Nodular cast iron jacking pipe and using method thereof

Abstract

The invention discloses a nodular cast iron jacking pipe and a using method thereof, and relates to the technical field of water supply and drainage pipelines, the nodular cast iron jacking pipe comprises a connecting pipe and a relay pipe, the connecting pipe is connected with the relay pipe in an inserted mode, and a protective sleeve is connected to the seam of the connecting pipe and the relay pipe in a sleeved mode; the using method comprises the following steps that S1, the connecting pipe is hoisted; s2, a pushing ring is hoisted; s3, the connecting pipe is pushed; s4, the pushing ring is hoisted away; s5, installing a relay pipe; s6, the pushing ring is hoisted again; s7, pushing a relay pipe; s8, a jacking pipe is installed for jacking; s9, carrying out relay jacking; and S10, repeating the steps S1 to S9. According to the nodular cast iron jacking pipe and the using method thereof, the jack is installed at the joint of the relay pipe and the connecting pipe, meanwhile, the outer surface of the joint is sleeved with the protective sleeve, a relay room in pipe jacking operation is formed, waste recycling is achieved, cost is reduced, and efficiency is improved; in the pipe jacking construction process, the requirement for a construction site is low by adopting a segmented jacking mode, rapid construction is facilitated, and the construction cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of water supply and drainage pipes, and in particular to a ductile iron jacking pipe and a use method thereof. Background Art

[0002] With the implementation of the national urbanization strategy, the construction and renovation of infrastructure such as water supply pipe networks are being carried out all over the country. Due to the dense population, high land acquisition and demolition costs, and serious traffic congestion and environmental damage caused by excavation of the road surface, the jacking construction technology can achieve trenchless underground pipe laying without affecting the ground buildings. Ductile iron jacking pipes are widely used due to a series of significant social and economic benefits such as no damage to the environment, long service life, short construction period, low comprehensive cost, and convenient and quick installation, and have become the preferred pipe material for jacking construction.

[0003] At present, ductile iron jacking pipe is one of the existing trenchless jacking products. It contacts the load-bearing parts of the socket through the plug-in interface, thereby utilizing the jacking force transmission structure composed of the load-bearing parts and the socket structure to realize the jacking construction of the jacking pipe; however, with the development of the times and the rapid urbanization process, the 6-meter-long ductile iron jacking pipe requires a large working well area, which is generally difficult to meet on the construction site.

[0004] In addition, when producing non-standard length ductile iron jacking pipes, it is necessary to cut a 6-meter-long (generally the production length is 6 meters) jacking pipe into 2-meter-4-meter jacking pipes to make jacking pipes with sockets. The remaining short sections of jacking pipes without sockets are stored for a long time and cannot be used or recycled, resulting in increased casting costs and reduced profits.

[0005] How to develop a ductile iron jacking pipe and its use method, which can not only adapt to the construction site environment, but also recycle the short sections of the ductile iron jacking pipe to reduce costs and increase efficiency, has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0006] The purpose of the present invention is to provide a ductile iron jacking pipe and a method of using the same to solve the problems listed in the background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] The invention discloses a ductile iron jacking pipe, comprising a connecting pipe and a relay pipe. The connecting pipe is plugged with the relay pipe, and a protective sleeve is sleeved at the joint between the connecting pipe and the relay pipe.

[0009] Preferably, sockets are fixedly installed at the openings at both ends of the connecting pipe, and the sockets are truncated cone-shaped.

[0010] Preferably, two groups of first thrust flanges are fixedly installed at equal intervals on the outer circumferential surface of the relay pipe, and thrust reinforcement ribs are fixedly installed between the opposite surfaces of the two groups of the first thrust flanges.

[0011] Preferably, a concrete layer is coated between the opposite surfaces of the receiving interface and the opposite surfaces of the first thrust flange;

[0012] A guide groove is provided on the concrete layer on the outer peripheral surface of the relay pipe.

[0013] Preferably, the inner diameter of the protective sleeve is equal to the outer diameter of the concrete layer on the outer peripheral surface of the relay pipe.

[0014] Preferably, a second push flange is fixedly mounted on the inner wall of the opening at one end of the protection sleeve, and the second push flange corresponds to the first push flange;

[0015] A jack is fixedly installed between the first thrust flange and the second thrust flange.

[0016] Preferably, it further comprises guide tubes, which are installed at equal intervals on the inner wall of the protective sleeve, and the positions of the guide tubes and the guide grooves are matched.

[0017] A method for using a ductile iron jacking pipe comprises the following steps:

[0018] S1. Hoist the connecting pipe, push the jacking pipe into the soil layer to a predetermined distance, place the connecting pipe on the guide rail through a special hoist, and adjust the axis of the connecting pipe to keep it consistent with the axis of the jacking pipe;

[0019] S2. Hoist the push ring and place the push ring on the guide rail at one end of the connecting pipe away from the mirror wall by using a crane;

[0020] S3, the connecting pipe is pushed up, and the pipe jacking machine fixed on the back wall works, by pushing up the pushing ring, so that the pushing ring pushes the connecting pipe to slide on the guide rail and abut against the plug interface of the jacking pipe in the pipeline;

[0021] S4, lift off the push ring, make the connecting pipe contact with the plug interface of the push pipe, push the connecting pipe into the mirror wall, and then lift the push ring off the guide rail by a crane;

[0022] S5. Install the relay pipe. Use a special lifting device to hang the relay pipe with the protective sleeve and jack installed on the guide rail, and adjust the axis of the relay pipe so that the axis of the relay pipe and the connecting pipe are in the same straight line;

[0023] S6. Hoist the push ring again and use a crane to hoist the push ring to the end of the relay pipe where the protective sleeve is not installed;

[0024] S7, jacking the relay pipe, the jacking machine fixed on the back wall works, and the relay pipe is jacked through the jacking ring, and further, the jacking ring pushes the relay pipe to slide on the guide rail and abut against the receiving interface of the connecting pipe, and the jacking pipe inside the soil layer is jacked;

[0025] S8, installing the jacking pipe for jacking, installing the jacking pipe on the guide rail, placing the jacking ring, and using the jacking machine fixed on the back wall to abut the receiving interface of the jacking pipe with the plug interface of the relay pipe, and pushing the jacking pipe into the soil layer;

[0026] S9, relay jacking, after the connecting pipe and the relay pipe are jacked into the soil layer for a predetermined distance, the pipe jacking machine fixed on the back wall does not shrink and continues to work. At this time, the jack entering the soil layer works, and the jack drives the protective sleeve to jack the connecting pipe. Further, the jacking operation is performed on the jacking pipe in the forward direction of the connecting pipe;

[0027] S10, repeat steps S1-S9 until the jacking pipe and the machine head are pushed out from the mirror wall at the other end.

[0028] Preferably, in step S9, after the jacking operation inside the soil layer is completed, the pipe jacking machine is retracted, the jacking pipe or connecting pipe, relay pipe is hoisted according to the design requirements, and the jacking operation is continued. When the pipe jacking machine is performing the jacking operation, the jack inside the soil layer is synchronously retracted.

[0029] Preferably, in step S9, the telescopic distances of multiple jacks on the relay pipe are controlled by data feedback from the measuring device to achieve deviation correction during the jacking process of the jacking pipe.

[0030] Compared with the prior art, the beneficial technical effects of the present invention are:

[0031] The present invention discloses a ductile iron jacking pipe and a method for using the same. The ductile iron jacking pipe short section is transformed into a relay pipe and a connecting pipe with double sockets at both ends, and a jack is installed at the joint between the relay pipe and the connecting pipe. Meanwhile, a protective sleeve is sleeved on the outer surface of the joint between the relay pipe and the connecting pipe to form a relay room in the jacking operation, thereby realizing waste recycling and reducing costs and increasing efficiency. In addition, during the jacking construction process, a segmented jacking method is adopted, which has lower strength requirements on a back wall and a jacking machine, is convenient for arranging and reinforcing a working well, and has lower requirements on a construction site. Meanwhile, after the construction is completed, it only needs to surpass the jacks in sequence, which is convenient for rapid construction, shortens the construction period, and reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the main view of a ductile iron jacking pipe assembly according to the present invention (non-working state);

[0034] Figure 2 This is a schematic diagram of the front view of a ductile iron jacking pipe assembly (working state) of the present invention;

[0035] Figure 3 It is a schematic diagram of the main view of the assembly of the relay pipe and the jack of the present invention;

[0036] Figure 4 It is a three-dimensional schematic diagram of the assembly of the relay pipe and the jack of the present invention;

[0037] Figure 5 It is a stereoscopic schematic diagram of the assembly of the relay tube and the protective sleeve of the present invention.

[0038] Explanation of the accompanying drawings: 1. connecting pipe; 2. concrete layer; 3. relay pipe; 4. jacking reinforcement rib; 5. first jacking flange; 6. jack; 7. protective sleeve; 8. second jacking flange; 9. guide pipe. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] like Figure 1-5 As shown, a ductile iron jacking pipe includes a connecting pipe 1 and a relay pipe 3. The connecting pipe 1 is plugged into the relay pipe 3, and a protective sleeve 7 is sleeved at the joint between the connecting pipe 1 and the relay pipe 3. The protective sleeve can ensure that when a gap is generated between the connecting pipe and the relay pipe, mud inside the soil layer will not enter the connecting pipe and the relay pipe, thereby achieving effective blocking.

[0041] Specifically, sockets are fixedly installed at the openings at both ends of the connecting pipe 1, and the sockets are truncated cone-shaped. The sockets at both ends of the connecting pipe can effectively connect the plug-in interface of the top pipe and the plug-in interface of the relay pipe, thereby improving the environmental adaptability of the double-socket-interface connecting pipe and ensuring that the relay pipe converted from the ductile iron top pipe short section can be fully utilized.

[0042] Specifically, two groups of first thrust flanges 5 are fixedly installed at equal intervals on the outer circumferential surface of the relay pipe 3 , and thrust reinforcement ribs 4 are fixedly installed between opposite surfaces of the two groups of the first thrust flanges 5 .

[0043] Specifically, the opposite surfaces of the receiving interface and the opposite surfaces of the first jacking flange 5 are covered with a concrete layer 2, and during the construction process, wax melting measures and thixotropic mud technology are used on the outer surface of the concrete layer to reduce the jacking resistance and stabilize the surrounding soil;

[0044] A guide groove is provided on the concrete layer 2 on the outer peripheral surface of the relay pipe 3 .

[0045] Specifically, the inner diameter of the protective sleeve 7 is equal to the outer diameter of the concrete layer 2 on the outer peripheral surface of the relay pipe 3 .

[0046] Specifically, a second push flange 8 is fixedly mounted on the inner wall of one end opening of the protection sleeve 7, and the second push flange 8 corresponds to the first push flange 5;

[0047] A jack 6 is fixedly installed between the first jacking flange 5 and the second jacking flange 8. When the jack is extended and retracted, it can synchronously drive the protective sleeve to move, transform the ductile iron jacking pipe short section into a relay room, and complete the jacking operation of the jacking pipe;

[0048] When jacking pipes inside the soil layer, the connecting pipes and relay pipes are installed with the designed length, and sufficient safety factor of jacking force should be reserved. At the same time, the rebound of the confluence resistance should be considered to prevent ground settlement, and jacks should be installed between the connecting pipes and relay pipes to divide the jacking pipes into several jacking intervals for jacking in sections. There is no need to specially reinforce the structural performance of the back wall of the working well to overcome the jacking resistance, which can better adapt to the construction environment. Furthermore, the segmented jacking method can also reduce the load of the back wall and the jacking machine, and can ensure that the jacking force of the jacking machine does not exceed the maximum jacking force that the ductile iron jacking pipe and the back wall can withstand;

[0049] At the same time, the joints between the connecting pipe and the relay pipe are protected by the protective sleeve to prevent the soil from burying the gap between the connecting pipe and the relay pipe, affecting subsequent construction; it can also prevent external mud from penetrating into the inside of the connecting pipe and the relay pipe;

[0050] It also includes guide tubes 9, which are installed at equal intervals on the inner wall of the protective sleeve 7. The guide tubes 9 match the position of the guide grooves. The guide tubes can further ensure the compression resistance of the protective sleeve, and prevent the soil above the protective sleeve from squeezing and deforming the protective sleeve during the jacking process of the relay pipe.

[0051] After the jacking operation is completed, the jacks are removed from front to back in sequence, so that the connecting pipe, protective sleeve and relay pipe are abutted against each other, the guide pipe and the guide groove are overlapped, and grouting is injected through the grouting holes to make the connecting pipe, protective sleeve and relay pipe form a sealed pipe to prevent leakage at the joints when water flows through the pipe, erosion of the outer soil, and irregular settlement of the upper soil layer.

[0052] A method for using a ductile iron jacking pipe comprises the following steps:

[0053] S1. Hoist the connecting pipe, push the jacking pipe into the soil layer to a predetermined distance, place the connecting pipe on the guide rail through a special hoist, and adjust the axis of the connecting pipe to keep it consistent with the axis of the jacking pipe;

[0054] S2. Hoist the push ring and place the push ring on the guide rail at one end of the connecting pipe away from the mirror wall by using a crane;

[0055] S3, the connecting pipe is pushed up, and the pipe jacking machine fixed on the back wall works, by pushing up the pushing ring, so that the pushing ring pushes the connecting pipe to slide on the guide rail and abut against the plug interface of the jacking pipe in the pipeline;

[0056] S4, lift off the push ring, make the connecting pipe contact with the plug interface of the push pipe, push the connecting pipe into the mirror wall, and then lift the push ring off the guide rail by a crane;

[0057] S5. Install the relay pipe. Use a special lifting device to hang the relay pipe with the protective sleeve and jack installed on the guide rail, and adjust the axis of the relay pipe so that the axis of the relay pipe and the connecting pipe are in the same straight line;

[0058] S6. Hoist the push ring again and use a crane to hoist the push ring to the end of the relay pipe where the protective sleeve is not installed;

[0059] S7, jacking the relay pipe, the jacking machine fixed on the back wall works, and the relay pipe is jacked through the jacking ring, and further, the jacking ring pushes the relay pipe to slide on the guide rail and abut against the receiving interface of the connecting pipe, and the jacking pipe inside the soil layer is jacked;

[0060] S8, installing the jacking pipe for jacking, installing the jacking pipe on the guide rail, placing the jacking ring, and using the jacking machine fixed on the back wall to abut the receiving interface of the jacking pipe with the plug interface of the relay pipe, and pushing the jacking pipe into the soil layer;

[0061] S9, relay jacking, after the connecting pipe and the relay pipe are jacked into the soil layer for a predetermined distance, the pipe jacking machine fixed on the back wall does not shrink and continues to work. At this time, the jack entering the soil layer works, and the jack drives the protective sleeve to jack the connecting pipe. Further, the jacking operation is performed on the jacking pipe in the forward direction of the connecting pipe;

[0062] S10. Repeat steps S1-S9 until the jacking pipe and the machine head are pushed out from the mirror wall at the other end. Before the jacking pipe and the machine head are pushed out, the jacks between the relay pipe and the connecting pipe are removed in advance according to the design requirements. When there are multiple connecting pipes and relay pipes, the jacks far away from the jacking machine are removed first, and then the jacks are removed in sequence.

[0063] Specifically, in step S9, after the jacking operation inside the soil layer is completed, the pipe jacking machine is retracted, and the jacking pipe or connecting pipe, relay pipe is hoisted according to the design requirements, and the jacking operation is continued. When the pipe jacking machine is performing the jacking operation, the jack inside the soil layer is synchronously retracted.

[0064] Specifically, in step S9, the data feedback of the laser directional measurement technology is used to control the telescopic distance of multiple jacks on the relay pipe, so as to correct the direction of the combined jacking force during the jacking process.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0066] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A ductile iron jacking pipe, characterized in that: It comprises a connecting pipe (1) and a relay pipe (3), wherein the connecting pipe (1) is plugged into the relay pipe (3), and a protective sleeve (7) is sleeved at the joint between the connecting pipe (1) and the relay pipe (3).

2. A ductile iron jacking pipe according to claim 1, characterized in that: Sockets are fixedly mounted at the openings at both ends of the connecting pipe (1), and the sockets are truncated cone-shaped.

3. A ductile iron jacking pipe according to claim 2, characterized in that: Two groups of first thrust flanges (5) are fixedly installed at equal intervals on the outer peripheral surface of the relay pipe (3), and thrust reinforcement ribs (4) are fixedly installed between the opposite surfaces of the two groups of the first thrust flanges (5).

4. A ductile iron jacking pipe according to claim 3, characterized in that: A concrete layer (2) is coated between the opposite surfaces of the receiving interface and the opposite surfaces of the first thrust flange (5); A guide groove is provided on the concrete layer (2) on the outer peripheral surface of the relay pipe (3).

5. A ductile iron jacking pipe according to claim 4, characterized in that: The inner diameter of the protective sleeve (7) is equal to the outer diameter of the concrete layer (2) on the outer peripheral surface of the relay pipe (3).

6. A ductile iron jacking pipe according to claim 5, characterized in that: A second thrust flange (8) is fixedly mounted on the inner wall of the opening at one end of the protection sleeve (7), and the second thrust flange (8) corresponds to the first thrust flange (5); A jack (6) is fixedly installed between the first thrust flange (5) and the second thrust flange (8).

7. A ductile iron jacking pipe according to claim 6, characterized in that: It also comprises guide tubes (9), which are installed at equal intervals on the inner wall of the protective sleeve (7), and the positions of the guide tubes (9) and the guide grooves match each other.

8. A method for using a ductile iron jacking pipe, which is completed according to the ductile iron jacking pipe according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1. Hoist the connecting pipe, push the jacking pipe into the soil layer to a predetermined distance, place the connecting pipe on the guide rail through a special hoist, and adjust the axis of the connecting pipe to keep it consistent with the axis of the jacking pipe; S2. Hoist the push ring and place the push ring on the guide rail at one end of the connecting pipe away from the mirror wall by using a crane; S3, the connecting pipe is pushed up, and the pipe jacking machine fixed on the back wall works, by pushing up the pushing ring, so that the pushing ring pushes the connecting pipe to slide on the guide rail and abut against the plug interface of the jacking pipe in the pipeline; S4, lift off the push ring, make the connecting pipe contact with the plug interface of the push pipe, push the connecting pipe into the mirror wall, and then lift the push ring off the guide rail by a crane; S5. Install the relay pipe. Use a special lifting device to hang the relay pipe with the protective sleeve and jack installed on the guide rail, and adjust the axis of the relay pipe so that the axis of the relay pipe and the connecting pipe are in the same straight line; S6. Hoist the push ring again and use a crane to hoist the push ring to the end of the relay pipe where the protective sleeve is not installed; S7, jacking the relay pipe, the jacking machine fixed on the back wall works, and the relay pipe is jacked through the jacking ring, and further, the jacking ring pushes the relay pipe to slide on the guide rail and abut against the receiving interface of the connecting pipe, and the jacking pipe inside the soil layer is jacked; S8, installing the jacking pipe for jacking, installing the jacking pipe on the guide rail, placing the jacking ring, and using the jacking machine fixed on the back wall to abut the receiving interface of the jacking pipe with the plug interface of the relay pipe, and pushing the jacking pipe into the soil layer; S9, relay jacking, after the connecting pipe and the relay pipe are jacked into the soil layer for a predetermined distance, the pipe jacking machine fixed on the back wall does not shrink and continues to work. At this time, the jack entering the soil layer works, and the jack drives the protective sleeve to jack the connecting pipe. Further, the jacking operation is performed on the jacking pipe in the forward direction of the connecting pipe; S10, repeat steps S1-S9 until the jacking pipe and the machine head are pushed out from the mirror wall at the other end.

9. The method for using a ductile iron jacking pipe according to claim 8, characterized in that: In step S9, after the jacking operation inside the soil layer is completed, the pipe jacking machine is retracted, and the jacking pipe or connecting pipe, relay pipe is hoisted according to the design requirements, and the jacking operation is continued. When the pipe jacking machine is performing the jacking operation, the jack inside the soil layer is synchronously retracted.

10. The method for using a ductile iron jacking pipe according to claim 9, characterized in that: In step S9, the data feedback from the measuring device is used to control the telescopic distances of the multiple jacks on the relay pipe, thereby achieving deviation correction during the jacking process.

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