Construction method for hole cleaning and pouring of steel casing

Abstract

The invention provides a construction method for hole cleaning and pouring of a steel casing, and belongs to the technical field of steel casing pouring. The distance between the two steel casings is closed through the two steel sheet piles, and therefore the situation of collapse is avoided when punching and hole cleaning are conducted on an area defined by the two steel casings and the two steel sheet piles subsequently. Concrete is poured into the seamless steel pipe, so that the concrete flows to the bottom of an area defined by the two steel casings and the two steel sheet piles along the seamless steel pipe, and the bottom of the area is blocked by the concrete; and meanwhile, a gap between the steel sheet pile and the steel casing can be sealed through the concrete column formed by pouring in the seamless steel pipe, so that the situation of hole collapse in the punching process is further avoided, the situations of hole forming difficulty, drill jamming and drill burying are avoided, the construction efficiency is improved, the hole cleaning depth can be ensured, and the product construction effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of steel casing pouring, and in particular relates to a construction method for steel casing hole cleaning and pouring. Background Art

[0002] In the relevant technology, during the construction of the hydraulic wharf, the lower geology of the construction area is silty silty clay and coral debris mixed with coral fragments; since the silty silty clay is in a fluid plastic state, and there are pores in the coral debris mixed with coral fragments, under the action of seawater flow, the coral sand flows into the pores, causing collapse to easily occur during the hole cleaning process, which in turn leads to difficulties in hole formation, and easy occurrence of drill sticking and drill burial, resulting in slow construction. Summary of the Invention

[0003] In order to solve the problem in the above-mentioned prior art that collapse is easy to occur during the hole cleaning process, which leads to difficulty in hole formation, and is prone to drill jamming and buried drill, resulting in slow construction, the present invention provides a construction method for steel casing hole cleaning and grouting, which adopts the method of pouring concrete into a seamless steel pipe to achieve concrete flow along the seamless steel pipe to the bottom of the area surrounded by two steel casings and two steel sheet piles, thereby achieving concrete blocking of the bottom of the area, and at the same time, using the concrete column poured into the seamless steel pipe to seal the gap between the steel sheet pile and the steel casing, further avoiding the occurrence of hole collapse during the punching process, avoiding difficulty in hole formation, drill jamming and buried drill, thereby improving construction efficiency, and ensuring the hole cleaning depth, thereby improving the construction effect of the product. Its specific technical solution is: A construction method for steel casing hole cleaning and grouting, the construction method for steel casing hole cleaning and grouting includes: S1, rolling the construction area and the equipment driving range by a vibratory roller; at the same time, planning the equipment driving route so that the equipment driving route is at a certain distance from the predetermined drilling area; S2, locating multiple predetermined drilling positions by laser positioning; S3, inserting a steel casing with a lock buckle welded on the side wall into the ground by a crawler-type hydraulic punching and pulling mechanism, so that the center of the steel casing coincides with the predetermined drilling position, the lock buckles of two adjacent steel casings are not on the same plane, and there is a distance between the lock buckles of the steel casing and the adjacent steel casings; S4, punching at the predetermined drilling position by a crawler-type engineering drilling rig, and cleaning the hole at the predetermined drilling position; S5, pouring concrete in the steel casing; S6, in the construction area In the area, the driving position of the steel sheet pile is marked, and the steel sheet pile is driven into the ground by a crawler-type hydraulic driving and pulling machine, so that the two steel sheet piles are respectively fitted with the lock buckles of the two adjacent steel casings, and the steel sheet piles close the gap between the lock buckles of the steel casing and the adjacent steel casings; S7, two seamless steel pipes are driven between the lock buckles of the two adjacent steel casings; S8, punching and cleaning holes in the seamless steel pipes; S9, pouring concrete in the seamless steel pipes; S10, after pouring is completed, the seamless steel pipes are pulled out before initial setting; S11, 24 hours later, punching and cleaning holes between the lock buckles of the two adjacent steel casings are performed by a pneumatic down-the-hole hammer; S12, concrete is poured between the lock buckles of the two adjacent steel casings; S13, after pouring is completed, the steel sheet piles and the steel casings are pulled out in turn by a crawler-type hydraulic driving and pulling machine.

[0004] In addition, the construction method of the steel casing hole cleaning and grouting in the above technical solution provided by the present invention may also have the following additional technical features: In the above technical solution, the construction method for cleaning and grouting the steel casing further includes: in step S6, the specific steps are as follows: S6.1, drawing the center line of the pile in the construction area; S6.2, inspecting the steel sheet piles one by one, and removing the steel sheet piles that are seriously corroded or deformed; S6.3, clamping the upper end of the steel sheet pile by the vibrating hammer of the crawler-type hydraulic driving and pulling machine, and making the center of gravity of the vibrating hammer and the center of gravity of the steel sheet pile on the same straight line, and the vibration frequency of the vibrating cone is constant. The rate is greater than the natural frequency of the steel sheet pile; S6.4, insert the steel sheet pile vertically into the center line of the pile by using a vibratory hammer; after the steel sheet pile is stable, use the vibratory hammer to vibrate and sink the steel sheet pile; S6.5, stop vibrating the steel sheet pile every time the steel sheet pile sinks 1 to 2 meters, and check the verticality of the steel sheet pile to ensure that the verticality of the steel sheet pile is between 88 degrees and 92 degrees; when the verticality of the steel sheet pile is not between 88 degrees and 92 degrees, remove the steel sheet pile and repeat step S6.4.

[0005] In the above technical solution, in step S6.4, during the sinking process of the steel sheet pile, if the sinking speed of the steel sheet pile suddenly decreases, the steel sheet pile stops sinking; after the steel sheet pile is pulled up by 0.6 to 1 m, the steel sheet pile is vibrated and sunk again.

[0006] In the above technical solution, the construction method for cleaning and grouting the steel casing also includes: in step S13, the specific steps are as follows: S13.1, the vibratory hammer of the crawler-type hydraulic driving and pulling machine is used to clamp the upper end of the steel sheet pile, and the steel sheet pile is vibrated for 1 minute to 2 minutes; S13.2, the vibratory hammer of the crawler-type hydraulic driving and pulling machine is used to drive the steel sheet pile to vibrate upward; wherein, in step S13.2, the load condition of the crawler-type hydraulic driving and pulling machine is observed, and if it is found that the steel sheet pile is difficult to pull up, the upward vibration of the steel sheet pile is stopped; then, after vibrating the steel sheet pile for 1 minute to 2 minutes, the steel sheet pile is hammered down 0.5 to 1m, and step S13.2 is repeated.

[0007] In the above technical solution, the construction method of the steel casing hole cleaning and grouting also includes: in step S12, the specific steps are as follows: S12.1, inspecting the inner and outer walls of the casting conduit to ensure that the inner wall of the casting conduit is smooth and round, and that the inner diameter of the casting conduit is consistent, the interface is tight, and there is no local unevenness; S12.2, performing trial assembly and pressure test on the casting conduit; ensuring that the axis deviation of the casting conduit does not exceed 0.5% of the drilling depth and is not greater than 10 cm; when the casting conduit is pressure tested, the test pressure is 0.7 MPa, and the pressure is maintained for 10 minutes; if there is no leakage, it proves that the casting conduit can continue to be poured. Continue to use; if there is leakage, it proves that the pouring conduit cannot continue to be used; S12.3, place the pouring conduit between the lock buckles of two adjacent steel casings, so that the distance between the bottom of the pouring conduit and the bottom of the hole is 300 to 400 mm; S12.4, pour concrete into the pouring conduit, so as to pour the area between the lock buckles of two adjacent steel casings; during the pouring process, the pouring conduit should be buried in the concrete to a depth of 4 to 6m; S12.5, in the last pouring, the concrete surface needs to be poured to the design elevation; among them, the inner diameter of the pouring conduit is 146mm, and the pouring conduit is a threaded conduit.

[0008] In the above technical solution, in step S12.3, the casting conduit is located in the central position between the lock buckles of two adjacent steel casings; when lowering the casting conduit, the casting conduit is first placed at the bottom of the hole; then, the casting conduit is moved upward by 300 to 400 mm to reserve sufficient casting space.

[0009] In the above technical solution, in step S12.4, fine stone concrete should be used for pouring concrete; the water-cement ratio of the concrete is 0.5 to 0.55, the slump is 180 to 220 mm, and the initial setting time is not less than 6 hours; wherein, during the pouring process, the staff uses a measuring rope to measure the rise of the concrete liquid level multiple times and keep records to prevent the pouring conduit from being blocked; at the same time, the staff randomly checks the slump of the concrete.

[0010] In the above technical solution, in step S12.4, continuous pouring is adopted during the pouring of concrete; the transportation time of concrete is controlled within 0.5 hours, and the pouring is completed within 0.5 hours after the concrete arrives at the site; the total time of concrete pouring does not exceed the initial setting time of the first concrete pouring.

[0011] Compared with the prior art, the construction method of the steel casing cleaning and grouting of the present invention has the following beneficial effects: 1. By aligning two steel sheet piles with the locking clips of two adjacent steel casings, the two steel sheet piles close the gap between the two steel casings, thereby preventing collapse during subsequent punching and cleaning of the area enclosed by the two steel casings and the two steel sheet piles. Furthermore, compared to punching with a high-pressure water gun or cleaning with reverse circulation, this method not only ensures the designed depth is reached, but also improves construction efficiency. By pouring concrete within the seamless steel pipe, the concrete flows along the seamless steel pipe to the bottom of the area enclosed by the two steel casings and the two steel sheet piles, thereby sealing the bottom of the area. Concrete columns cast within the seamless steel pipe seal the gap between the steel sheet piles and the steel casing, further preventing collapse during the punching process, preventing difficulties in drilling, drill sticking, and drill burial, thereby improving construction efficiency and ensuring the proper cleaning depth, resulting in a superior product finish.

[0012] 2. Steps S6.1 and S6.2 are used to improve the accuracy of the steel sheet pile driving position and prevent the quality of the steel sheet pile from affecting its ability to close the gap between two adjacent steel casings. Steps S6.3 and S6.4 are used to drive the steel sheet pile into the predetermined position. Compared to driving the steel sheet column by impact, this can prevent the steel sheet pile from being deformed due to excessive force. This not only ensures the sealing effect of the steel sheet pile, but also facilitates subsequent reuse of the steel sheet pile, thereby improving the user experience of the product. Step S6.5 can improve the verticality of the steel sheet pile driving, thereby improving the effectiveness of the steel sheet pile in closing the gap between two adjacent steel casings.

[0013] 3. Step S6.4 ensures that when the steel sheet pile encounters hard soil, it can break up the hard soil. This prevents the crawler hydraulic driving and extracting machine from being overloaded and causing damage. At the same time, it also ensures that the steel sheet pile can be driven smoothly, thereby improving the user experience of the product.

[0014] 4. Step S13.1 is implemented to loosen the soil around the steel sheet piles, reducing their resistance to the piles and making them easier to extract. The load on the crawler-type hydraulic driving and extraction machine is then used to determine the difficulty of pulling out the steel sheet piles, thereby determining whether hard soil is encountered during the extraction process. If the steel sheet piles encounter hard soil, the piles are vibrated for 1 to 2 minutes and hammered down 0.5 to 1 meter to break up the hard soil, ensuring smooth subsequent extraction and enhancing the user experience.

[0015] 5. Step S12.1 is performed to prevent the flow rate of concrete in the pouring conduit from being reduced due to damage to the pouring conduit, thereby improving the concrete pouring effect. Step S12.2 is performed to detect the verticality and pressure resistance of the pouring conduit, thereby ensuring that the concrete can flow vertically downward, thereby preventing the concrete from hitting the pouring conduit and thus damaging the pouring conduit. At the same time, it can also prevent concrete leakage, thereby improving the concrete pouring effect. Steps S12.3 and S12.4 are performed to ensure that there is sufficient pouring space during the initial pouring, thereby ensuring sufficient concrete reserves so that the subsequent pouring conduit can be embedded in the concrete, further improving the concrete pouring effect.

[0016] 6. By placing the pouring conduit in the center between the lock buckles of two adjacent steel casings, the concrete poured by the pouring conduit can overflow from the center to the surrounding areas, thereby improving the concrete pouring effect; by placing the pouring conduit at the bottom of the hole first and then moving the pouring conduit upward by 300 to 400 mm, it is ensured that there is enough pouring space during the initial pouring, thereby ensuring sufficient concrete reserves so that the subsequent pouring conduit can be embedded in the concrete, further improving the concrete pouring effect.

[0017] 7. By setting the concrete to fine stone concrete, continuous pouring can be achieved during concrete pouring, and it can adapt to the smaller inner diameter of the pouring conduit, thereby improving the user experience of the product; by having the staff measure the rise of the concrete liquid level multiple times, it is possible to determine whether there is a blockage in the conduit through the rise of the liquid level, so that the blockage problem in the pouring conduit can be solved in the first place, avoiding taking up the time of subsequent pouring, thereby improving the construction efficiency of the product.

[0018] 8. By controlling the transportation time of concrete within 0.5 hours and ensuring that the pouring of concrete is completed within 0.5 hours after arriving at the site, the concrete can be poured at the predetermined location in a short time, thereby avoiding the setting of the concrete before pouring and further improving the effect of concrete pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is one of the flow charts of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 2 This is the second flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 3 This is the third flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 4 This is a fourth flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 5 This is the fifth flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 6 This is the sixth flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 7 This is the seventh flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 8 This is the eighth flow chart of a construction method for cleaning and pouring steel casing holes according to the present invention; Figure 9 A perspective view of the steel casing, locking buckle, steel sheet pile and seamless steel pipe of the present invention; in, Figure 9 The corresponding relationship between the reference numerals and component names is as follows: 10 steel casing, 20 lock buckles, 30 steel sheet piles, 40 seamless steel pipes. DETAILED DESCRIPTION

[0020] The following is a combination of specific implementation cases and attached Figures 1 to 9 The present invention is further described below, but the present invention is not limited to these embodiments.

[0021] A construction method for steel casing hole cleaning and grouting, such as Figure 1 and Figure 9As shown, the construction method of steel casing cleaning and grouting includes: S1, rolling the construction area and the equipment driving range by a vibratory roller; at the same time, planning the equipment driving route so that the equipment driving route is at a certain distance from the predetermined drilling area; S2, locating multiple predetermined drilling positions by laser positioning; S3, inserting the steel casing 10 with the lock buckle 20 welded on the side wall into the ground by a crawler-type hydraulic driving and pulling mechanism, so that the center of the steel casing 10 coincides with the predetermined drilling position, the lock buckles 20 of the two adjacent steel casings 10 are not on the same plane, and there is a distance between the lock buckles 20 of the steel casing 10 and the adjacent steel casings 10; S4, punching at the predetermined drilling position by a crawler-type engineering drilling rig, and cleaning the hole at the predetermined drilling position; S5, pouring concrete in the steel casing 10; S6, marking the piling position of the steel sheet pile 30 in the construction area, and The belt-type hydraulic driving and pulling machine drives the steel sheet piles 30 into the ground, so that the two steel sheet piles 30 are respectively fitted with the lock buckles 20 of the two adjacent steel casings 10, and the steel sheet piles 30 close the gap between the lock buckles 20 of the steel casings 10 and the adjacent steel casings 10; S7, two seamless steel pipes 40 are driven between the lock buckles 20 of the two adjacent steel casings 10; S8, punching and cleaning are performed in the seamless steel pipes 40; S9, concrete is poured into the seamless steel pipes 40; S10, after pouring is completed, the seamless steel pipes 40 are pulled out before initial setting; S11, 24 hours later, the steel sheet piles 30 and the steel casings 10 are punched and cleaned between the lock buckles 20 of the two adjacent steel casings 10 by a pneumatic down-the-hole hammer; S12, concrete is poured between the lock buckles 20 of the two adjacent steel casings 10; S13, after pouring is completed, the steel sheet piles 30 and the steel casings 10 are pulled out in sequence by the crawler-type hydraulic driving and pulling machine.

[0022] Through step S1, the firmness of the soil in the construction area is improved, thereby improving the stability of subsequent construction; at the same time, by ensuring that the equipment driving route is at a certain distance from the predetermined drilling area, the vibration generated by the equipment driving is prevented from affecting the stability of the hole wall; through steps S2 and S3, the steel casing 10 is inserted into the predetermined position, thereby improving the accuracy of the construction position of the steel casing 10; through steps S4 and S5, the concrete pier is cast in the steel casing 10. Through step S6, the position of the steel sheet pile 30 is preliminarily positioned by the lock 20. At the same time, by marking the piling position of the steel sheet pile 30, the position of the steel sheet pile 30 can be accurately positioned, thereby ensuring that the steel sheet pile 30 can seal the area between two adjacent steel casings 10. Through steps S7 to S9, concrete is poured into the bottom of the area enclosed by the two steel casings 10 and the two steel sheet piles 30, so that the concrete seals the bottom of the area. At the same time, by pouring concrete into the seamless steel pipe 40, a concrete column is formed in the seamless steel pipe 40 to seal the gap between the steel sheet pile 30 and the steel casing 10. Through steps S10 to S12, the remaining part is poured. Through step S13, the steel sheet pile 30 and steel casing 10 are collected, thereby realizing the reuse of the steel sheet pile 30 and steel casing 10.

[0023] The above structure allows two steel sheet piles 30 to be fitted with the locking buckles 20 of two adjacent steel casings 10, respectively, so that the two steel sheet piles 30 close the gap between the two steel casings 10. This prevents collapse during subsequent punching and cleaning of the area enclosed by the two steel casings 10 and the two steel sheet piles 30. Furthermore, compared to punching with a high-pressure water gun or cleaning with a reverse circulation method, this structure not only ensures that the designed depth is reached, but also improves construction efficiency. Concrete is poured into the seamless steel pipe 40, allowing the concrete to flow along the seamless steel pipe 40 to the bottom of the area enclosed by the two steel casings 10 and the two steel sheet piles 30, thereby sealing the bottom of the area. Concrete columns poured into the seamless steel pipe 40 can also close the gap between the steel sheet piles 30 and the steel casing 10, further preventing collapse during the punching process, preventing drilling difficulties, drill sticking, and drill embedment, thereby improving construction efficiency and ensuring the proper cleaning depth, thus enhancing the product's construction effect.

[0024] Specifically, the lower geology of the construction area is silty clay and coral debris mixed with coral fragments; because the silty clay is in a fluid plastic state, and there are pores in the coral debris mixed with coral fragments.

[0025] In an embodiment of the present invention, Figure 2 and Figure 9As shown, the construction method for cleaning and grouting the steel casing further includes: in step S6, the specific steps are as follows: S6.1, drawing a pile center line in the construction area; S6.2, inspecting the steel sheet piles 30 one by one, and removing the steel sheet piles 30 that are severely corroded or deformed; S6.3, clamping the upper end of the steel sheet pile 30 by the vibrating hammer of the crawler-type hydraulic driving and pulling machine, and making the center of gravity of the vibrating hammer and the center of gravity of the steel sheet pile 30 on the same straight line, and the vibration frequency of the vibrating cone is greater than the vibration frequency of the steel sheet pile 30. Natural frequency; S6.4, insert the steel sheet pile 30 vertically into the center line of the pile by a vibratory hammer; after the steel sheet pile 30 is stable, use the vibratory hammer to vibrate and sink the steel sheet pile 30; S6.5, every time the steel sheet pile 30 sinks 1 to 2 meters, stop vibrating the steel sheet pile 30 and check the verticality of the steel sheet pile 30 to ensure that the verticality of the steel sheet pile 30 is between 88 degrees and 92 degrees; when the verticality of the steel sheet pile 30 is not between 88 degrees and 92 degrees, remove the steel sheet pile 30 and repeat step S6.4.

[0026] By performing steps S6.1 and S6.2, the accuracy of the steel sheet pile 30 driving position is improved, and the effect of the steel sheet pile 30 closing the gap between two adjacent steel casings 10 is prevented from being affected by the quality of the steel sheet pile 30. By performing steps S6.3 and S6.4, the steel sheet pile 30 is driven into the predetermined position. Compared with driving the steel sheet column by impact, the steel sheet pile 30 can be prevented from being deformed due to excessive force applied to the steel sheet pile 30. This not only ensures the sealing effect of the steel sheet pile 30, but also facilitates the subsequent reuse of the steel sheet pile 30, thereby improving the user experience of the product. By performing step S6.5, the verticality of the steel sheet pile 30 driving can be improved, thereby improving the effect of the steel sheet pile 30 closing the gap between two adjacent steel casings 10.

[0027] In an embodiment of the present invention, Figure 3 and Figure 9 As shown, in step S6.4, during the sinking process of the steel sheet pile 30, if the sinking speed of the steel sheet pile 30 suddenly decreases, the steel sheet pile 30 stops sinking; after the steel sheet pile 30 is pulled up by 0.6 to 1 m, the steel sheet pile 30 is vibrated and sunk again.

[0028] Through step S6.4, when the steel sheet pile 30 encounters hard soil, the steel sheet pile 30 can break up the hard soil, thereby avoiding the crawler hydraulic driving and pulling machine from being overloaded and causing damage to the crawler hydraulic driving and pulling machine. At the same time, it can also ensure that the steel sheet pile 30 can be driven smoothly, thereby improving the product user experience.

[0029] In an embodiment of the present invention, Figure 4 and Figure 9As shown, the construction method for cleaning and grouting the steel casing also includes: in step S13, the specific steps are as follows: S13.1, the vibrating hammer of the crawler-type hydraulic driving and pulling machine is used to clamp the upper end of the steel sheet pile 30, and vibrate the steel sheet pile 30 for 1 minute to 2 minutes; S13.2, the vibrating hammer of the crawler-type hydraulic driving and pulling machine is used to drive the steel sheet pile 30 to vibrate upward; wherein, in step S13.2, the load condition of the crawler-type hydraulic driving and pulling machine is observed, and if it is found that the steel sheet pile 30 is difficult to pull up, the upward vibration pulling of the steel sheet pile 30 is stopped; then, after vibrating the steel sheet pile 30 for 1 minute to 2 minutes, the steel sheet pile 30 is hammered downward by 0.5 to 1 m, and step S13.2 is repeated.

[0030] By performing step S13.1, the soil surrounding the steel sheet pile 30 is loosened, thereby reducing the soil's resistance to the steel sheet pile 30 and making it easier to extract the steel sheet pile. By observing the load on the crawler-type hydraulic driving and extraction machine, the difficulty of extracting the steel sheet pile 30 is determined, thereby determining whether hard soil is encountered during the extraction process. If the steel sheet pile 30 encounters hard soil, the steel sheet pile 30 is vibrated for 1 to 2 minutes and hammered down 0.5 to 1 meter to break up the hard soil, ensuring smooth subsequent extraction of the steel sheet pile 30 and improving the user experience of the product.

[0031] In an embodiment of the present invention, Figure 5 and Figure 9 As shown, the construction method of the steel casing hole cleaning and grouting also includes: in step S12, the specific steps are as follows: S12.1, inspecting the inner and outer walls of the casting conduit to ensure that the inner wall of the casting conduit is smooth and round, and that the inner diameter of the casting conduit is consistent, the interface is tight, and there is no local unevenness; S12.2, performing trial assembly and pressure test on the casting conduit; ensuring that the axis deviation of the casting conduit does not exceed 0.5% of the drilling depth and is not greater than 10 cm; when the casting conduit is pressure tested, the test pressure is 0.7 MPa, and the pressure is maintained for 10 minutes; if there is no leakage, it proves that the casting conduit can continue to be used; if there is leakage Leakage proves that the pouring conduit cannot be used any further; S12.3, place the pouring conduit between the lock buckles 20 of two adjacent steel casings 10, so that the distance between the bottom of the pouring conduit and the bottom of the hole is 300 to 400 mm; S12.4, pour concrete into the pouring conduit, thereby pouring the area between the lock buckles 20 of two adjacent steel casings 10; during the pouring process, the pouring conduit should be buried in the concrete to a depth of 4 to 6 m; S12.5, during the last pouring, the concrete surface needs to be poured to the design elevation; among them, the inner diameter of the pouring conduit is 146 mm, and the pouring conduit is a threaded conduit.

[0032] Through step S12.1, the flow rate of concrete in the pouring conduit can be avoided from being reduced due to damage to the pouring conduit, thereby improving the pouring effect of concrete; through step S12.2, the verticality and pressure resistance of the pouring conduit can be tested to ensure that the concrete can flow vertically downward to avoid the concrete hitting the pouring conduit, thereby avoiding damage to the pouring conduit, and at the same time, avoiding concrete leakage to improve the pouring effect of concrete; through steps S12.3 and S12.4, there is sufficient pouring space during the initial pouring, thereby ensuring sufficient concrete reserves so that the subsequent pouring conduit can be embedded in the concrete, further improving the pouring effect of concrete.

[0033] In an embodiment of the present invention, Figure 6 and Figure 9 As shown, in step S12.3, the pouring conduit is located in the center between the lock buckles 20 of two adjacent steel casings 10; when lowering the pouring conduit, first place the pouring conduit at the bottom of the hole; then, move the pouring conduit upward by 300 to 400 mm to reserve sufficient pouring space.

[0034] By locating the pouring conduit in the center between the lock buckles 20 of two adjacent steel casings 10, the concrete poured by the pouring conduit can overflow from the middle to the surrounding areas, thereby improving the concrete pouring effect; by placing the pouring conduit at the bottom of the hole first and then moving the pouring conduit upward by 300 to 400 mm, it is ensured that there is sufficient pouring space during the initial pouring, thereby ensuring sufficient concrete reserves so that the subsequent pouring conduit can be embedded in the concrete, further improving the concrete pouring effect.

[0035] In an embodiment of the present invention, Figure 7 and Figure 9 As shown, in step S12.4, fine stone concrete should be used for pouring; the water-cement ratio of the concrete should be 0.5 to 0.55, the slump should be 180 to 220 mm, and the initial setting time should be not less than 6 hours; during the pouring process, the staff should use a measuring rope to measure the rise of the concrete liquid level at multiple times and keep records to prevent the pouring conduit from being blocked; at the same time, the staff should randomly check the slump of the concrete.

[0036] By setting the concrete to fine stone concrete, it can be poured continuously during concrete pouring, and can adapt to the smaller inner diameter of the pouring conduit, thereby improving the user experience of the product; by having the staff measure the rising concrete liquid level multiple times, it is possible to determine whether blockage occurs in the conduit in a timely manner through the rising liquid level, so that the blockage problem in the pouring conduit can be solved as soon as possible, avoiding taking up time for subsequent pouring, and improving the construction efficiency of the product.

[0037] In an embodiment of the present invention, Figure 8 and Figure 9 As shown, in step S12.4, during the pouring of concrete, continuous pouring is adopted; the transportation time of concrete is controlled within 0.5 hours, and the pouring of concrete is ensured to be completed within 0.5 hours after the concrete arrives at the site; the total time of concrete pouring does not exceed the initial setting time of the first concrete pouring.

[0038] By controlling the transportation time of concrete within 0.5 hours and ensuring that the pouring is completed within 0.5 hours after the concrete arrives at the site, it is possible to pour the concrete at the predetermined location in a short time, thereby avoiding the concrete from solidifying before pouring and further improving the effect of concrete pouring.

[0039] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise expressly defined, the orientations or positional relationships indicated by the terms "upper" and "lower" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. The terms "connect," "install," and "fix" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the description of the present invention, the terms "one embodiment," "some embodiments," "specific embodiments," etc., mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0041] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A construction method for steel casing hole cleaning and grouting, characterized in that: The construction method of the steel casing hole cleaning and grouting comprises: S1: Use a vibratory roller to compact the construction area and the equipment's driving range. At the same time, plan the equipment's driving route so that it is at a certain distance from the planned drilling area. S2, positioning multiple predetermined drilling positions by laser positioning; S3, inserting a steel casing with a lock buckle welded on the side wall into the ground using a crawler-type hydraulic driving and pulling mechanism, so that the center of the steel casing coincides with the predetermined drilling position, the lock buckles of two adjacent steel casings are not in the same plane, and there is a gap between the lock buckles of the steel casing and the adjacent steel casings; S4, punching holes at predetermined drilling locations using a crawler-type engineering drilling rig, and cleaning holes at predetermined drilling locations; S5, pouring concrete into the steel casing; S6, marking the driving positions of the steel sheet piles in the construction area, and driving the steel sheet piles into the ground using a crawler-type hydraulic driving and pulling machine, so that two steel sheet piles are respectively fitted with the lock buckles of two adjacent steel casings, and the steel sheet piles close the gap between the lock buckles of the steel casing and the adjacent steel casings; S7, two seamless steel pipes are installed between the lock buckles of two adjacent steel casings; S8, punching and cleaning holes in seamless steel pipes; S9, pouring concrete into the seamless steel pipe; S10, after pouring is completed, the seamless steel pipe is removed before initial setting; S11, 24 hours later, punch and clean the holes between the lock buckles of two adjacent steel casings using a pneumatic down-the-hole hammer; S12, pouring concrete between the lock buckles of two adjacent steel casings; S13, after pouring is completed, the steel sheet piles and steel casings are removed in sequence by a crawler-type hydraulic driving and pulling machine.

2. A construction method for steel casing hole cleaning and grouting according to claim 1, characterized in that: The construction method of the steel casing hole cleaning and grouting also includes: In step S6, the specific steps are as follows: S6.1, within the construction area, draw the pile centerline; S6.2, inspect each steel sheet pile one by one and remove those that are severely corroded or deformed; S6.

3. Clamp the upper end of the steel sheet pile using the vibratory hammer of the crawler-mounted hydraulic driving and pulling machine, ensuring that the center of gravity of the vibratory hammer and the center of gravity of the steel sheet pile are aligned, and that the vibration frequency of the vibratory cone is greater than the natural frequency of the steel sheet pile. S6.4, insert the steel sheet pile vertically into the centerline of the pile using a vibratory hammer; after the steel sheet pile is stable, vibrate the steel sheet pile downwards by using the vibratory hammer; S6.

5. Every time the steel sheet pile sinks 1 to 2 meters, stop vibrating the steel sheet pile and check the verticality of the steel sheet pile to ensure that the verticality of the steel sheet pile is between 88 degrees and 92 degrees; when the verticality of the steel sheet pile is not between 88 degrees and 92 degrees, remove the steel sheet pile and repeat step S6.

4.

3. A construction method for cleaning and pouring steel casing according to claim 2, characterized in that: In step S6.4, during the sinking process of the steel sheet pile, if the sinking speed of the steel sheet pile suddenly decreases, the steel sheet pile stops sinking; after the steel sheet pile is pulled up by 0.6 to 1 m, the steel sheet pile is vibrated and sunk again.

4. A construction method for steel casing hole cleaning and grouting according to claim 1, characterized in that: The construction method of the steel casing hole cleaning and grouting also includes: In step S13, the specific steps are as follows: S13.1, clamp the upper end of the steel sheet pile with the vibratory hammer of the crawler-mounted hydraulic driving and pulling machine, and vibrate the steel sheet pile for 1 to 2 minutes; S13.2, the vibratory hammer of the crawler-type hydraulic driving and pulling machine drives the steel sheet pile to vibrate upward; Among them, in step S13.2, observe the load condition of the crawler hydraulic driving and pulling machine. If it is found that the steel sheet pile is difficult to pull up, stop vibrating the steel sheet pile upward; then, after vibrating the steel sheet pile for 1 to 2 minutes, hammer the steel sheet pile downward by 0.5 to 1 meter, and repeat step S13.

2.

5. A construction method for cleaning and pouring steel casing according to claim 1, characterized in that: The construction method of the steel casing hole cleaning and grouting also includes: In step S12, the specific steps are as follows: S12.

1. Inspect the inner and outer walls of the casting conduit to ensure that the inner wall is smooth and round, and that the inner diameter of the casting conduit is consistent, the joints are tight, and there are no local bumps; S12.

2. Conduct trial assembly and pressure tests on the cast conduit; ensure that the axial deviation of the cast conduit does not exceed 0.5% of the drilling depth and is not greater than 10 cm. During the pressure test of the cast conduit, the test pressure is 0.7 MPa and maintained for 10 minutes. If there is no leakage, the cast conduit is suitable for continued use; if there is leakage, the cast conduit is unusable. S12.

3. Place the casting conduit between the locking buckles of two adjacent steel casings so that the bottom of the casting conduit is 300 to 400 mm from the bottom of the hole; S12.

4. Pour concrete into the conduit to cast the area between the locking clips of two adjacent steel casings. During the pouring process, the conduit should be buried in the concrete to a depth of 4 to 6 m. S12.5, During the final pour, the concrete surface shall be poured to the design elevation; Among them, the inner diameter of the casting conduit is 146mm, and the casting conduit is a threaded conduit.

6. A construction method for cleaning and pouring steel casing according to claim 5, characterized in that: In step S12.3, the pouring conduit is located in the center between the locking buckles of two adjacent steel casings; when lowering the pouring conduit, first place the pouring conduit at the bottom of the hole; then, move the pouring conduit upward by 300 to 400 mm to reserve sufficient pouring space.

7. A construction method for cleaning and pouring steel casing according to claim 6, characterized in that: In step S12.4, the concrete to be poured shall be fine aggregate concrete; the concrete shall have a water-cement ratio of 0.5 to 0.55, a slump of 180 to 220 mm, and an initial setting time of not less than 6 hours; During the pouring process, the staff used a measuring rope to measure the rise of the concrete liquid level multiple times and kept records to prevent blockage of the pouring conduit; at the same time, the staff randomly checked the slump of the concrete.

8. A construction method for cleaning and pouring steel casing according to claim 7, characterized in that: In step S12.4, during the concrete pouring process, continuous pouring is adopted; the transportation time of the concrete is controlled within 0.5 hours, and the pouring of the concrete is ensured to be completed within 0.5 hours after the concrete arrives at the site; the total time of the concrete pouring does not exceed the initial setting time of the first concrete pouring.

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