A construction method of self-compacting concrete filled with steel pipe inside jacking pipe

Abstract

The invention discloses a construction method of self-compacting concrete filled with steel pipe in a jacking pipe, firstly, a DN1800 reinforced concrete pipe is jacked in and passed through the road, then a water pipe is welded and inserted in the concrete casing, and the gap between the DN1800 reinforced concrete casing and the DN1200 steel pipe is filled with C15 self-compacting concrete. The reinforced concrete pipe is jacked in and passed through the road, seamless steel pipes are staggered on the top of the concrete casing, exhaust pipe and grouting pipe are combined, water pipes are erected, welded and pulled in, and self-compacting concrete is poured in three times, which saves labor in the construction process, speeds up the construction speed, and thus shortens the project period; the noise in the construction process is low, which is conducive to reducing the impact on the surrounding environment; at the same time, the problem of non-compact concrete pouring encountered in the construction process is solved, and the uniformity and density of the concrete can be ensured.

Description

Technical Field

[0001] The invention relates to the field of engineering construction, and in particular to a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete. Background Art

[0002] The construction of steel pipes for water supply under roads is a complex project that requires ensuring the stability of the steel pipes and their good integration with surrounding structures.

[0003] However, the existing construction process of steel water pipes under roads faces problems such as slow construction speed, long project period, and great impact on the surrounding environment.

[0004] Application Contents

[0005] The purpose of the present application is to provide a construction method of a jacking pipe with a steel pipe filled with self-compacting concrete to solve the technical problems described in the background technology.

[0006] The technical solution adopted in this application is as follows: A construction method for a jacking pipe with a steel pipe filled with self-compacting concrete, comprising the following steps:

[0007] A construction method for a jacking pipe with a steel pipe filled with self-compacting concrete, characterized in that it comprises the following steps:

[0008] S100: A reinforced concrete pipe is used to pass under the road to form a jacking pipe; two seamless steel pipes are arranged alternately on the top of the reinforced concrete pipe, with one end of the steel pipe extending 1m out of the casing and the other end buried in the casing. The seamless steel pipe and the concrete pump pipe are connected with a special joint clip.

[0009] S110: A DN50 grouting steel pipe is laid between two seamless steel pipes, and exhaust holes with a diameter of 20-30mm are drilled every 0.5m. Bolts are arranged at intervals of 2-3m along the axis of the pipeline at the top of the casing, and the seamless steel pipe and the grouting steel pipe are fixed to the inner wall of the concrete pipe with pipe clamps.

[0010] S200: Weld and pass water delivery steel pipes in concrete casing to form water delivery pipelines. The water delivery steel pipes are connected by single-sided bevel welding. Pipe supports with rollers are installed every 2m within 120° of the bottom of the water delivery steel pipes entering the top pipe to ensure the horizontality and center elevation of the pipeline. After the water delivery steel pipe joints in the starting well have passed the flaw detection and external anti-corrosion inspection, start the winch in the receiving well to pull the welded pipe into the receiving well by the distance of one pipe, and repeat in sequence.

[0011] S300: After all the water pipelines in the jacking pipe are welded and installed, brick walls are built with cement mortar at both ends of the concrete pipe to seal them; the gap between the jacking pipe composed of reinforced concrete pipe and the water pipeline is filled with C15 self-compacting concrete, and a concrete delivery pump is installed at each end of the jacking pipe. The feeding pipe is laid along the wall of the working well (including: starting well and receiving well) to the bottom of the well, and the delivery pump is used to deliver C15 self-compacting concrete into the reserved pipe in the concrete pipe.

[0012] Further, S310: concrete pouring in three times:

[0013] S311: For the first pouring, leave a φ50mm exhaust hole and two φ100mm pouring holes on the upper part of the brick wall at both ends of the casing. The delivery pump directly fills the self-compacting concrete through the pouring holes. Stop when the concrete height in the pipe reaches about 400mm. The concrete in the casing fixes the bottom of the steel pipe to prevent the steel pipe from floating.

[0014] S312: Second pouring: Continue filling to the top of the steel pipe within 3 hours (during the initial setting period of concrete).

[0015] S313: The third pouring is to connect the reserved pouring steel pipe on the top of the casing with the delivery pump pipe, and fill the self-compacting concrete through the pouring steel pipe until the concrete slurry flows out of the exhaust hole, reaching the saturated state in the casing.

[0016] Furthermore, the reinforced concrete pipe is a DN1800 reinforced concrete pipe; the seamless steel pipe is a DN100 seamless steel pipe with a wall thickness of 4mm; holes with a diameter of 40 to 60mm are opened along the seamless steel pipe every 3-4m to allow the self-compacting concrete to be evenly filled in the concrete pipe.

[0017] Furthermore, the grouting steel pipe is a DN50 grouting steel pipe and is also an exhaust pipe.

[0018] Furthermore, the water delivery steel pipe is a DN1200 plastic-coated composite steel pipe.

[0019] Further, step S200 also includes: the welding position of the water supply steel pipe in the top pipe is in the starting well, two temporary pipe supports are set in the starting well, and after the truck crane hoists the pipeline into the starting well in sections, the newly hoisted pipeline is matched and welded with the installed pipeline in the previous section using the pipe supports.

[0020] Furthermore, the pipeline support is welded into a door shape using channel steel, and the pipeline is hoisted and adjusted using a hand winch and wire rope. Rollers are set at the bottom of the support to facilitate the movement of the support.

[0021] Further, S320: secondary grouting is performed: after the self-compacting concrete is poured, pure cement slurry is injected through the DN50 exhaust pipe, the cement slurry mix ratio is 1:1, and the cement slurry is pressed into the top gap using a grouting pump.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are: through the jacking of reinforced concrete pipes under the road - staggered arrangement of seamless steel pipes on the top of the concrete casing - combined with exhaust pipes and grouting pipes - erection, welding, and pulling into the water pipeline - pouring self-compacting concrete in three times, saving labor and power in the construction process, speeding up the construction speed, thereby shortening the project period; the noise during the construction process is low, which is conducive to reducing the impact on the surrounding environment; at the same time, the problem of loose concrete pouring encountered during the construction process is solved, and the uniformity and density of the concrete can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application will be more fully understood by referring to the following detailed description of specific embodiments in conjunction with the accompanying drawings, in which the same reference numerals refer to the same elements, wherein:

[0024] Figure 1 The present invention is a schematic diagram of an embodiment of a construction method for a jacking pipe with a steel pipe filled with self-compacting concrete.

[0025] Figure 2 The present invention is a schematic diagram of the arrangement of concrete conveying steel pipes according to an embodiment of a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete.

[0026] Figure 3 The present invention is a schematic cross-sectional diagram of a concrete conveying steel pipe according to an embodiment of a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete.

[0027] Figure 4 The present invention is a schematic diagram of the steel pipe installation arrangement in one embodiment of a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete.

[0028] Figure 5 The present invention is a schematic cross-sectional diagram of steel pipe installation in one embodiment of a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete.

[0029] Figure 6 The present invention is a schematic diagram of brick wall sealing in accordance with an embodiment of a construction method of a top pipe inner sleeve steel pipe filled with self-compacting concrete.

[0030] Figure 7 The present invention is a schematic diagram of concrete pouring in stages in one embodiment of a construction method for a top pipe inner sleeve steel pipe filled with self-compacting concrete. DETAILED DESCRIPTION

[0031] The following description should be read with reference to the accompanying drawings, in which similar elements in different drawings are numbered in the same manner. The accompanying drawings are not necessarily drawn to scale, and they depict examples that are not intended to limit the scope of the present disclosure. Although examples of various elements are shown, those skilled in the art will recognize that many of the examples provided have suitable alternatives that can be utilized.

[0032] It is assumed herein that all numbers are modified by the term "about" unless the content clearly dictates otherwise. The recitation of numerical ranges by endpoints includes all numbers subsumed within that range (eg, 1 to 5 includes 1, 1.5, 2, 2.75, 3, 3.80, 4, and 5).

[0033] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification and the appended claims, the term "or" is generally employed in its sense including "and / or" unless the content clearly dictates otherwise.

[0034] It should be noted that references to "one embodiment", "some embodiments", "other embodiments", etc. in the specification indicate that the described embodiments may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, these phrases do not necessarily refer to the same embodiment. In addition, when a particular feature, structure, or characteristic is described in conjunction with one embodiment, it is contemplated that the feature, structure, or characteristic is described in conjunction with one embodiment, and it is contemplated that the feature, structure, or characteristic may be applied to other embodiments regardless of whether explicitly described, unless otherwise clearly stated.

[0035] As the instruction manual Figure 1-7 As shown:

[0036] A construction method for a jacking pipe with a steel pipe filled with self-compacting concrete comprises the following steps:

[0037] S100: A reinforced concrete pipe is used to pass under the road to form a jacking pipe; two seamless steel pipes are arranged alternately on the top of the reinforced concrete pipe, with one end of the steel pipe extending 1m out of the casing and the other end buried in the casing. The seamless steel pipe and the concrete pump pipe are connected with a special joint clip.

[0038] Specifically, the reinforced concrete pipe is a DN1800 reinforced concrete pipe; the seamless steel pipe is a DN100 seamless steel pipe with a wall thickness of 4 mm; holes with a diameter of 40 to 60 mm are opened along the seamless steel pipe every 3 to 4 m to allow the self-compacting concrete to be evenly filled in the concrete pipe.

[0039] S110: A DN50 grouting steel pipe is laid between two seamless steel pipes, and exhaust holes with a diameter of 20-30mm are drilled every 0.5m. Bolts are arranged at intervals of 2-3m along the axis of the pipeline at the top of the casing, and the seamless steel pipe and the grouting steel pipe are fixed to the inner wall of the concrete pipe with pipe clamps.

[0040] Specifically, the grouting steel pipe is a DN50 grouting steel pipe, which is also an exhaust pipe.

[0041] S200: Weld and pass water delivery steel pipes in concrete casing to form water delivery pipelines. The water delivery steel pipes are connected by single-sided bevel welding. Pipe supports with rollers are installed every 2m within 120° of the bottom of the water delivery steel pipes entering the top pipe to ensure the horizontality and center elevation of the pipeline. After the water delivery steel pipe joints in the starting well have passed the flaw detection and external anti-corrosion inspection, start the winch in the receiving well to pull the welded pipe into the receiving well by the distance of one pipe, and repeat in sequence.

[0042] Specifically, the water supply steel pipe is a DN1200 plastic-coated composite steel pipe.

[0043] Specifically, step S200 also includes: the welding position of the water delivery steel pipe in the top pipe is in the starting well, two temporary pipe supports are set in the starting well, and after the truck crane hoists the pipeline into the starting well in sections, the newly hoisted pipeline is matched and welded with the installed pipeline in the previous section using the pipe supports.

[0044] Specifically, the pipe support is welded into a door shape using channel steel, and the pipe is hoisted and adjusted using a hand winch and wire rope. Rollers are set at the bottom of the support to facilitate the movement of the support.

[0045] S300: After all the water pipelines in the jacking pipe are welded and installed, brick walls are built with cement mortar at both ends of the concrete pipe to seal them; the gap between the jacking pipe composed of reinforced concrete pipe and the water pipeline is filled with C15 self-compacting concrete, and a concrete delivery pump is installed at each end of the jacking pipe. The feeding pipe is laid along the wall of the working well (including: starting well and receiving well) to the bottom of the well, and the delivery pump is used to deliver C15 self-compacting concrete into the reserved pipe in the concrete pipe.

[0046] S310: Concrete pouring in three times:

[0047] S311: For the first pouring, leave a φ50mm exhaust hole and two φ100mm pouring holes on the upper part of the brick wall at both ends of the casing. The delivery pump directly fills the self-compacting concrete through the pouring holes. Stop when the concrete height in the pipe reaches about 400mm. The concrete in the casing fixes the bottom of the steel pipe to prevent the steel pipe from floating.

[0048] S312: Second pouring: Continue filling to the top of the steel pipe within 3 hours (during the initial setting period of concrete).

[0049] S313: The third pouring is to connect the reserved pouring steel pipe on the top of the casing with the delivery pump pipe, and fill the self-compacting concrete through the pouring steel pipe until the concrete slurry flows out of the exhaust hole, reaching the saturated state in the casing.

[0050] Specifically, S320: Perform secondary grouting: After the self-compacting concrete is poured, pure cement slurry is injected through the DN50 exhaust pipe, and the cement slurry mix ratio is 1:1. The cement slurry is pressed into the top gap by a grouting pump. After the self-compacting concrete is poured, due to the loose pouring or cement solidification shrinkage, there may be a few gaps in the top wall of the DN1800 reinforced concrete casing, so it is necessary to perform secondary grouting after the self-compacting concrete is initially set.

[0051] The construction method of self-compacting concrete filled with a steel pipe inside a jacking pipe involved in the present embodiment is to push the reinforced concrete pipe under the road - staggered seamless steel pipes are arranged on the top of the concrete casing - exhaust pipes and grouting pipes are combined - the water pipeline is erected, welded and pulled in - and the self-compacting concrete is poured in three times, which saves labor and power in the construction process of self-compacting concrete filling, speeds up the construction speed, and thus shortens the project period; the noise during the construction process is low, which is conducive to reducing the impact on the surrounding environment; at the same time, the problem of loose concrete pouring encountered during the construction process is solved, and the uniformity and density of the concrete can be ensured.

[0052] The detailed description and the accompanying drawings or figures support and describe the present disclosure, but the scope of the present disclosure is limited only by the claims. Although some of the best modes and other embodiments for implementing the claimed disclosure have been described in detail, there are various alternative designs and embodiments for practicing the present disclosure defined in the appended claims. In addition, the embodiments shown in the drawings or the features of the various embodiments mentioned in this description do not have to be understood as embodiments that are independent of each other. On the contrary, it is possible that each of the features described in one example of an embodiment can be combined with one or more other desired features from other embodiments, resulting in other embodiments that are not described in words or by reference to the drawings. Therefore, such other embodiments fall within the framework of the scope of the appended claims.

Claims

1. A construction method for filling self-compacting concrete with a steel pipe inside a jacking pipe, characterized in that: The following steps are involved: S100: Use reinforced concrete casing to push down and pass through the road to form a jacking pipe; two seamless steel pipes are staggered on the top of the reinforced concrete casing, one end of the seamless steel pipe extends 1m out of the reinforced concrete casing, and the other end is buried in the reinforced concrete casing. The seamless steel pipe and the concrete pump pipe are connected with a special joint buckle; S110: A DN50 grouting steel pipe is laid between two seamless steel pipes, and exhaust holes with a diameter of 20-30 mm are drilled every 0.5 m. Bolts are arranged at intervals of 2-3 m along the axis of the pipe at the top of the reinforced concrete casing, and the seamless steel pipe and the grouting steel pipe are fixed to the inner wall of the reinforced concrete casing with pipe clamps; S200: Weld and install water delivery steel pipes in reinforced concrete casing to form water delivery pipelines. The water delivery steel pipes are connected by single-sided groove welding. A pipe support with rollers is installed every 2m within 120° of the bottom of the water delivery steel pipe entering the top pipe to ensure the horizontal and center elevation of the pipeline. After the joints of the water delivery steel pipes in the starting well are qualified by flaw detection and the external anti-corrosion is completed, start the winch in the receiving well to pull the welded pipe into the receiving well by the distance of one pipe, and repeat in sequence; S300: After all the water pipelines in the jacking pipe are welded and installed, brick walls are built with cement mortar at both ends of the reinforced concrete casing to seal them; the gap between the jacking pipe composed of the reinforced concrete casing and the water pipeline is filled with C15 self-compacting concrete, and a concrete delivery pump is installed at each end of the jacking pipe. The feed pipe is laid along the wall of the working well to the bottom of the well, and the delivery pump is used to deliver C15 self-compacting concrete into the reserved pipe in the reinforced concrete casing.

2. The construction method of self-compacting concrete filled with steel pipe in jacking pipe as claimed in claim 1, characterized in that: S310: Concrete pouring in three times: S311: For the first pouring, leave a φ50mm exhaust hole and two φ100mm pouring holes on the upper part of the brick wall at both ends of the reinforced concrete casing. The delivery pump directly fills the self-compacting concrete through the pouring holes. When the height of the concrete in the pipe reaches about 400mm, stop pouring, so that the concrete in the reinforced concrete casing can fix the bottom of the water delivery steel pipe to prevent the water delivery steel pipe from floating up; S312: The second pouring, continue to fill to the top of the water delivery steel pipe within 3 hours; S313: The third pouring is to connect the seamless steel pipe reserved on the top of the reinforced concrete casing to the delivery pump pipe, and fill the self-compacting concrete through the seamless steel pipe until the concrete slurry flows out of the exhaust hole, reaching the saturated state in the reinforced concrete casing.

3. The construction method of self-compacting concrete filled with steel pipe in jacking pipe according to any one of claims 1 or 2, characterized in that: The reinforced concrete casing is a DN1800 reinforced concrete pipe; the seamless steel pipe is a DN100 seamless steel pipe with a wall thickness of 4mm; holes with a diameter of 40 to 60mm are opened along the seamless steel pipe every 3-4m to allow the self-compacting concrete to be evenly filled in the reinforced concrete casing.

4. The construction method of self-compacting concrete filled with steel pipe in jacking pipe according to any one of claims 1 or 2, characterized in that: The grouting steel pipe is a DN50 grouting steel pipe and is also an exhaust pipe.

5. The construction method of self-compacting concrete filled with steel pipe in jacking pipe according to any one of claims 1 or 2, characterized in that: The water supply steel pipe is DN1200 plastic-coated composite steel pipe.

6. The construction method of self-compacting concrete filled with steel pipe in jacking pipe according to any one of claims 1 or 2, characterized in that: Step S200 also includes: the welding position of the water delivery steel pipe in the top pipe is in the starting well, two temporary pipe supports are set in the starting well, and after the truck crane hoists the pipeline into the starting well in sections, the newly hoisted pipeline is matched and welded with the installed pipeline of the previous section by using the pipe supports.

7. The construction method of self-compacting concrete filled with steel pipe in jacking pipe as claimed in claim 6, characterized in that: The pipe support is welded into a door shape using channel steel. The pipe is hoisted and adjusted using a hand winch and wire rope. Rollers are set at the bottom of the support to facilitate movement of the support.

8. The construction method of self-compacting concrete filled with steel pipe in jacking pipe as claimed in claim 4, characterized in that: S320: Perform secondary grouting: After the self-compacting concrete pouring is completed, pure cement slurry is injected through the DN50 exhaust pipe. The cement slurry mix ratio is 1:1, and the cement slurry is pressed into the top gap using a grouting pump.

9. A construction method for filling self-compacting concrete with a steel pipe inside a jacking pipe, characterized in that: The following steps are involved: S100: Use reinforced concrete casing to push down and pass through the road to form a jacking pipe; two seamless steel pipes are staggered on the top of the reinforced concrete casing, one end of the seamless steel pipe extends 1m out of the reinforced concrete casing, and the other end is buried in the casing. The seamless steel pipe and the concrete pump pipe are connected with a special joint buckle; The reinforced concrete casing is a DN1800 reinforced concrete pipe; the seamless steel pipe is a DN100 seamless steel pipe with a wall thickness of 4mm; holes are opened along the seamless steel pipe every 3-4m, with a diameter of 40-60mm, so that the self-compacting concrete is evenly filled in the reinforced concrete casing; S110: A DN50 grouting steel pipe is laid between two seamless steel pipes, and exhaust holes with a diameter of 20-30 mm are drilled every 0.5 m. Bolts are arranged at intervals of 2-3 m along the axis of the pipe at the top of the reinforced concrete casing, and the seamless steel pipe and the grouting steel pipe are fixed to the inner wall of the reinforced concrete casing with pipe clamps; The grouting steel pipe is a DN50 grouting steel pipe, which is also an exhaust pipe; S200: Weld and install water delivery steel pipes in reinforced concrete casing to form water delivery pipelines. The water delivery steel pipes are connected by single-sided groove welding. A pipe support with rollers is installed every 2m within 120° of the bottom of the water delivery steel pipe entering the top pipe to ensure the horizontal and center elevation of the pipeline. After the joints of the water delivery steel pipes in the starting well are qualified by flaw detection and the external anti-corrosion is completed, start the winch in the receiving well to pull the welded pipe into the receiving well by the distance of one pipe, and repeat in sequence; The water delivery steel pipe is a DN1200 plastic-coated composite steel pipe; step S200 also includes: the welding position of the water delivery steel pipe in the top pipe is in the starting well, two temporary pipe supports are set in the starting well, after the automobile crane hoists the pipe into the starting well in sections, the newly hoisted pipe is matched and welded with the installed pipe in the previous section by using the pipe support; the pipe support is welded into a door shape by channel steel, and the pipe is hoisted and adjusted by hand winch and wire rope, and rollers are set at the bottom of the support to facilitate the movement of the support; S300: After all the water pipelines in the jacking pipe are welded and installed, brick walls are built with cement mortar at both ends of the reinforced concrete casing to seal them; the gap between the jacking pipe composed of the reinforced concrete casing and the water pipeline is filled with C15 self-compacting concrete, and a concrete delivery pump is installed at each end of the jacking pipe. The delivery pipe is laid along the wall of the working well to the bottom of the well, and the delivery pump is used to deliver C15 self-compacting concrete into the reserved pipe in the reinforced concrete casing; S310: Concrete is poured in three times: S311: For the first pouring, a φ50mm exhaust hole and two φ100mm injection holes are left on the upper part of the brick wall at both ends of the reinforced concrete casing. The delivery pump directly fills the self-compacting concrete through the injection holes. When the height of the concrete in the pipe reaches about 400mm, it stops, so that the concrete in the reinforced concrete casing fixes the bottom of the water delivery steel pipe to prevent the water delivery steel pipe from floating up; S312: For the second pouring, the concrete is continued to be filled to the top of the water delivery steel pipe within an interval of less than 3 hours; S313: For the third pouring, the seamless steel pipe reserved at the top of the reinforced concrete casing is connected to the delivery pump pipe, and the self-compacting concrete is filled through the seamless steel pipe until the concrete slurry flows out of the exhaust hole, and the reinforced concrete casing is filled to a saturated state; S320: Perform secondary grouting: After the self-compacting concrete pouring is completed, pure cement slurry is injected through the DN50 exhaust pipe. The cement slurry mix ratio is 1:1, and the cement slurry is pressed into the top gap using a grouting pump.

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