CN110541966A - pipe joint jacking auxiliary equipment in narrow space and using method thereof - Google Patents

Abstract

The invention discloses a pipe joint jacking auxiliary device in a narrow space and a use method thereof, wherein the auxiliary device is sleeved outside a pipe joint and is matched with a jacking pickaxe for use, the pipe joint jacking auxiliary device is of a groove body frame structure and comprises front jacking iron, rear jacking iron and a pull belt, the front jacking iron is sleeved on a pipe body section of the pipe joint and is arched and comprises an arch-shaped ring and a top plate welded on the outer sides of two arch feet of the arch-shaped ring, the plate surface of the top plate is perpendicular to the central axis of the pipe joint, the size of the arch-shaped ring is larger than that of the pipe joint, the rear jacking iron is sleeved on the rear end surface of the pipe joint and is annular, the size of the ring is matched with that of the rear side surface of the pipe joint, the two pull belts are arranged to be close to two sides of the pipe body section. The invention effectively reduces the size of the starting well in the pipe-jacking construction technology, obviously shortens the construction period while reducing the cost, and has the advantages of easily available manufacturing materials, simple manufacturing process, simple structure, portability, durability, convenient use, low cost, strong universality and popularization.

Description

Pipe joint jacking auxiliary equipment in narrow space and using method thereof

Technical Field

the invention relates to the field of pipe jacking construction, in particular to a pipe joint jacking auxiliary device in a narrow space and a using method thereof.

Background

With the technological innovation and the rapid development of economy, urban high-rise buildings continuously flood every corner of every large city, and countless underground comprehensive pipe network engineering works. The construction of various pipe networks brings great convenience to people in life. At present, the construction method of urban pipe network engineering evolves from original excavation construction to trenchless or trenchless construction, and the increasing construction method changes the appearance of the city, enables people to feel more comfortable and warm in the city, and greatly reduces economic loss caused by secondary excavation of the road surface. At present, the main construction methods for few excavation or no excavation in China comprise the following steps: firstly, manual pipe jacking construction; secondly, mechanical pipe jacking construction; and thirdly, shield construction, and the three construction methods have advantages and disadvantages respectively, wherein the three main modes have the advantages that traffic does not need to be blocked, and the interference to the traffic caused by underground construction is less, so that the construction period is greatly shortened, the construction noise pollution is reduced compared with excavation construction, and the environmental impact and harm caused by excavation of large-size foundation pits by an open excavation method and well point precipitation can be obviously reduced by a pipe jacking method. The manual pipe-jacking construction method is suitable for the construction of pipelines with large tunnel faces and large pipe diameters; the mechanical pipe jacking construction is suitable for the construction of pipelines with smaller pipe diameters; the shield construction method is generally applied to soft water-bearing stratum, has relatively homogeneous conditions, has certain application in construction of tunnels and the like, and requires enough burial depth, and the earthing depth is preferably less than 6 m. Based on the three trenchless or trenchless construction methods, different construction methods are adopted in different construction environments, the urban dense city and the construction geographical position are limited, and the size of the construction well is often limited by multiple factors in the pipe-jacking construction, so that the size of the construction well is further reduced on the basis of the prior art, and the method is particularly important for the application and popularization of the pipe-jacking technology. At present, the construction of jacking pipes in narrow spaces becomes an important content to be researched in the municipal industry. CN202082490U discloses a reverse push bench, which comprises a machine head, a rear seat, a main push oil pump and a concrete pipe, and its advantages are that it adopts the working method of reverse push, and can greatly reduce the size of the working well, but the reverse push bench has relatively complex structure, inconvenient manufacture, and an integrated combined structure, heavy equipment, and inconvenient construction in narrow underground space.

disclosure of Invention

the invention aims to provide a pipe joint jacking auxiliary device in a narrow space and a using method thereof, and solves the problems that effective construction in the narrow space is difficult or the manufacturing and popularization difficulty is high, the device is heavy in self weight, the construction is inconvenient and the like in the prior art.

in order to achieve the technical purpose, the invention adopts the following technical scheme:

a pipe joint jacking auxiliary device in a narrow space is sleeved outside a pipe joint and used in cooperation with a jacking pickaxe, and is of a groove body frame structure and comprises a front jacking iron, a rear jacking iron and a pull belt;

the front jacking iron sleeve is sleeved on the pipe body section of the pipe joint and is arched, the front jacking iron sleeve comprises an arch ring and a top plate welded on the outer sides of two arch feet of the arch ring, the plate surface of the top plate is perpendicular to the central axis of the pipe joint, and the size of the arch ring is larger than that of the pipe joint;

the rear jacking iron is sleeved on the rear end face of the pipe joint and is in a ring shape, and the size of the ring is matched with that of the rear side face of the pipe joint;

the drawstring has two, hugs closely the tube coupling pipe shaft body section both sides setting, and the front end welds in preceding top iron medial surface, and the rear end welds in back top iron lateral surface.

preferably, preceding top iron and the welding of stretching strap contact site have the bracket, the bracket level sets up, is the triangle-shaped form, and two limits weld respectively in roof upper edge and stretching strap lateral surface.

preferably, the length of the pull belt is matched with the initial length of the top pick.

Preferably, the outer side surface of the pull belt is correspondingly welded with a stiffening plate.

preferably, the top plate is welded to the rear side face of the arch-shaped ring arch springing and is flush with the rear side face of the arch-shaped ring, a plurality of stiffening ribs are uniformly welded between the front side face of the top plate and the outer side face of the arch-shaped ring arch springing, and the stiffening ribs are horizontally arranged and are in a right-angle triangle shape.

preferably, at least three stiffening ribs are welded to the front side of each top plate.

preferably, the top ends of the front top iron and the rear top iron are correspondingly welded with hanging rings.

preferably, the narrow space lower pipe joint jacking auxiliary equipment is welded by steel.

In addition, the invention also provides a use method of the pipe joint jacking auxiliary equipment in the narrow space, which comprises the following steps:

step one, equipment installation: a guide rail is erected in the starting well, a transverse iron rear seat is arranged on the rear wall, and a hydraulic oil cylinder top pickaxe is erected;

step two, hoisting a first pipe: hoisting the first section of pipe joint into a guide rail in the well through a hoisting device;

step three, hoisting and installing auxiliary equipment: hoisting auxiliary equipment into the well through a hoisting device, and installing the auxiliary equipment as a hoop outside a pipe joint;

step four, fine adjustment of equipment: adjusting the mounting position of the top pickaxe to ensure that the position of the top pickaxe is aligned with the position of the top plate, and ensuring that the acting point of the top pickaxe is positioned at the front-section top plate of the pipeline;

Step five, jacking the first pipe: jacking the pipe joint into the designed position of the soil body by means of the thrust of a jacking pick;

Step six, stopping jacking and retracting the jacking pickaxe: stopping jacking when the distance between the front jacking iron and the soil body is 10cm, and retracting the jacking pickaxe to the initial position;

Seventhly, lowering pipe joints and connecting pipes: removing the auxiliary equipment by means of the hoisting device, hoisting the next section of pipe joint, performing pipe connection processing on the butt joint position of the pipe joint, installing the auxiliary equipment on the newly hoisted pipe joint by means of the hoisting device, continuously jacking, and repeating the sixth step and the seventh step;

Step eight, jacking the front tail pipe: stopping jacking when the distance between the front jacking iron arranged on the last section of pipe joint and the soil body is 10 cm;

step nine, hanging out auxiliary equipment: dismantling the auxiliary equipment by means of a hoisting device and hoisting the auxiliary equipment out of the starting well;

Step ten, equipment adjustment: adjusting the position of the jacking pickaxe to the right rear part of the pipe joint;

eleven, jacking a tail pipe at the rear section: and adjusting the acting point of the jacking pick to the rear end of the last section of pipe joint, and jacking the last part of pipe joint into the soil body.

step twelve, dismantling equipment: and sequentially dismantling the equipment in the starting well according to the safety construction specification.

compared with the prior art, the invention has the technical advantages that:

1. The acting point of the top pickaxe is moved forwards from the rear end of the pipe joint, so that the top pickaxe and the pipe joint are installed side by side in the transverse direction, the excavation size of the starting well is reduced, the well forming cost is greatly saved, the land acquisition area is reduced, and the construction period is obviously shortened;

2. the manufacturing material is easy to obtain, the manufacturing process is simple, the practical value is high, and the popularization is strong;

3. Simple structure, light and durable, convenient use and strong universality.

drawings

The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:

FIG. 1 is a schematic structural view of a pipe section jacking auxiliary device in a narrow space according to the present invention;

FIG. 2 is a schematic view of an installation system of a pipe joint jacking auxiliary device in a narrow space according to the present invention;

Fig. 3 is a schematic view of an installation system of the existing pipe jacking technology.

Reference numerals: 1-front top iron, 1.1-arch ring, 1.2-top plate, 1.3-stiffening rib, 2-rear top iron, 3-drawstring, 3.1-stiffening plate, 4-bracket, 5-lifting ring, 6-top pickaxe and 7-pipe joint.

Detailed Description

Hereinafter, an embodiment of a narrow space pipe joint jacking assisting apparatus and a method of using the same according to the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.

In the description of the present invention, it should be noted that the terms "front", "back", "inside", "outside", "top", "bottom", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

the drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.

The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-3:

As shown in fig. 1-2, the preferable auxiliary device for pushing the lower pipe joint in a narrow space is sleeved outside a concrete pipe joint 7 with an external radius of 40cm, is used in cooperation with a push pick 6, has a groove frame structure, and is formed by welding a Q235 steel material, and comprises a front push iron 1, a rear push iron 2 and a pull belt 3;

The front top iron 1 is sleeved on a pipe body section of the pipe joint 7 and is arched, and comprises an arch ring 1.1 and a top plate 1.2 welded on the outer sides of two arch feet of the arch ring 1.1, the arch ring 1.1 is formed by cutting and processing annular top iron with the inner radius of 62.5cm and the thickness of 10cm, the height of the arch ring 1.1 is 112cm after cutting, the size of the inner space of the front top iron 1 is slightly larger than that of the pipe joint 7, so that the installation and the removal of equipment are convenient, the top plate 1.2 is welded on the rear side surface of the arch foot of the arch ring 1.1 and is flush with the rear side surface of the arch ring 1.1, the plate surface of the top plate is vertical to the central axis of the pipe joint 7, three stiffening ribs 1.3 are uniformly welded between the front side surface of the top plate 1.2 and the outer side surface of the arch foot of the arch ring 1.1, the stiffening ribs 1.3 are horizontally arranged and are in a right-angle triangle;

the rear jacking iron 2 is sleeved on the rear end face of the pipe joint 7, is annular, is made of annular jacking iron with the inner radius of 40cm and the thickness of 10cm, has the same size as the outer diameter of the pipe joint 7, can be tightly attached to the outer wall of the pipe joint 7 after being installed, and carries out limiting protection on the pipe joint 7 so as to ensure that the pipe joint 7 is stable and does not shake in the jacking process;

the two drawstrings 3 are made of steel plates of 222cm × 59cm × 2cm, the drawstrings are arranged to be tightly attached to two sides of a pipe body section of a pipe joint 7, the front ends of the drawstrings are welded to the inner side surface of a front top iron 1, the rear ends of the drawstrings are welded to the outer side surface of a rear top iron 2, two welding seams are uniformly arranged between each drawstring 3 and the front top iron 1 and between each drawstring 3 and the rear top iron 2, the welding electrodes are 502 welding electrodes, the length of each welding seam is not less than 10cm, the thickness of each welding seam is not less than 2cm, slag inclusion welding is prohibited in gaps between each drawstring 3 and the front top iron 1 and between each drawstring 3 and the rear top iron 2 in the welding process, in order to ensure the stability of the drawstring 3, strength and welding seam strength are checked on the design size of the drawstring, the jacking resistance Fp =1452KN of the jacking pick 6, the sectional area of the drawstring 3 is A, therefore, the sectional tensile stress of the drawstring 3 is Fp/(2A) =1452KN/(0.02, the strength value of the welding seam under the material is 490MPa, and the tensile force that each welding seam can bear is 490MPa × 0.1m × 0.02m =980KN >363KN, so both the drawstring 3 and the strength of the welding seam meet the requirements;

in order to further enhance the tensile strength of the drawstring 3 and the stability of the top plate 1.2, a bracket 4 is welded at the contact part of the front top iron 1 and the drawstring 3, the bracket 4 is horizontally arranged, is a triangular steel plate and has the thickness of 2cm, two edges are respectively welded at the upper edge of the top plate 1.2 and the outer side surface of the drawstring 3, and meanwhile, a rectangular stiffening plate 3.1 is correspondingly welded at the outer side surface of the drawstring 3;

in order to conveniently hoist the equipment by the hoisting device, the hoisting rings 5 are correspondingly welded at the top ends of the front top iron 1 and the rear top iron 2.

the use method of the pipe section jacking auxiliary equipment in the narrow space comprises the following steps:

Step one, equipment installation: a guide rail is erected in the starting well, a transverse iron rear seat is arranged on the rear wall, and a hydraulic oil cylinder top pickaxe 6 is erected on the rear wall;

step two, hoisting a first pipe: hoisting the first section of pipe joint 7 into a guide rail in the well through a hoisting device;

Step three, hoisting and installing auxiliary equipment: hoisting the auxiliary equipment into the well by a hoisting device, and installing the auxiliary equipment as a hoop outside the pipe joint 7;

Step four, fine adjustment of equipment: adjusting the mounting position of the top pickaxe 6 to ensure that the top pickaxe 6 is aligned with the top plate 1.2, and ensuring that the acting point of the top pickaxe 6 is positioned at the top plate 1.2 at the front section of the pipeline;

Step five, jacking the first pipe: pushing the pipe joint 7 into the designed position of the soil body by means of the thrust of the pushing pick 6;

Step six, stopping jacking and retracting the jacking pickaxe: stopping jacking when the front jacking iron 1 is 10cm away from the soil body, and retracting the jacking pickaxe to the initial position;

Seventhly, lowering pipe joints and connecting pipes: removing the auxiliary equipment by means of the hoisting device, hoisting the next section of pipe joint 7, performing pipe connection processing on the butt joint position of the pipe joint 7, installing the auxiliary equipment on the newly hoisted pipe joint 7 by means of the hoisting device, continuously jacking, and repeating the sixth step and the seventh step;

step eight, jacking the front tail pipe: when the distance between the front jacking iron 1 arranged on the last section of pipe joint 7 and the soil body is 10cm, stopping jacking;

Step nine, hanging out auxiliary equipment: dismantling the auxiliary equipment by means of a hoisting device and hoisting the auxiliary equipment out of the starting well;

step ten, equipment adjustment: adjusting the position of the top pickaxe 6 to the right back of the pipe joint 7, as shown in fig. 3;

eleven, jacking a tail pipe at the rear section: the acting point of the top pickaxe 6 is adjusted to the rear end of the last section of pipe joint 7, and the last part of pipe joint 7 is pushed into the soil body.

step twelve, dismantling equipment: and sequentially dismantling the equipment in the starting well according to the safety construction specification.

It should be noted that the above-mentioned method of use is only described with respect to the related procedures involving auxiliary equipment, and other related operations (such as tunneling, unearthing, mud lubrication, deviation correction, etc.) are consistent with the methods of operation in the conventional art and are not listed in detail in the above description.

the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. The utility model provides a pipe joint jacking auxiliary assembly under narrow and small space, the cover is located pipe joint (7) outside, and cooperation top pick (6) use, its characterized in that: the structure is a groove body frame structure and comprises a front top iron (1), a rear top iron (2) and a pull belt (3);

the front top iron (1) is sleeved on the pipe body section of the pipe joint (7) and is arched, the front top iron comprises an arch ring (1.1) and a top plate (1.2) welded on the outer sides of two arch feet of the arch ring (1.1), the plate surface of the top plate (1.2) is perpendicular to the central axis of the pipe joint (7), and the size of the arch ring (1.1) is larger than that of the pipe joint (7);

The rear top iron (2) is sleeved on the rear end face of the pipe joint (7) and is annular, and the size of the annular is matched with that of the rear side face of the pipe joint (7);

the drawstring (3) has two, hugs closely the tube coupling (7) pipe shaft section both sides setting, and the front end welds in preceding top iron (1) medial surface, and the rear end welds in back top iron (2) lateral surface.

2. The narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: preceding top iron (1) and stretching strap (3) contact site welding have bracket (4), bracket (4) level sets up, is the triangle-shaped form, and two limits weld respectively in roof (1.2) top edge and stretching strap (3) lateral surface.

3. the narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: the length of the pull belt (3) is matched with the initial length of the push pick (6).

4. The narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: and the outer side surface of the pull belt (3) is correspondingly welded with a stiffening plate (3.1).

5. The narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: roof (1.2) weld in the trailing flank of arch-shaped ring (1.1) arch springing, with arch-shaped ring (1.1) trailing flank parallel and level, evenly weld a plurality of stiffening ribs (1.3) between roof (1.2) leading flank and the lateral surface of arch-shaped ring (1.1) arch springing, stiffening rib (1.3) level setting is right angle triangle-shaped.

6. the narrow space pipe joint jacking auxiliary equipment as claimed in claim 5, wherein: at least three stiffening ribs (1.3) are welded on the front side surface of each top plate (1.2).

7. The narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: the top ends of the front top iron (1) and the rear top iron (2) are correspondingly welded with hanging rings (5).

8. The narrow space pipe joint jacking auxiliary device as claimed in claim 1, wherein: the pipe joint jacking auxiliary equipment is welded by steel in the narrow space.

9. the use method of the pipe joint jacking auxiliary equipment in the narrow space according to any one of claims 1 to 8, characterized by comprising the following steps:

step one, equipment installation: a guide rail is erected in the starting well, a transverse iron rear seat is arranged on the rear wall, and a hydraulic oil cylinder jack (6) is erected;

Step two, hoisting a first pipe: hoisting the first section of pipe joint (7) into a guide rail in the well through a hoisting device;

Step three, hoisting and installing auxiliary equipment: hoisting the auxiliary equipment into the well through a hoisting device, and installing the auxiliary equipment as a hoop outside the pipe joint (7);

step four, fine adjustment of equipment: adjusting the mounting position of the top pickaxe (6), and aligning the position of the top pickaxe (6) with the position of the top plate (1.2) to ensure that the acting point of the top pickaxe (6) is positioned at the position of the top plate (1.2) at the front section of the pipeline;

Step five, jacking the first pipe: pushing the pipe joint (7) into the designed position of the soil body by means of the thrust of the pushing pick (6);

Step six, stopping jacking and retracting the jacking pickaxe: when the front jacking iron (1) is 10cm away from the soil body, stopping jacking, and retracting the jacking pickaxe to the initial position;

seventhly, lowering pipe joints and connecting pipes: removing the auxiliary equipment by means of the hoisting device, hoisting the next section of pipe joint (7), performing pipe connection processing on the butt joint position of the pipe joint (7), installing the auxiliary equipment on the newly hoisted pipe joint (7) by means of the hoisting device, continuously jacking, and repeating the sixth step and the seventh step;

step eight, jacking the front tail pipe: when the front jacking iron (1) arranged on the last section of pipe joint (7) is 10cm away from the soil body, stopping jacking;

step nine, hanging out auxiliary equipment: dismantling the auxiliary equipment by means of a hoisting device and hoisting the auxiliary equipment out of the starting well;

step ten, equipment adjustment: adjusting the position of the top pickaxe (6) to the right back of the pipe joint (7);

eleven, jacking a tail pipe at the rear section: the acting point of the top pickaxe (6) is adjusted to the rear end of the last section of pipe joint (7), and the last part of pipe joint (7) is pushed into the soil body;

step twelve, dismantling equipment: and sequentially dismantling the equipment in the starting well according to the safety construction specification.