 is arranged at the upper part of a soil body 7, a walking main beam 25 is arranged at the upper part of the pipe periphery dragging type soil cleaning device 24, the walking main beam 25 is connected with a steel scraper 21 through a stroke adjustable suspender 26, dragging rings 23 are arranged at two ends of the walking main beam 25, walking wheels 27 corresponding to the channel steel rail 22 are rotatably arranged at two ends of the walking main beam 25, and the walking wheels 27 are moved on the channel steel rail 22 through the wire rope dragging type soil cleaning device 24 so that the stroke adjustable suspender 26 drives the steel scraper 21 to clean the periphery of the gas pipeline 1.
The adjustable-stroke hanger rod 26 is a connection structure with adjustable length, such as a threaded telescopic rod.
As shown in fig. 5, the temporary support structure for the adjustable unit steel frames for excavation includes a structure diagram, a unit support steel frame 32 is disposed in a gas pipeline trench 41, the unit support steel frame 32 includes steel support plates 34 disposed on two sides of the gas pipeline trench 41, soil bodies 7 on two sides of the gas pipeline trench 41 are supported by the steel support plates 34 and a gravel backfill layer 29, a pipeline support beam 19 is disposed on the lower portion of the gas pipeline 1, the unit support steel frame 32 further includes a horizontal support 31 and a vertical positioning support 30, and the steel support plates 34 are supported by two ends of the horizontal support 31 through adjustable top supports 33.
Specifically, support through horizontal support 31 between the steel brace board 34 of both sides links to each other and carry out the support of horizontal direction, vertical location props 30 simultaneously and wears to establish behind the trompil on horizontal support 31 and connect in gas pipeline 41 bottoms to guarantee horizontal support 31's stability, the both ends of horizontal support 31 are passed through adjustable top and are held in the palm 33 and connect and keep stable steel brace board 34 simultaneously.
Wherein, adjustable jacking 33 has screw thread extending structure to guarantee that adjustable jacking 33's length can adjust at certain extent.
As shown in fig. 6, in the structure diagram of the braced side wall synchronous casting formwork system, concrete is cast on the concrete side walls 35 at two sides of the gas pipeline 1 through the shaped steel moulds 38, and the upper parts of the shaped steel moulds 38 at two sides are fixed through the upper ejector rods 37; the lower parts of the two sizing steel dies 38 are fixed by the lower ejector rods 36.
Wherein, a T-shaped structure is formed between the two shaped steel dies 38.
As shown in fig. 7, the structure diagram of symmetrically and synchronously grouting and reinforcing the pipeline grouting pipes is that a fine sand backfill body 42 is arranged in a gas pipeline groove 41, grouting steel pipes 43 are arranged on two sides of a gas pipeline 1 to reinforce soil bodies 7 on two sides of the pipeline, a repeated grouting pipe 39 is arranged on the periphery of the pipeline to reinforce the soil bodies 7 on the periphery of the gas pipeline 1 by circumferential grouting, and a prefabricated cover plate 40 is arranged on the upper portion of the gas pipeline groove 41.
Specifically, grouting openings are formed in the circumferential sides of the grouting steel pipe 43 and the repeat grouting pipe 39, grouting overflows from the grouting openings in the grouting process, and after grouting is completed, the fine sand backfill body 42 is fixedly connected with the grouting steel pipe 43 and the repeat grouting pipe 39 through solidified grouting, so that the grouting steel pipe 43 and the repeat grouting pipe 39 reinforce the circumferential sides of the gas pipeline 1.
In particular, since the T-shaped structure is formed between the two shaped steel dies 38, when the prefabricated cover plate 40 is disposed on the upper portion of the gas pipeline groove 41, the two ends of the prefabricated cover plate 40 are covered on the step position of the T-shaped structure.
As shown in fig. 8, the structure of the precast reinforced concrete cover plate lifting and falling device is that the precast cover plate 40 of the gas pipeline 1 is installed by a regularization hanger 48, a horizontal lifting beam 47 is arranged at the front end of the regularization hanger 48, the horizontal lifting beam 47 is provided with a lifting hook 44 for lifting the precast cover plate 40, the lifting hook 44 is connected with the horizontal lifting beam 47 by an adjustable screw 45 and a bolt 46, wheels 50 are arranged in the middle of the regularization hanger 48, and a push-pull handle 49 is arranged at the rear end of the regularization hanger 48.
Specifically, the lifting hook 44 hooks the side of the prefabricated cover plate 40 to hoist the prefabricated cover plate, and meanwhile, an operator holds the push-pull handle 49 to push the wheel 50 to rotate, so that the prefabricated cover plate 40 is driven to move to a specified position, and then the prefabricated cover plate 40 is placed.
Particularly, after one end of the adjustable screw 45, which is far away from the lifting hook 44, penetrates through the horizontal lifting beam 47, the adjustable screw 45 is fixed on the horizontal lifting beam 47 through the bolt 46, and meanwhile, the adjustable screw 45 has a threaded telescopic structure so as to ensure that the length of the adjustable screw is adjustable.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as those of the present application, fall within the protection scope of the present invention.
Claims (9)
1. A pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method is characterized by comprising the following steps:
step one, cleaning soil around a pipeline: cleaning soil bodies (7) around the gas pipeline (1) by adopting a pipe periphery dragging type soil cleaning device (24), mounting a pipeline supporting beam (19) at the lower part of the gas pipeline (1) to support the gas pipeline (1), and protecting the gas pipeline (1) by adopting a steel cover plate (20) and a profile steel side mold (28);
step two, supporting a gas pipeline groove: in the excavation construction process of the gas pipeline (1), a unit type supporting steel frame (32) is adopted to support soil bodies (7) on two sides of a groove through a steel supporting plate (34) and a sandstone backfill layer (29);
step three, constructing the side wall of the gas pipeline: the method comprises the following steps that a setting steel die (38) is adopted to construct a concrete side wall (35) of a gas pipeline (1), the upper parts of the setting steel dies (38) on two sides are fixed through an upper ejector rod (37), and the lower parts of the setting steel dies (38) on two sides are fixed through a lower ejector rod (36);
step four, gas pipeline protection construction: aiming at protecting the position of a rotary excavation pile foundation (6) through a pipeline underneath type temporary stable hoisting support system, horizontal supporting beams (8) are arranged on soil bodies (7) on two sides of a foundation pit groove body (5), an upper cross beam (10) is arranged on each horizontal supporting beam (8), each upper cross beam (10) is connected with a corresponding lower cross beam (3) through a vertical upright post (9), a limiting supporting block (4) is arranged at the upper part of each lower cross beam (3) to fix a gas pipeline (1), a flexible hanging strip (2) is arranged on each horizontal supporting beam (8) to tighten and fix the gas pipeline (1), and a tension monitoring meter (11) is arranged on each flexible hanging strip (2) to monitor tension; aiming at a gas pipeline (1) crossing a foundation pit, a pipeline overhead type temporary stable hoisting support system (15) is adopted for protection;
step five, later-stage gas pipeline recovery: the fine sand backfill body (42) is arranged in the gas pipeline groove (41), grouting steel pipes (43) are arranged on two sides of the gas pipeline (1) to reinforce soil bodies (7) on two sides of the pipeline, repeated grouting pipes (39) are arranged on the periphery of the pipeline to perform annular grouting reinforcement on the soil bodies (7) on the periphery of the gas pipeline (1), a prefabricated cover plate (40) is arranged on the upper portion of the gas pipeline groove (41), and the prefabricated cover plate (40) of the gas pipeline (1) is installed through a stereotyped hanging bracket (48).
2. The pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method according to claim 1, characterized in that: the pipeline overhead type temporary stable hoisting support system (15) is provided with steel pipe columns (17) at the lower part, a connection supporting beam (18) is arranged between every two adjacent steel pipe columns (17) for fixing, a Bailey frame (16) is arranged at the top of each steel pipe column (17), a plurality of supporting cross beams (13) are arranged on the upper part of the Bailey frame (16), limit supporting blocks (4) are arranged on the upper parts of the supporting cross beams (13), and a stroke sensor (14) is arranged between a gas pipeline (1) and the Bailey frame (16).
3. The pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method according to claim 1, characterized in that: be the crisscross setting between horizontal support beam (8) and entablature (10), vertical stand (9) and bottom end rail (3) are connected and are formed rectangular frame structure, and one side that spacing supporting shoe (4) are close to gas pipeline (1) has the arc sunken.
4. The pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method according to claim 2, characterized in that: the plurality of supporting cross beams (13) are arranged on the upper portion of the Bailey frames (16) in an interval distribution mode, and the plurality of supporting cross beams (13) are distributed along the length direction of the gas pipeline (1).
5. The pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method according to claim 1, characterized in that: the upper portion of a soil body (7) is provided with a channel steel track (22), the upper portion of a pipe periphery dragging type soil cleaning device (24) is provided with a walking main cross beam (25), the walking main cross beam (25) is connected with a steel scraper (21) through a stroke adjustable suspender (26), two ends of the walking main cross beam (25) are provided with supporting and pulling rings (23), and the two ends of the walking main cross beam (25) are rotatably provided with walking wheels (27) corresponding to the channel steel track (22).
6. The pile foundation rotary excavating hole forming underground gas pipeline in-situ isolation protection system construction method according to claim 1, characterized in that: unit formula supports steelframe (32) is including locating steel brace board (34) of the inside both sides of gas pipeline slot (41), support gas pipeline slot (41) both sides soil body (7) through steel brace board (34) and grit backfill layer (29), gas pipeline (1) lower part sets up pipeline supporting beam (19), unit formula supports steelframe (32) and still includes that horizontal support (31) and vertical location prop (30), horizontal support (31) both ends are supported steel brace board (34) through adjustable top support (33).
7. The construction method of the in-situ isolation protection system for the underground gas pipeline formed by rotary drilling of the pile foundation according to claim 1, characterized by comprising the following steps: t-shaped structures are formed between the shaped steel moulds (38) on the two sides.
8. The construction method of the in-situ isolation protection system for the underground gas pipeline formed by rotary drilling of the pile foundation according to claim 1, characterized by comprising the following steps: regularization gallows (48) front end sets up horizontal handling roof beam (47), and horizontal handling roof beam (47) set up lifting hook (44) and hoist prefabricated apron (40), and lifting hook (44) are connected with horizontal handling roof beam (47) through adjustable screw rod (45) and bolt (46), and regularization gallows (48) middle part sets up wheel (50), and regularization gallows (48) rear end sets up push-and-pull handle (49).
9. The utility model provides a pore-forming underground gas pipeline normal position isolation protection system is dug soon to pile foundation which characterized in that: the protective system is obtained by the construction method of the pile foundation rotary excavating pore-forming underground gas pipeline in-situ isolation protection system according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211003322.2A CN115405759A (en) | 2022-08-19 | 2022-08-19 | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211003322.2A CN115405759A (en) | 2022-08-19 | 2022-08-19 | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method |
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| CN115405759A true CN115405759A (en) | 2022-11-29 |
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| CN202211003322.2A Pending CN115405759A (en) | 2022-08-19 | 2022-08-19 | Pile foundation rotary digging pore-forming underground gas pipeline in-situ isolation protection system and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789340A (en) * | 2023-02-13 | 2023-03-14 | 中铁十八局集团有限公司 | In-situ protection structure for pipeline migration and modification digital construction and construction method |
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2022
- 2022-08-19 CN CN202211003322.2A patent/CN115405759A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115789340A (en) * | 2023-02-13 | 2023-03-14 | 中铁十八局集团有限公司 | In-situ protection structure for pipeline migration and modification digital construction and construction method |
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