CN110984153B - Construction method for pouring concrete behind hole-penetrating steel pipe - Google Patents
Construction method for pouring concrete behind hole-penetrating steel pipe Download PDFInfo
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Abstract
The invention discloses a construction method for pouring concrete behind a hole-penetrating steel pipe. And an exhaust pipe and a grouting pipe are arranged at the top of the annular layer of the hole-penetrating steel pipe and the concrete pipe, and two ends of the annular layer are plugged by wall building. And a plurality of ash pouring openings are formed in the top end of the hole penetrating steel pipe. The pouring pipe is communicated with the mortar pouring port, and first-stage concrete is poured; and when the height of the concrete is close to the middle height of the hole-penetrating steel pipe, the pouring pipe is moved to the next mortar pouring opening, and the pouring step is repeated. And installing the pouring pipe again, and beginning to pour the second-stage concrete. And stopping pouring when the next mortar pouring port is uniform and stable and leaks mortar, moving the pouring pipe to the next mortar pouring port, and permanently plugging the mortar pouring port after pouring. And grouting into the grouting pipe, and filling the top cavity. And carrying out antiseptic treatment on the ash pouring opening. The invention has the advantages of ensuring that the poured self-sealing concrete is fuller and reducing the grout filling amount.
Description
Technical Field
The invention relates to the technical field of a construction process of a hole penetrating pipe, in particular to a construction method for pouring concrete behind a hole penetrating steel pipe.
Background
The water-conveying tunnel is an important component in water diversion and water regulation engineering, and currently, a multilayer lining is often adopted, generally comprising: the concrete pipe of outer lining, the steel pipe of perforating of inside lining and pack in the annular space intralamellar self-compaction concrete etc. of outer lining and inside lining.
According to the Chinese patent with the patent application number of CN201811628435.5, the scheme of backfilling concrete in an annular space layer at present comprises a tunnel body and a steel pipe arranged in the tunnel body, wherein an interlayer is reserved between the tunnel body and the steel pipe, two ends of the interlayer are arranged in a sealed manner, an exhaust port is reserved, pouring pipes are arranged in the steel pipe at intervals, the pouring pipes are communicated with the interlayer, and the input ends of the pouring pipes are provided with flashboards; grouting pipes are uniformly distributed among the pouring pipes.
When self-compacting concrete is backfilled, the self-compacting concrete is filled in the interlayer through the pouring pipe, when concrete leaks out from the grouting pipe on one side of the pouring pipe, pouring is stopped, the pouring pipe is closed through the flashboard, and then the pouring pipe is moved to the next pouring pipe for pouring; and after the concrete is backfilled, grouting and filling are carried out through the grouting pipe.
The adoption of the scheme has the following defects: when one cement pouring port is poured and the next cement pouring port is poured, the concrete at the cement pouring port which is poured flows to the region which is not poured, so that the height of the concrete at the cement pouring port which is poured is reduced; after the pouring is finished, a large empty layer exists at the top of the backfilled concrete, a large amount of slurry supplement treatment is needed, the cost is increased, and the strength of slurry backfilled at the top of the annular layer is low after the slurry is solidified.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the construction method for pouring the concrete behind the hole-penetrating steel pipe, which has the advantages that the poured self-sealing concrete is fuller, the grout filling amount is reduced, and the strength of the annular space layer backfilled concrete is ensured.
The above object of the present invention is achieved by the following technical solutions:
a construction method for pouring concrete behind a hole-penetrating steel pipe comprises the following construction steps:
step 1, preparation: an exhaust pipe and a grouting pipe are arranged at the top of the annular layer of the hole-penetrating steel pipe and the concrete pipe, the exhaust pipe and the grouting pipe are arranged in a through manner, and two ends of the exhaust pipe penetrate through the end head of the hole-penetrating steel pipe; and (5) building walls on annular space layers at two ends of the hole penetrating steel pipe for plugging. And a plurality of ash pouring openings are formed at the top end of the hole penetrating steel pipe at intervals. Two sets of ground pump systems are installed at two ends of the hole penetrating steel pipe, and two pouring pipes are installed to the middle position from two ports of the hole penetrating steel pipe respectively.
And step 4, grouting construction: and (4) grouting from two ends into the grouting pipe simultaneously, and completely filling the top cavity with the grout.
And step 5, antiseptic treatment: and carrying out antiseptic treatment on the ash pouring opening after the sealing cover is closed.
Through the technical scheme, compared with one-time pouring in the background technical scheme, the concrete is poured in two stages, after the first-stage pouring is finished, the backfilled self-sealing concrete has a certain height, when the second-stage pouring is carried out, the concrete is backfilled at the ash filling opening after the second-stage pouring is finished, when the concrete flows to an area which is not subjected to the second-stage refilling, the height difference between the ash filling opening and the ash filling opening is reduced, the height reduction range of the backfilled concrete at the ash filling opening is reduced, the empty layer at the top of the backfilled concrete is reduced, the grout filling amount is reduced, and the strength of the backfilled concrete in the annular space is ensured. Concrete pouring is carried out in two stages, so that the height difference between the ash pouring opening and the ash pouring position is reduced, operators can better master the ash pouring size, and the control of the operators on the ash pouring time and the ash pouring amount of each ash pouring opening is enhanced.
The invention is further configured to: before concrete is poured, installing an anti-floating device at the vault of the concrete pipe, wherein the distance from the bottom end of the anti-floating device to the top end of the hole penetrating steel pipe is 10 mm; and when the first-stage concrete is poured, monitoring the vertical displacement below the next cement pouring port of the cement pouring port which is being poured, and when the through-hole steel pipe at the position floats upwards by 10mm, moving the pouring pipe to the next cement pouring port.
Through the technical scheme, the arrangement of the anti-floating assembly has a limiting effect on the hole penetrating steel pipe, and the floating of the hole penetrating steel pipe is limited within the range allowed by construction errors; and the condition that the anti-floating component falls off in a touching manner in the process that the hole-penetrating steel pipe penetrates into the concrete pipe is avoided. The operator can measure the slight floating amount of the hole penetrating steel pipe to judge the degree of backfilling concrete.
The invention is further configured to: a plurality of observation holes symmetrically arranged by using the central axis of the hole penetrating steel pipe are arranged in the middle of the hole penetrating steel pipe at intervals, and in the primary concrete pouring process, concrete in the annular space layer is observed from two observation holes at the same position, so that the concrete heights at two sides of the hole penetrating steel pipe are approximately the same; the flashlight and the mobile phone are inserted into the observation hole, and videos are recorded by the mobile phone to observe the concrete pouring condition and the pouring height; and before the second-stage concrete is poured, permanently sealing the observation hole.
Through the technical scheme, the observation and the judgment of the backfill degree of the first-stage concrete in the annular space layer by the operating personnel are further enhanced, so that the operating personnel can timely adjust the operation according to the backfill degree of the first-stage concrete.
The invention is further configured to: and in the retreating type pouring process, the two ends of the hole penetrating pipe are plugged by building a wall, and an end observation port is reserved at the top of the wall.
Observation during first-stage concrete pouring: the method comprises the following steps of (1) utilizing the induction and matching of the internal temperature of a hand-touch hole-penetrating steel pipe, observing through a middle observation hole, recording a video by using a flashlight and a mobile phone, and determining the time for replacing the ash pouring port by multiple means by combining the vertical displacement monitoring of a measurer and the square amount calculation; and after the concrete is poured in the first period, blocking the middle observation hole.
Pouring second-stage concrete: before the second concrete pouring, the interval time is a period of time, and after the initial setting of the concrete, the second-stage concrete pouring can be started; meanwhile, the pouring pipe used for pouring concrete for the first time is cleaned up, or a new pouring pipe is replaced for pouring.
A ground pump pouring pipe is installed in the hole penetrating steel pipe again, and the two sets of ground pump systems are installed to the middle position from the two ports respectively and are communicated with the two adjacent grouting openings in the middle; sequentially pouring each ash pouring opening until the next ash pouring opening is uniformly and stably grouted; then plugging the cement pouring port, and transferring to the next cement pouring port until the pipe orifice of the hole-penetrating steel pipe.
Observation during pouring of second-stage concrete: the method comprises the following steps of (1) utilizing the temperature induction matching of the inside of a through steel pipe of a hand-touch hole, recording a video from a top ash pouring port by the aid of a hand-electric matched mobile phone, and observing the concrete pouring condition by multiple means in combination with square amount calculation; and finally, observing the concrete condition by using the end observation port, and plugging the end observation port after the pouring is finished.
Through the technical scheme, the observation of concrete in the annular space layer during the first-stage backfilling of concrete and the second-stage backfilling of concrete is further enhanced, and the control of operators on the time of backfilling the concrete at the mortar filling opening is enhanced by combining various means.
The invention is further configured to: and during grouting, high-pressure grouting is adopted, the grouting pressure change is noticed, and grouting is stopped when the slurry is reserved from the exhaust pipe at a speed equal to the grouting speed.
According to the technical scheme, the annular layer is long, high-pressure grouting is adopted, the annular layer is subjected to slurry supplementing treatment, and the fullness of slurry supplementing is guaranteed; compared with the grouting measure in the background technology, the method is more efficient.
The invention is further configured to: welding a sleeve in advance at the cement pouring port, wherein the sleeve is provided with an internal thread, when concrete is poured, an input pipe provided with an external thread is screwed into the sleeve, and the bottom of the input pipe is connected with a hoop for a ground pump pouring pipe; the sealing cover for sealing the ash pouring port is also provided with threads, and when the ash pouring port is sealed, the sealing cover is screwed into the ash pouring port.
Through the technical scheme, the detachable connection of the ash pouring opening and the pouring pipe is realized, and the pouring of the annular layer by operators is facilitated.
The invention is further configured to: the anti-floating device comprises a top connecting plate, a bottom supporting plate at the bottom and three vertical supporting steel bars welded between the bottom supporting plate and the connecting plate; the connecting plate is fixed at the top end of the annular layer by adopting an expansion bolt; the distance between the bottom supporting plate and the top end of the hole penetrating steel pipe is 10 mm; two horizontal outward supporting plates which are symmetrical in center are welded on the two supporting steel bars respectively. The grouting pipes and the exhaust pipes are respectively arranged on the two outer supporting plates, the grouting pipes and the upper surfaces of the outer supporting plates are welded, and the exhaust pipes and the upper surfaces of the other outer supporting plates are welded.
Through the technical scheme, the connecting plate facilitates the connection of the anti-floating component and the top of the inner wall of the concrete pipe, increases the contact area of the anti-floating component and the inner wall of the concrete pipe, and enhances the compressive strength of the contact part of the anti-floating component and the concrete pipe; when the hole-penetrating steel pipe floats upwards, the abutting area of the anti-floating assembly on the hole-penetrating steel pipe is enlarged by the bottom supporting plate; the three vertical supporting steel bars are arranged in a triangle, so that the bending resistance of the anti-floating component is enhanced; the outer supporting plate that the level set up has realized the fixed at the top of concrete pipe inner wall of blast pipe and slip casting pipe, and has made things convenient for the installation of blast pipe and slip casting pipe fixed.
The invention is further configured to: the following work is required to be completed during the pouring of the self-compacting concrete of each mortar pouring opening: preparing for pouring the next mortar pouring opening; and cleaning the leaked concrete after the former pouring pipe is changed.
Through above-mentioned technical scheme, realized the continuity of construction, improved the efficiency of construction, and can avoid leading to pouring the concrete of grey mouthful department that finishes to flow too much to not pouring the region because of connecting the time of irritating the grey pipe too long for the empty layer grow at concrete top.
In conclusion, the invention has the following beneficial effects:
1. according to the scheme, the concrete is poured in two stages, after the first stage pouring is finished, the backfilled self-sealing concrete has a certain height, when the second stage pouring is carried out, the backfilled concrete at the position of the ash pouring opening which is poured in the second stage flows to the area which is not backfilled in the second stage, the height difference between the ash pouring opening and the position which is not grouted is smaller than that of the scheme in the background technology, the height reduction range of the backfilled concrete at the ash pouring opening is reduced, the empty layer at the top of the backfilled concrete is reduced, the grout supplement amount is reduced, and the strength of the backfilled concrete in the annular layer is guaranteed. Concrete pouring is carried out in two stages, so that the height difference between the ash pouring openings and the ash pouring non-positions is reduced, operators can better master the size of the ash pouring, and the operators can conveniently control the ash pouring time and the ash pouring amount of each ash pouring opening;
2. the arrangement of the end observation hole and the observation hole in the middle of the hole-penetrating steel pipe and the combination of various means further enhance the observation and judgment of the operation personnel on the backfill degree of the first-stage concrete in the annular space layer, enhance the control of the operation personnel on the backfill time of the concrete at the cement pouring hole, and enable the operation personnel to timely adjust the operation according to the backfill degree of the first-stage concrete;
3. the sleeve arranged at the ash pouring opening realizes the detachable connection of the ash pouring opening and the pouring pipe, is convenient for operators to pour the annular layer, and provides powerful support for backfilling concrete in two stages according to the scheme;
4. the arrangement of the anti-floating assembly has a limiting effect on the hole penetrating steel pipe, and the floating of the hole penetrating steel pipe is limited within the range allowed by construction errors; and the condition that the anti-floating component falls off in a touching manner in the process that the hole-penetrating steel pipe penetrates into the concrete pipe is avoided. The operator can measure the slight floating amount of the hole penetrating steel pipe to judge the degree of backfilling concrete.
Drawings
FIG. 1 is a schematic illustration of an annular zone region of the present invention showing two stages of concrete and grout areas;
FIG. 2 is a schematic diagram showing the positional relationship among the anti-drift assembly, the concrete pipe and the hole-penetrating steel pipe;
FIG. 3 is a schematic view of a casting process;
FIG. 4 is an exploded view of the connection of the sleeve, the input tube and the pouring tube;
fig. 5 is a schematic structural view of the anti-floating assembly.
Reference numerals: 1. a concrete pipe; 2. penetrating a steel pipe through the hole; 3. an annular space layer; 31. first-stage concrete; 32. second-stage concrete; 33. a pulp replenishing area; 4. grouting an ash hole; 41. a sleeve; 42. an input tube; 43. pouring a pipe; 5. an anti-drift device; 51. a connecting plate; 52. a bottom supporting plate; 53. supporting the reinforcing steel bars; 54. an outer supporting plate; 6. a grouting pipe; 7. an exhaust pipe; 8. an observation hole; 9. and (5) hooping.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): a construction method for pouring concrete behind a hole penetrating steel pipe 2 comprises the following construction steps:
step 1, preparation: referring to fig. 2 and 3, an exhaust pipe 7 and a grouting pipe 6 are installed at the top of an annular layer 3 of the through hole steel pipe 2 and the concrete pipe 1, the exhaust pipe 7 and the grouting pipe 6 are arranged in a through manner, and two ends of the exhaust pipe penetrate through the end of the through hole steel pipe 2; and (4) plugging by building walls on the annular space layers 3 at the two ends of the hole penetrating steel pipe 2. A plurality of ash pouring openings 4 are formed at the top end of the hole penetrating steel pipe 2 at intervals, and the distance is 3 m. Two sets of ground pump systems are installed at two ends of the hole penetrating steel pipe 2, and two pouring pipes 43 are installed to the middle position from two ports of the hole penetrating steel pipe 2 respectively.
Referring to fig. 2 and 3, in the retreating type pouring process, before pouring, two ends of the hole penetrating pipe are plugged, an end observation opening is reserved at the top of the wall, and a plurality of observation holes 8 which are symmetrically arranged with the central axis of the hole penetrating steel pipe 2 are formed in the middle of the hole penetrating steel pipe 2 at intervals. And installing an anti-floating device 5 at the arch crown of the concrete pipe 1, wherein the distance from the bottom end of the anti-floating device 5 to the top end of the hole penetrating steel pipe 2 is 10mm, and establishing a measuring system. The anti-floating device 5 is not overlapped with the mortar filling opening 4. During the observation, touch the inside temperature sensing cooperation of hole penetrating steel pipe 2, the hole 8 is observed at the middle part, and flashlight cooperation cell-phone video recording. Meanwhile, monitoring the vertical displacement below the next grouting port 4 of the grouting ports 4; and a measurement control point is arranged below each mortar pouring opening 4, the observation is carried out for 1 time every 5 minutes when concrete is poured, and when the through-hole steel pipe 2 at the position floats upwards for 10mm, the pouring pipe 43 is moved to the next mortar pouring opening 4. Combining the square amount calculation, determining the time for replacing the ash pouring port 4 by multiple means; after the first-stage concrete 31 is poured, the middle observation hole 8 is blocked.
Observation when pouring the second stage concrete 32: by means of the induction and matching of the temperature inside the through steel pipe 2 by touching the hole, a video is recorded from the top ash pouring opening 4 by matching of a flashlight and a mobile phone, and the concrete pouring condition is observed by multiple means in combination with the square amount calculation; and finally, observing the concrete condition by using the end observation port, and plugging the end observation port after the pouring is finished.
The following work is also required to be completed during the self-compacting concrete pouring of each mortar pouring opening 4: preparing for next pouring of the mortar pouring opening 4; and cleaning the leaked concrete after the former pouring pipe 43 is changed.
And step 4, grouting construction: with reference to fig. 2 and 5, the float preventer 5 comprises a top connecting plate 51, a bottom gusset plate 52 and three vertical support bars 53 welded between the gusset plate 52 and the connecting plate 51; the connecting plate 51 is fixed at the top end of the annular layer 3 by adopting an expansion bolt; the distance between the bottom supporting plate 52 and the top end of the hole penetrating steel pipe 2 is 10 mm; two horizontal outward external supporting plates 54 which are symmetrical in the middle axis are respectively welded on the two supporting steel bars 53. The grouting pipe 6 and the exhaust pipe 7 are placed on the outer supporting plate 54 and welded; grouting is simultaneously performed into the grouting pipes 6 from both ends of the annular layer 3, and the top cavity is completely filled with grout. Specifically, the grouting pipe 6 is a dn50 steel perforated pipe, the distance between drilled holes along the pipe wall is 0.5m, the holes are arranged in a quincunx shape, the hole positions mutually form an angle of 90 degrees, the hole diameter is 6-8 mm, and an adhesive tape is applied to wind before grouting to prevent pipe blockage. The exhaust pipe 7 is made of dn50 steel perforated pipes, the distance between drilled holes along the pipe wall is 0.3m, the holes are arranged in a quincunx shape, the hole positions mutually form 90 degrees, and the aperture is 10-15 mm. And during grouting, high-pressure grouting is adopted until the exhaust pipe 7 begins to reserve cement paste, and grouting is stopped when the slurry reserving speed is equal to the grouting speed.
And step 5, antiseptic treatment: referring to fig. 3, the mortar inlet 4 closed with the cap is subjected to an anticorrosive treatment.
The implementation principle is as follows: the arrangement of the anti-floating component has a limiting effect on the hole penetrating steel pipe 2, and the floating of the hole penetrating steel pipe 2 is limited within the range allowed by construction errors; and the condition that the anti-floating component falls off due to touch in the process of penetrating the hole-penetrating steel pipe 2 into the concrete pipe 1 is avoided. The operator can judge the degree of backfilling concrete by measuring the slight floating amount of the hole penetrating steel pipe 2. The connecting plate 51 facilitates the connection of the anti-floating component and the top of the inner wall of the concrete pipe 1, increases the contact area of the anti-floating component and the inner wall of the concrete pipe 1, and enhances the compressive strength of the contact part of the anti-floating component and the concrete pipe 1; when the through-hole steel pipe 2 floats upwards, the bottom bracing plate 52 increases the abutting area of the anti-floating assembly on the through-hole steel pipe 2; the three vertical supporting steel bars 53 are arranged in a triangle, so that the bending resistance of the anti-floating component is enhanced; the horizontally arranged outer supporting plate 54 realizes the fixation of the exhaust pipe 7 and the grouting pipe 6 on the top of the inner wall of the concrete pipe 1, and facilitates the installation and fixation of the exhaust pipe 7 and the grouting pipe 6.
Compared with the one-time pouring in the technical scheme, the scheme has the advantages that the concrete is poured in two stages, after the first-stage pouring is finished, the backfilled self-sealing concrete has a certain height, when the second-stage pouring is carried out, the backfilled concrete at the position of the ash filling opening 4 after the second-stage pouring is finished flows to an area which is not subjected to the second-stage backfilling, the height difference between the ash filling opening 4 and the position which is not subjected to the ash filling is reduced, the height reduction range of the backfilled concrete at the position of the ash filling opening 4 is reduced, the empty layer at the top of the backfilled concrete is reduced, the grout filling amount is reduced, and the strength of the backfilled concrete of the annular empty layer 3 is ensured. Concrete pouring is carried out in two stages, so that the height difference between the ash pouring openings 4 and the ash pouring positions is reduced, operators can better master the ash pouring size, and the control of the operators on the ash pouring time and the ash pouring amount of each ash pouring opening 4 is enhanced.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A construction method for pouring concrete behind a hole-penetrating steel pipe is characterized by comprising the following steps: the method comprises the following construction steps:
step 1, preparation: an exhaust pipe (7) and a grouting pipe (6) are installed at the tops of the hole-penetrating steel pipe (2) and the annular layer (3) of the concrete pipe (1), the exhaust pipe (7) and the grouting pipe (6) are arranged in a through manner, and two ends of the exhaust pipe penetrate through the end of the hole-penetrating steel pipe (2); building a wall on the annular layers (3) at the two ends of the hole penetrating steel pipe (2) for plugging; a plurality of ash pouring openings (4) are formed at intervals at the top end of the hole penetrating steel pipe (2); two sets of ground pump systems are arranged at two ends of the hole penetrating steel pipe (2), and two pouring pipes (43) are respectively arranged to the middle position from two ports of the hole penetrating steel pipe (2);
step 2, pouring first-stage concrete (31): two sets of ground pump pouring pipes (43) are respectively communicated with two adjacent grouting openings (4) in the middle of the hole penetrating steel pipe (2) to start pouring; when the height of the pouring section of concrete is close to the middle height of the tunnel penetration steel pipe (2), the pouring pipe (43) is moved to the next cement pouring port (4), then the pouring step is repeated, and backward pouring is carried out from the middle to two ends of the tunnel penetration steel pipe (2) until all the annular layer (3) below the middle height of the whole section of tunnel penetration steel pipe (2) is poured with concrete; before concrete is poured, an anti-floating device (5) is arranged at the arch crown of the concrete pipe (1), and the distance between the bottom end of the anti-floating device (5) and the top end of the hole penetrating steel pipe (2) is 10 mm; when first-stage concrete (31) is poured, monitoring the vertical displacement below the next mortar pouring port (4) of the mortar pouring port (4) which is being poured, and when the through-hole steel pipe (2) at the position floats upwards by 10mm, moving the pouring pipe (43) to the next mortar pouring port (4); a plurality of observation holes (8) symmetrically arranged by using the central axis of the hole penetrating steel pipe (2) are formed in the middle of the hole penetrating steel pipe (2) at intervals, and in the primary concrete (31) pouring process, concrete in the annular hollow layer (3) is observed from two observation holes (8) at the same position, so that the heights of the concrete at two sides of the hole penetrating steel pipe (2) are approximately the same; the flashlight and the mobile phone are inserted into the observation hole (8), and videos are recorded by the mobile phone to observe the concrete pouring condition and the pouring height; before the second-stage concrete (32) is poured, the observation hole (8) is permanently sealed;
and 3, pouring secondary concrete (32): two sets of pouring pipes (43) are installed to the middle position of the hole penetrating steel pipe (2) again and are respectively communicated with two adjacent grouting openings (4) in the middle of the hole penetrating steel pipe (2) to start pouring; when the next mortar pouring port (4) leaks mortar evenly and stably, stopping pouring, moving the pouring pipe (43) to the next mortar pouring port (4), and permanently plugging the mortar pouring port (4) which finishes pouring by using a sealing cover; then, the pouring step is repeated, retreating pouring is carried out, and concrete is completely poured from the middle to two ends of the tunnel-penetrating steel pipe (2) until the annular empty layer (3) below the height of the mortar pouring opening (4) of the whole tunnel-penetrating steel pipe (2);
and step 4, grouting construction: grouting is simultaneously carried out in the grouting pipe (6) from two ends, and the top cavity is completely filled with grout;
and step 5, antiseptic treatment: and (4) performing antiseptic treatment on the ash pouring opening (4) after the sealing cover is closed.
2. The construction method for pouring concrete behind a hole-penetrating steel pipe as claimed in claim 1, wherein: in the retreating type pouring process, walls are built at two ends of the through hole pipe to be plugged, and an end observation port is reserved at the top of the wall;
observation when first-stage concrete (31) was poured: the time for replacing the ash pouring port (4) is determined by multiple means of temperature induction matching inside the hand-touch hole-penetrating steel pipe (2), observation through a middle observation hole (8), video recording through manual and electric cooperation with a mobile phone, vertical displacement monitoring of measuring staff, and square amount calculation; after the first-stage concrete (31) is poured, the middle observation hole (8) is plugged;
pouring second-stage concrete (32): before the second concrete is poured, the interval time is a period of time, and after the initial setting of the concrete, the second-stage concrete (32) can be poured; meanwhile, the pouring pipe (43) used in the first pouring of concrete is cleaned up, or a new pouring pipe (43) is replaced for pouring;
a ground pump pouring pipe (43) is installed in the hole penetrating steel pipe (2) again, and the two sets of ground pump systems are installed to the middle position from the two ports respectively and are communicated with the two adjacent grouting openings (4) in the middle; pouring each mortar pouring opening (4) in sequence until the next mortar pouring opening (4) is subjected to uniform and stable mortar bleeding according to the standard of each mortar pouring opening (4); then plugging the cement pouring port (4), and transferring to the next cement pouring port (4) until the pipe orifice of the hole-penetrating steel pipe is reached;
observation when pouring secondary concrete (32): the temperature inside the through steel pipe (2) is touched by hands to be matched in a sensing way, a video is recorded from the top ash pouring opening (4) by matching a flashlight with a mobile phone, and the concrete pouring condition is observed by multiple means in combination with the square amount calculation; and finally, observing the concrete condition by using the end observation port, and plugging the end observation port after the pouring is finished.
3. The construction method for pouring concrete behind a hole-penetrating steel pipe as claimed in claim 1, wherein: and high-pressure grouting is adopted during grouting, the grouting pressure change is noticed, and the grouting is stopped when the slurry is reserved from the exhaust pipe (7) at a speed equal to the grouting speed.
4. The construction method for pouring concrete behind a hole-penetrating steel pipe as claimed in claim 2, wherein: a sleeve (41) is welded at the position of the mortar pouring opening (4) in advance, the sleeve (41) is provided with an internal thread, an input pipe (42) with an external thread is screwed into the sleeve (41) when concrete is poured, and the bottom of the input pipe (42) is connected with a ground pump pouring pipe (43) through a hoop (9); the sealing cover for sealing the ash pouring opening (4) is also provided with threads, and when the ash pouring opening (4) is sealed, the sealing cover is screwed into the ash pouring opening (4).
5. The construction method for pouring concrete behind a hole-penetrating steel pipe as claimed in claim 1, wherein: the anti-floating device (5) comprises a top connecting plate (51), a bottom supporting plate (52) at the bottom and three vertical supporting steel bars (53) welded between the bottom supporting plate (52) and the connecting plate (51); the connecting plate (51) is fixed at the top end of the annular layer (3) by adopting an expansion bolt; the distance between the bottom supporting plate (52) and the top end of the hole penetrating steel pipe (2) is 10 mm; two horizontal outward outer supporting plates (54) which are symmetrical in the middle shaft are welded on the two supporting steel bars (53) respectively;
grouting pipes (6) and exhaust pipes (7) are respectively placed on the two outer supporting plates (54), the upper surfaces of the grouting pipes (6) and the outer supporting plates (54) are welded, and the upper surfaces of the exhaust pipes (7) and the other outer supporting plate (54) are welded.
6. The construction method for pouring concrete behind a hole-penetrating steel pipe as claimed in claim 2, wherein: the following work is required to be completed during the self-compacting concrete pouring process of each mortar pouring opening (4): preparing for the next mortar pouring opening (4) before pouring; and cleaning the leaked concrete after the former pouring pipe (43) is changed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911062412.7A CN110984153B (en) | 2019-11-02 | 2019-11-02 | Construction method for pouring concrete behind hole-penetrating steel pipe |
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| CN201911062412.7A CN110984153B (en) | 2019-11-02 | 2019-11-02 | Construction method for pouring concrete behind hole-penetrating steel pipe |
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| CN110984153B true CN110984153B (en) | 2021-04-06 |
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