CN109058583B

CN109058583B - Tool pipe for hand-digging type pipe jacking construction

Info

Publication number: CN109058583B
Application number: CN201811005514.0A
Authority: CN
Inventors: 钟晟; 蒋欢; 罗兴斌; 王勇; 叶洪兵; 李红伟; 高世伟
Original assignee: China Metallurgical Construction Engineering Group Co Ltd
Current assignee: China Metallurgical Construction Engineering Group Co Ltd
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2020-12-22
Anticipated expiration: 2038-08-30
Also published as: CN109058583A

Abstract

The invention discloses a hand-digging pipe-jacking construction tool pipe, which comprises a pipe body transversely arranged in an operating state, wherein one end of the pipe body is a cutting edge end for cutting into a soil layer; the device is characterized in that a hydraulic jacking and extending mechanism arranged along the axial direction and a plate-shaped top cover are further mounted at the top of the inner side of the pipe body, the top cover is positioned at the edge end and is slidably mounted on the inner wall of the pipe body through a guide rail mechanism arranged along the axial direction of the pipe body; the telescopic end of the hydraulic jacking mechanism faces the cutting edge end and is connected to the top cover, so that the top cover can extend out of or retract into the pipe body along with the telescopic end; and one side of the top cover facing outwards is a cutting edge capable of cutting into a soil layer. The invention has the advantages of reasonable structural design, convenient operation and use, effective collapse prevention, operation safety improvement and the like.

Description

Tool pipe for hand-digging type pipe jacking construction

Technical Field

The invention relates to the technical field of building construction, in particular to a tool pipe for hand-digging type pipe jacking construction.

Background

With the continuous and stable growth of economy in China, the urbanization process is further accelerated, the demand of underground pipelines in China is increased year by year, and the traditional excavation construction method cannot be applied under many conditions. Since municipal pipelines are often laid in dense-population and bustling urban areas, various municipal pipelines such as water supply and drainage, electric power, communication, gas and heat, underground structures and structures exist around the pipelines, the traditional excavation method can affect the traffic and pollute the environment, has larger potential safety hazards and brings inconvenience to the life of citizens. Pipe jacking construction is implemented in China for years as a trenchless construction technology, and through years of development, the pipe jacking technology is applied to a large number of practical projects in China and keeps a high-speed growth trend. But in the current stage, except that mechanical pipe jacking is mostly adopted in east coastal cities, other areas are still in a relatively original stage, and a large amount of manual digging type pipe jacking construction technology is adopted.

The manual digging type pipe jacking construction technology is a construction technology that the rock soil of a working surface in front of a pipe is manually excavated and matched with a hydraulic jack for jacking, the technology has great limitation on different geological conditions, the phenomenon of collapse is easily caused because the earth pressure of the jacking surface cannot be balanced, and meanwhile, the operation environment is severe, various emergency situations are frequently encountered, and the safety of operation personnel cannot be effectively guaranteed. When the collapse quantity is too large, the pavement is easy to subside, the hidden trouble of driving is caused, the later punching and concrete pouring are carried out, and the road repairing cost is high.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a tool pipe for digging type pipe jacking construction with reasonable structural design, convenient operation and use, effective collapse prevention and improved operation safety.

In order to solve the technical problems, the invention adopts the following technical scheme:

a tool pipe for digging type pipe jacking construction comprises a pipe body which is transversely arranged in an operating state, wherein one end of the pipe body is a cutting edge end for cutting into a soil layer; the device is characterized in that a hydraulic jacking and extending mechanism arranged along the axial direction and a plate-shaped top cover are further mounted at the top of the inner side of the pipe body, the top cover is positioned at the edge end and is slidably mounted on the inner wall of the pipe body through a guide rail mechanism arranged along the axial direction of the pipe body; the telescopic end of the hydraulic jacking mechanism faces the cutting edge end and is connected to the top cover, so that the top cover can extend out of or retract into the pipe body along with the telescopic end; and one side of the top cover facing outwards is a cutting edge capable of cutting into a soil layer.

By adopting the structure, during construction, the whole tool pipe can be firstly jacked forwards to the front working face of the pipe, then the hydraulic jacking mechanism in the pipe body is utilized to jack the top cover towards the front working face of the pipe, so that the outward cutting edge of the top cover is cut into the soil layer of the front working face of the pipe as far as possible, and then a worker is organized to carry out excavation construction on rock soil of the front working face of the pipe. Because the workman is under construction, the top cap has inserted in the soil layer, forms the visor for after the soil layer excavation of top cap below, the soil layer of top cap top also should not collapse, both can ensure constructor's safety, can avoid the settlement that the collapse arouses again, saves the drilling and irritates concrete and the road repair expense in later stage, reduces construction cost, can improve the efficiency of construction again.

Furthermore, the whole top cap is arc-shaped, the outer diameter of the top cap is matched with the inner diameter of the pipe body, and the top cap is coaxially arranged in the pipe body.

Like this for the inner wall of body can be laminated to the top cap as far as possible, thereby reduce the occupation to body inner space, for the workman provides bigger operating space, convenient construction. In addition, the top cover is arranged to be arc-shaped, so that the bending strength of the extended top cover in the vertical direction can be increased, the deformation is prevented, and the service life is prolonged.

Furthermore, the guide rail mechanism is provided with two, is located respectively top cap ascending both sides in week.

Like this, guide rail mechanism can provide the holding power to the top cap from the both sides of top cap for the atress of top cap is more even, has and can avoid guide rail mechanism unbalance loading and damage, is favorable to improving guide rail mechanism's life.

Furthermore, two supporting blocks are welded on the inner wall of the pipe body and are respectively positioned on two sides of the top cover in the circumferential direction and close to the position of the cutting edge end; one side of the supporting block facing the top cover is provided with a supporting groove for the top cover to pass through; the length of the top cover is larger than the maximum extending length of the hydraulic jacking mechanism.

Because the length of the top cover is greater than the maximum extension length of the hydraulic jacking mechanism, even if the telescopic end of the hydraulic jacking mechanism is completely extended out, a part of the top cover is still positioned in the pipe body; and because the supporting blocks at the two sides of the top cover are positioned at the positions close to the edge opening end, when the extending part of the top cover is pressed downwards, the two supporting blocks and the other end of the top cover form a lever structure, thereby ensuring the balance of the top cover. And the supporting block is utilized to support the top cover, so that the acting force applied to the guide rail mechanism can be reduced, and the service life of the guide rail mechanism is prolonged.

Further, the guide rail mechanism is a steel rail welded on the inner wall of the pipe body along the axial direction of the pipe body; the two steel rails are provided with guide grooves which are arranged in a penetrating mode along the length direction on one side opposite to the circumferential direction of the pipe body, the width of each guide groove is consistent with the thickness of the top cover, and two sides of the top cover in the circumferential direction are respectively matched in the guide grooves.

In the structure, only one steel rail with the guide groove is adopted as the guide rail mechanism, the structure is simplified to the maximum extent on the premise of meeting the telescopic moving requirement of the top cover, and once the top cover is damaged, only the top cover needs to be replaced independently, so that the fault caused by the complex structure can be avoided, the maintenance is convenient, and the cost can be saved.

Furthermore, the top cover comprises a crosspiece in an arc shape and a plurality of drill rods welded on the crosspiece side by side along the circumferential direction of the crosspiece, one end of each drill rod, facing the cutting edge end, is provided with a conical drill bit, and the drill bits of the drill rods form the cutting edge of the top cover; and the telescopic end of the hydraulic jacking mechanism is connected to the crosspiece.

Because the drill rod has better intensity in the axial direction, and the conical drill bit is smaller in contact area with the soil layer, and is easier to insert into the soil layer, the top cover is formed by welding a plurality of drill rods and the crosspiece, so that the cutting edge of the top cover is sharper. In addition, the telescopic end is connected to the crosspiece, so that the acting force of the hydraulic jacking mechanism can be uniformly applied to each drill rod.

Furthermore, the crosspiece is provided with a plurality ofly along the length direction of the borer pole.

Thus, the overall strength of the top cover can be further improved.

Furthermore, the drill rod is provided with a connecting hole which is consistent with the end surface shape of the crosspiece in a penetrating mode in the radial direction, and the crosspiece penetrates through the connecting hole of the drill rod and is welded on the drill rod.

Therefore, the crosspiece can be positioned in the middle of the drill rod, and the situation that the insertion depth of the drill rod is influenced due to the fact that the crosspiece is exposed is avoided. And the crosspiece penetrates through the connecting hole and then is welded with the drill rod, so that the length of a welding seam between the crosspiece and the drill rod can be increased, and the welding strength of the crosspiece and the drill rod is improved.

Further, the distance between two adjacent drill rods is less than 8 mm.

Thus, a small gap is reserved between two adjacent drill rods, so that the soil layer above the drill rods can be prevented from collapsing, and the number of the drill rods can be reduced.

Furthermore, one end of the drill rod, which faces the cutting edge end, is provided with a threaded hole which is coaxially arranged, one end of the drill bit, which faces the drill rod, is provided with a screw rod matched with the threaded hole, and the drill bit is detachably arranged on the threaded hole of the drill rod through the screw rod.

Therefore, once the drill bit is damaged in the using process, the drill bit can be replaced at any time, and the maintenance is convenient.

In conclusion, the invention has the advantages of reasonable structural design, convenient operation and use, effective collapse prevention, operation safety improvement and the like.

Drawings

Fig. 1 is a schematic structural view of the tool tube in an extended state.

Fig. 2 is a schematic bottom view of fig. 1.

Fig. 3 is a schematic structural diagram of the top cover.

Fig. 4 is a schematic sectional view of the tool tube.

Detailed Description

The present invention will be described in further detail with reference to examples.

In the specific implementation: as shown in fig. 1 to 4, a hand-driving pipe-jacking construction tool pipe comprises a pipe body 1 transversely arranged in an operating state, wherein one end of the pipe body 1 is a cutting edge end for cutting into a soil layer; the top of the inner side of the pipe body 1 is also provided with a hydraulic jacking mechanism 2 arranged along the axial direction and a plate-shaped top cover 3, the top cover 3 is positioned at the edge end and is slidably arranged on the inner wall of the pipe body 1 through a guide rail mechanism 4 arranged along the axial direction of the pipe body; the telescopic end of the hydraulic jacking mechanism 2 faces the cutting edge end and is connected to the top cover 3, so that the top cover 3 can extend out of or retract into the pipe body 1 along with the telescopic end; the outward side of the top cover 3 is a cutting edge capable of cutting into a soil layer.

When in implementation, the whole top cover 3 is arc-shaped, the outer diameter of the top cover is matched with the inner diameter of the pipe body 1, and the top cover 3 is coaxially arranged in the pipe body 1.

In implementation, the two guide rail mechanisms 4 are respectively located at two sides of the top cover 3 in the circumferential direction.

During implementation, two supporting blocks 5 are further welded on the inner wall of the pipe body 1, and the two supporting blocks 5 are respectively located on two sides of the top cover 3 in the circumferential direction and are close to the position of the cutting edge end; one side of the supporting block 5 facing the top cover 3 is provided with a supporting groove for the top cover 3 to pass through; the length of the top cover 3 is larger than the maximum extending length of the hydraulic jacking mechanism 2.

In implementation, the guide rail mechanism 4 is a steel rail welded on the inner wall of the pipe body 1 along the axial direction of the pipe body 1; two the rail along the opposite one side of body 1 circumference has along length direction through arrangement's guide way, the width of guide way is unanimous with the thickness of top cap 3, the ascending both sides in top cap 3 circumference respectively the cooperation in the guide way.

In practice, the top cover 3 comprises a crosspiece 31 in the shape of a circular arc and a plurality of drill rods 32 welded to the crosspiece 31 side by side along the circumference of the crosspiece, one end of each drill rod 32 facing the cutting edge end is provided with a conical drill bit, and the drill bits of the plurality of drill rods 32 form the cutting edge of the top cover 3; the telescopic end of the hydraulic jacking mechanism 2 is connected to the crosspiece 31.

During specific implementation, the top cover can be formed by stamping or integral casting of the steel plate.

In practice, the crosspiece 31 is provided in plurality along the length of the shank 32.

Thus, the overall strength of the top cover can be further improved.

In practice, the drill rod 32 is provided with a connecting hole which is penetrated in the radial direction and has the same shape as the end surface of the crosspiece 31, and the crosspiece 31 penetrates through the connecting hole of the drill rod 32 and is welded on the drill rod 32.

In practice, the distance between two adjacent drill rods 32 is less than 8 mm.

In practice, the end of the drill rod 32 facing the cutting edge end is provided with a coaxially arranged threaded hole, the end of the drill bit facing the drill rod 32 is provided with a screw rod matched with the threaded hole, and the drill bit is detachably arranged on the threaded hole of the drill rod 32 through the screw rod.

In the implementation, the drill bit is made of 40 MnMoV.

In practice, the maximum diameter of the drill bit is 2-3 mm larger than the maximum diameter of the drill rod 32.

Thus, after the drill bit is inserted into the soil layer, a hole with a diameter slightly larger than that of the drill rod is formed, and the drill rod is prevented from being in direct contact with the hole to increase the insertion resistance of the top cover.

In practice, the axial projection of the drill rod 32 is square, and the connecting holes are arranged in a penetrating manner along the diagonal direction of the square.

Because the drill rod is required to be extruded along the radial direction in the process of inserting the drill rod into the soil layer, compared with a cylindrical drill rod, the rectangular drill rod has the advantages that the soil layer is extruded to be smaller, and the reaction force of the soil layer to the drill rod is smaller, so that the drill rod can be smoothly inserted into the soil layer.

In practice, the crosspiece 31 comprises a main crosspiece located at the end of the drill rod 32 and an auxiliary crosspiece located in the middle of the drill rod 32, the main crosspiece and the drill rod 32 have the same size in the thickness direction of the top cover 3, and the telescopic end of the hydraulic jacking mechanism 2 is connected to the main crosspiece; the shape of the connecting hole is consistent with that of the end face of the auxiliary crosspiece, and the auxiliary crosspiece penetrates through the connecting hole; the size of the auxiliary crosspiece in the thickness direction of the top cover 3 is 3-5 mm, and the auxiliary crosspiece gradually becomes smaller into a wedge shape along the direction towards the drill bit.

The auxiliary crosspieces in the structure are wedge-shaped, so that the insertion resistance can be reduced.

When the hydraulic jacking and extending mechanism 2 is implemented, the hydraulic jacking and extending mechanism comprises a hydraulic cylinder arranged along the axial direction of the pipe body 1, and a piston rod of the hydraulic cylinder is connected to the top cover 3.

The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A tool pipe for digging type pipe jacking construction comprises a pipe body (1) which is transversely arranged in an operating state, wherein one end of the pipe body (1) is a cutting edge end for cutting into a soil layer; the device is characterized in that a hydraulic jacking mechanism (2) arranged along the axial direction and a plate-shaped top cover (3) are further mounted at the top of the inner side of the pipe body (1), the top cover (3) is positioned at the edge end and can be slidably mounted on the inner wall of the pipe body (1) through a guide rail mechanism (4) arranged along the axial direction of the pipe body; the telescopic end of the hydraulic jacking mechanism (2) faces the cutting edge end and is connected to the top cover (3), so that the top cover (3) can extend out of or retract into the pipe body (1) along with the telescopic end; the outward side of the top cover (3) is a cutting edge capable of cutting into a soil layer, the top cover (3) is integrally arc-shaped, the outer diameter of the top cover is matched with the inner diameter of the pipe body (1), and the top cover (3) is coaxially arranged in the pipe body (1);

the top cover (3) comprises a circular arc-shaped crosspiece (31) and a plurality of drill rods (32) welded on the crosspiece (31) side by side along the circumferential direction of the crosspiece, one end, facing the cutting edge end, of each drill rod (32) is provided with a conical drill bit, and the drill bits of the drill rods (32) form the cutting edge of the top cover (3); the telescopic end of the hydraulic jacking mechanism (2) is connected to the crosspiece (31).

2. The pipe as claimed in claim 1, wherein said two rail mechanisms (4) are provided at both sides of said top cover (3) in the circumferential direction.

3. The pipe of claim 1, wherein the inner wall of the pipe body (1) is welded with two support blocks (5), and the two support blocks (5) are respectively located at two sides of the top cover (3) in the circumferential direction and are close to the edge opening end; one side of the supporting block (5) facing the top cover (3) is provided with a supporting groove for the top cover (3) to pass through; the length of the top cover (3) is larger than the maximum extending length of the hydraulic jacking mechanism (2).

4. The pipe-jacking working tool pipe as claimed in claim 2, wherein said rail means (4) is a rail welded to the inner wall of said pipe body (1) in the axial direction of said pipe body (1); two the rail along the opposite one side of body (1) circumference has along length direction through arrangement's guide way, the width of guide way is unanimous with top cap (3)'s thickness, top cap (3) ascending both sides in circumference respectively the cooperation in the guide way.

5. The pipe-jacking working tool pipe according to claim 1, wherein a plurality of said crosspieces (31) are provided along the length direction of said drill rod (32).

6. The pipe as claimed in claim 4, wherein the shank (32) is provided with coupling holes formed therethrough in a radial direction to conform to the shape of the end surface of the crosspiece (31), and the crosspiece (31) is coupled to the shank (32) by passing through the coupling holes of the shank (32).

7. The pipe of claim 4, wherein the distance between two adjacent drill rods (32) is less than 8 mm.

8. A pipe as claimed in claim 4, wherein said shank (32) has a coaxially disposed threaded bore at an end thereof facing said nose end, and said bit has a threaded shank at an end thereof facing said shank (32) for mating with said threaded bore, said bit being removably mounted to said threaded bore of said shank (32) by said threaded shank.