A construction method for hole cleaning and grouting of a steel casing

Abstract

The application provides a construction method for hole cleaning and pouring of a steel casing, and belongs to the technical field of steel casing pouring. Two steel sheet piles are used to close the spacing between two steel casings, so that subsequent punching and hole cleaning in the area surrounded by the two steel casings and the two steel sheet piles can be performed without collapse. Concrete is poured into the seamless steel pipe to realize the flow of the concrete along the seamless steel pipe to the bottom of the area surrounded by the two steel casings and the two steel sheet piles, thereby achieving the plugging of the bottom of the area by the concrete. Meanwhile, the concrete column formed by pouring in the seamless steel pipe can close the gap between the steel sheet pile and the steel casing, further avoiding the collapse of the hole during the punching process, avoiding the difficulties in hole forming, sticking and burying of the drill, improving the construction efficiency, and ensuring the hole cleaning depth, thereby improving the construction effect of the product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of steel casing pouring, and particularly relates to a construction method for steel casing hole cleaning and pouring. BACKGROUND

[0002] In the related art, in the construction process of a water engineering wharf, the lower part of the construction area is silt powder clay and coral debris mixed coral debris block; since the silt powder clay is in a flow plastic state, and there are pores in the coral debris mixed coral debris block, under the action of seawater flow, the pores collapse coral sand, so that in the hole cleaning process, the collapse easily occurs, which further leads to difficult hole forming, and the conditions of drill jamming and drill burying easily occur, causing slow construction. SUMMARY

[0003] In order to solve the problems of the prior art that in the hole cleaning process, the collapse easily occurs, which further leads to difficult hole forming, and the conditions of drill jamming and drill burying easily occur, causing slow construction, the application provides a construction method for steel casing hole cleaning and pouring, which pours concrete in a seamless steel pipe to realize that the concrete flows along the seamless steel pipe to the bottom of a region surrounded by two steel casings and two steel sheet piles, so as to realize that the concrete blocks the bottom of the region, and the concrete column poured in the seamless steel pipe can close the gap between the steel sheet pile and the steel casing, further avoiding the collapse in the punching process, to avoid the conditions of difficult hole forming, drill jamming and drill burying, to improve the construction efficiency, and to ensure the hole cleaning depth, to improve the construction effect of the product. The specific technical scheme is as follows:

[0004] The application discloses a construction method for steel casing hole cleaning and pouring, and belongs to the field of construction technology.

[0005] In addition, the steel casing hole cleaning and pouring construction method provided by the application can have the following additional technical features.

[0006] In the above technical solution, the steel casing hole cleaning and pouring construction method further comprises the following steps in step S6: S6.1, drawing a pile center line in the construction area; S6.2, detecting the steel sheet piles one by one, and removing the steel sheet piles with serious rust and deformation; S6.3, clamping the upper end of the steel sheet pile by the vibration hammer of the crawler-type hydraulic driving and pulling integrated machine, and making the gravity center of the vibration hammer and the gravity center of the steel sheet pile be on the same straight line, and the vibration frequency of the vibration cone is greater than the self-vibration frequency of the steel sheet pile; S6.4, vertically inserting the steel sheet pile into the pile center line by the vibration hammer; after the steel sheet pile is stable, vibrating and sinking the steel sheet pile by the vibration hammer; S6.5, stopping vibrating and sinking the steel sheet pile every 1-2 m, and checking the perpendicularity of the steel sheet pile to ensure that the perpendicularity of the steel sheet pile is between 88 degrees and 92 degrees; when the perpendicularity of the steel sheet pile is not between 88 degrees and 92 degrees, removing the steel sheet pile and repeating step S6.4.

[0007] In the above technical solution, in step S6.4, during the sinking of the steel sheet pile, if the sinking speed of the steel sheet pile suddenly decreases and the sinking of the steel sheet pile stops, the steel sheet pile is pulled up by 0.6-1 m, and then the steel sheet pile is vibrated and sunk again.

[0008] In the above technical solution, the hole cleaning and pouring construction method of the steel casing further comprises the following specific steps in step S13: S13.1, the upper end of the steel sheet pile is clamped by the vibration hammer of the crawler-type hydraulic driving and pulling integrated machine, and the steel sheet pile is vibrated for 1-2 minutes; S13.2, the vibration hammer of the crawler-type hydraulic driving and pulling integrated machine drives the steel sheet pile to be upwardly vibrated and pulled; in step S13.2, the load condition of the crawler-type hydraulic driving and pulling integrated machine is observed, and if it is found that the steel sheet pile is difficult to be pulled up, the upward vibration and pulling of the steel sheet pile is stopped; then, the steel sheet pile is vibrated for 1-2 minutes, the steel sheet pile is hammered downwardly by 0.5-1 m, and step S13.2 is repeated.

[0009] In the above technical solution, the hole cleaning and pouring construction method of the steel casing further comprises the following specific steps in step S12: S12.1, the inner and outer walls of the pouring guide pipe are detected to ensure that the inner wall of the pouring guide pipe is smooth and round, and the inner diameter of the pouring guide pipe is consistent, the joint is tight, and there is no local concave-convex; S12.2, the pouring guide pipe is subjected to a trial assembly and a trial pressure test; it is ensured that the axis deviation of the pouring guide pipe is not more than 0.5% of the drilling depth and is not more than 10 cm; in the trial pressure test of the pouring guide pipe, the trial pressure is 0.7 MPa, and the pressure is maintained for 10 minutes; if there is no leakage, it is proved that the pouring guide pipe can continue to be used; if there is leakage, it is proved that the pouring guide pipe cannot continue to be used; S12.3, the pouring guide pipe is placed between the locks of two adjacent steel casings, so that the distance between the bottom of the pouring guide pipe and the hole bottom is 300-400 mm; S12.4, concrete is poured into the pouring guide pipe, so that the area between the locks of the two adjacent steel casings is poured; in the pouring process, the pouring guide pipe should be buried in the concrete to a depth of 4-6 m; S12.5, in the last pouring, the concrete surface needs to be poured to the design elevation; wherein the inner diameter of the pouring guide pipe is 146 mm, and the pouring guide pipe is a threaded guide pipe.

[0010] In the above technical solution, in step S12.3, the pouring guide pipe is located at the central position between the locks of the two adjacent steel casings; when the pouring guide pipe is lowered, the pouring guide pipe is first placed on the hole bottom; then, the pouring guide pipe is moved upwardly by 300-400 mm to reserve enough pouring space.

[0011] In the above technical solution, in step S12.4, the poured concrete should use fine stone 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 measures the rising of the concrete liquid surface with a measuring rope multiple times and makes a record to prevent the pouring pipe from being blocked; at the same time, the staff randomly checks the slump of the concrete.

[0012] In the above technical solution, in step S12.4, during the pouring process of the concrete, continuous pouring is adopted; the transportation time of the concrete is controlled within 0.5 hours, and it is ensured that the pouring is completed within 0.5 hours after the concrete arrives at the site; the total time of the concrete pouring is not more than the initial setting time of the first pouring of the concrete.

[0013] Compared with the prior art, the construction method for hole cleaning of a steel casing of the present application has the following beneficial effects:

[0014] 1. By fitting two steel sheet piles with the adjacent two steel casings respectively, the space between the two steel casings is closed, so that when the area surrounded by the two steel casings and the two steel sheet piles is punched and cleaned, the collapse is avoided; compared with the high-pressure water gun punching and the reverse circulation cleaning, not only the design depth is ensured, but also the construction efficiency is improved. By pouring concrete into the seamless steel pipe, the concrete flows along the seamless steel pipe to the bottom of the area surrounded by the two steel casings and the two steel sheet piles, so that the bottom of the area is blocked by the concrete, and the gap between the steel sheet pile and the steel casing is closed by the concrete column poured in the seamless steel pipe, further avoiding the collapse during punching, avoiding the difficulties in hole forming, sticking and burying, improving the construction efficiency, and ensuring the cleaning depth to improve the construction effect of the product.

[0015] 2. By steps S6.1 and S6.2, the accuracy of the steel sheet pile driving position is improved, and the effect of closing the space between the adjacent two steel casings by the steel sheet pile is affected by the quality of the steel sheet pile; by steps S6.3 and S6.4, the steel sheet pile is driven into the predetermined position, compared with the impact driving of the steel sheet pile, the deformation of the steel sheet pile caused by the excessive force is avoided, so that not only the closing effect of the steel sheet pile is ensured, but also the steel sheet pile can be reused, improving the use experience of the product. By step S6.5, the perpendicularity of the steel sheet pile driving is improved, so that the closing effect of the steel sheet pile on the space between the adjacent two steel casings is improved.

[0016] 3. By step S6.4, when the steel sheet pile encounters hard soil, the steel sheet pile can break the hard soil, thereby avoiding the situation that the crawler hydraulic punching and pulling integrated machine is damaged due to excessive load, and ensuring that the steel sheet pile can be successfully punched, thereby improving the use experience of the product.

[0017] 4. By step S13.1, the soil around the steel sheet pile is loosened, thereby reducing the resistance of the soil to the steel sheet pile, and reducing the difficulty of pulling out the steel sheet pile; by observing the load condition of the crawler hydraulic punching and pulling integrated machine, the difficulty of pulling out the steel sheet pile is judged, so as to judge whether hard soil is encountered in the process of pulling out the steel sheet pile. When the steel sheet pile encounters hard soil, the steel sheet pile is vibrated for 1 to 2 minutes, and the steel sheet pile is hammered downward by 0.5 to 1 m, so as to break the hard soil, thereby ensuring that the subsequent steel sheet pile can be successfully pulled out, thereby improving the use experience of the product.

[0018] 5. By step S12.1, the flow rate of the concrete in the pouring guide pipe is reduced due to the damage of the pouring guide pipe, thereby improving the pouring effect of the concrete; by step S12.2, the verticality and pressure resistance of the pouring guide pipe are detected, thereby ensuring that the concrete can flow vertically downward, avoiding the concrete from impacting the pouring guide pipe, thereby avoiding the damage of the pouring guide pipe, and also avoiding the leakage of the concrete, thereby improving the pouring effect of the concrete; by steps S12.3 and S12.4, there is enough pouring space when pouring for the first time, thereby ensuring that there is enough concrete reserve, so that the subsequent pouring guide pipe can be embedded in the concrete, thereby further improving the pouring effect of the concrete.

[0019] 6. By locating the pouring guide pipe at the central position between the locks of the adjacent two steel casings, the concrete poured by the pouring guide pipe is overflowed from the middle to the outside, thereby improving the pouring effect of the concrete; by moving the pouring guide pipe upward by 300 to 400 mm after placing it at the bottom of the hole, enough pouring space is ensured when pouring for the first time, thereby ensuring that there is enough concrete reserve, so that the subsequent pouring guide pipe can be embedded in the concrete, thereby further improving the pouring effect of the concrete.

[0020] 7. By setting the concrete as fine stone concrete, when the concrete is poured, it can be continuously injected and can adapt to the characteristics of the small inner diameter of the pouring guide pipe, thereby improving the use experience of the product; by measuring the rising condition of the liquid surface of the concrete by the staff more frequently, whether the guide pipe is blocked is judged in time through the rising condition of the liquid surface, thereby the blockage problem in the pouring guide pipe can be solved at the first time, the subsequent pouring time is avoided, thereby improving the construction efficiency of the product.

[0021] 8. The concrete is poured at the predetermined position in a short time by controlling the transportation time of the concrete within 0.5 hours and ensuring that the pouring is completed within 0.5 hours after the concrete reaches the site, so that the coagulation of the concrete before pouring is avoided, and the effect of the pouring of the concrete is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Flowchart I of a steel casing hole cleaning and pouring construction method of the present application;

[0023] Figure 2 Flowchart II of a steel casing hole cleaning and pouring construction method of the present application;

[0024] Figure 3 Flowchart III of a steel casing hole cleaning and pouring construction method of the present application;

[0025] Figure 4 Flowchart IV of a steel casing hole cleaning and pouring construction method of the present application;

[0026] Figure 5 Flowchart V of a steel casing hole cleaning and pouring construction method of the present application;

[0027] Figure 6 Flowchart VI of a steel casing hole cleaning and pouring construction method of the present application;

[0028] Figure 7 Flowchart VII of a steel casing hole cleaning and pouring construction method of the present application;

[0029] Figure 8 Flowchart VIII of a steel casing hole cleaning and pouring construction method of the present application;

[0030] Figure 9 Perspective view of a steel casing, a lock, a steel sheet pile and a seamless steel pipe of the present application;

[0031] In the drawings, Figure 9 The correspondence between the reference signs and the component names in the drawings is as follows:

[0032] 10 steel casing, 20 lock, 30 steel sheet pile, 40 seamless steel pipe. DETAILED DESCRIPTION

[0033] The specific implementation cases and the accompanying drawings will be described below. Figures 1 to 9 The present application will be further described, but the present application is not limited to these embodiments.

[0034] A steel casing hole cleaning and pouring construction method, as Figure 1 and Figure 9As shown, the steel casing hole cleaning pouring construction method comprises: S1, the construction area and the equipment driving range are rolled by the vibration roller; at the same time, the equipment driving route is planned, so that the equipment driving route has a certain distance from the predetermined drilling area; S2, the plurality of predetermined drilling positions are positioned by laser positioning; S3, the steel casing 10 with the lock catch 20 welded on the side wall is inserted into the ground by the crawler type hydraulic punching and pulling integrated mechanism, so that the center of the steel casing 10 coincides with the predetermined drilling position, the lock catches 20 of the adjacent two steel casings 10 are not on the same plane, and the lock catch 20 of the steel casing 10 and the adjacent steel casing 10 have a spacing; S4, the punching is carried out on the predetermined drilling position by the crawler type engineering drill, and the hole cleaning is carried out on the predetermined drilling position; S5, the concrete is poured in the steel casing 10; S6, the piling position of the steel sheet pile 30 is marked in the construction area, the steel sheet pile 30 is punched into the ground by the crawler type hydraulic punching and pulling integrated machine, so that the two steel sheet piles 30 respectively fit with the lock catches 20 of the adjacent two steel casings 10, and the steel sheet pile 30 closes the spacing between the lock catch 20 of the steel casing 10 and the adjacent steel casing 10; S7, two seamless steel pipes 40 are punched between the lock catches 20 of the adjacent two steel casings 10; S8, the punching and hole cleaning are carried out in the seamless steel pipe 40; S9, the concrete is poured in the seamless steel pipe 40; S10, after pouring, the seamless steel pipe 40 is pulled out before initial setting; S11, after 24 hours, the punching and hole cleaning are carried out between the lock catches 20 of the adjacent two steel casings 10 by the pneumatic down-the-hole hammer; S12, the concrete is poured between the lock catches 20 of the adjacent two steel casings 10; S13, after pouring, the steel sheet pile 30 is pulled out and the steel casing 10 is pulled out in turn by the crawler type hydraulic punching and pulling integrated machine.

[0035] Through step S1, the firmness of the site soil of the construction area is improved, thereby improving the stability of subsequent construction; at the same time, the equipment driving route is kept a certain distance from the predetermined drilling area to avoid the vibration generated when the equipment is driving 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 steel casing 10 is poured to form a concrete pier column. Through step S6, the position of the steel sheet pile 30 is preliminarily positioned by the lock buckle 20, and 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 close the area between the two adjacent steel casings 10; through steps S7 to S9, the bottom of the area surrounded by the two steel casings 10 and the two steel sheet piles 30 is poured with concrete, so that the concrete blocks the bottom of the area; at the same time, by pouring concrete in the seamless steel pipe 40, a concrete column is formed in the seamless steel pipe 40 to block 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 collection of the steel sheet pile 30 and the steel casing 10 is completed, thereby realizing the reuse of the steel sheet pile 30 and the steel casing 10.

[0036] With the above structure, by fitting two steel sheet piles 30 with the lock buckles 20 of the adjacent two steel casings 10, the two steel sheet piles 30 close the gap between the two steel casings 10, thereby avoiding collapse when punching and cleaning the area surrounded by the two steel casings 10 and the two steel sheet piles 30. Moreover, compared with using a high-pressure water gun to punch and using a reverse circulation method to clean, not only can the designed depth be ensured, but also the construction efficiency can be improved. By pouring concrete in the seamless steel pipe 40, the concrete flows along the seamless steel pipe 40 to the bottom of the area surrounded by the two steel casings 10 and the two steel sheet piles 30, thereby blocking the bottom of the area, and the concrete column formed in the seamless steel pipe 40 can block the gap between the steel sheet pile 30 and the steel casing 10, further avoiding collapse during punching, avoiding hole forming difficulty, sticking and burying, improving construction efficiency, and ensuring the cleaning depth to improve the construction effect of the product.

[0037] Specifically, the lower geology of the construction area is silt clay and coral debris mixed coral debris block. Since the silt clay is in a flowable state, and there are pores in the coral debris mixed coral debris block.

[0038] In the embodiment of the present application, as Figure 2 and Figure 9As shown, the steel casing hole cleaning and pouring construction method further comprises the following specific steps in step S6: S6.1, drawing a pile center line in the construction area; S6.2, detecting each steel sheet pile 30, and removing the steel sheet pile 30 with serious corrosion and deformation; S6.3, clamping the upper end of the steel sheet pile 30 by the vibration hammer of the crawler-type hydraulic punching and pulling integrated machine, and making the center of gravity of the vibration hammer and the center of gravity of the steel sheet pile 30 on the same straight line, and the vibration frequency of the vibration cone is greater than the natural vibration frequency of the steel sheet pile 30; S6.4, vertically inserting the steel sheet pile 30 into the pile center line by the vibration hammer; after the steel sheet pile 30 is stable, the vibration hammer vibrates the steel sheet pile 30; S6.5, stopping the vibration of the steel sheet pile 30 every 1-2 m of sinking, and checking the perpendicularity of the steel sheet pile 30 to ensure that the perpendicularity of the steel sheet pile 30 is between 88 degrees and 92 degrees; when the perpendicularity of the steel sheet pile 30 is not between 88 degrees and 92 degrees, the steel sheet pile 30 is pulled out, and step S6.4 is repeated.

[0039] Through steps S6.1 and S6.2, the accuracy of the steel sheet pile 30 piling position is improved, and the effect of the steel sheet pile 30 on closing the distance between the two adjacent steel casings 10 is avoided. Through steps S6.3 and S6.4, the steel sheet pile 30 is punched into the predetermined position, which can avoid the deformation of the steel sheet pile 30 caused by excessive force, thereby ensuring the closing effect of the steel sheet pile 30 and facilitating the reuse of the steel sheet pile 30, thereby improving the use experience of the product. Through step S6.5, the perpendicularity of the steel sheet pile 30 piling is improved, thereby improving the closing effect of the steel sheet pile 30 on the distance between the two adjacent steel casings 10.

[0040] In the embodiment of the present application, as shown in Figure 3 and Figure 9 In step S6.4, during the sinking of the steel sheet pile 30, if the sinking speed of the steel sheet pile 30 suddenly decreases, the sinking of the steel sheet pile 30 is stopped; after the steel sheet pile 30 is pulled up by 0.6-1 m, the steel sheet pile 30 is vibrated and sunk again.

[0041] Through step S6.4, when the steel sheet pile 30 encounters hard soil, the steel sheet pile 30 can break the hard soil, thereby avoiding the situation that the crawler-type hydraulic punching and pulling integrated machine is damaged due to excessive load, and ensuring that the steel sheet pile 30 can be smoothly punched, thereby improving the use experience of the product.

[0042] In the embodiment of the present application, as shown in Figure 4 and Figure 9As shown in the steel casing hole cleaning construction method further comprises: in step S13, the specific steps are as follows: S13.1, the vibration hammer of the track type hydraulic driving and pulling integrated machine clamps the upper end of the steel sheet pile 30, and the steel sheet pile 30 is vibrated for 1-2 minutes; S13.2, the vibration hammer of the track type hydraulic driving and pulling integrated machine drives the steel sheet pile 30 to vibrate and pull upward; wherein, in step S13.2, the load condition of the track type hydraulic driving and pulling integrated machine is observed, and if it is found that the steel sheet pile 30 is difficult to pull upward, the upward vibration and pulling of the steel sheet pile 30 is stopped; then, after the steel sheet pile 30 is vibrated for 1-2 minutes, the steel sheet pile 30 is hammered downward by 0.5-1 m, and step S13.2 is repeated.

[0043] By step S13.1, the soil around the steel sheet pile 30 is loosened, thereby reducing the resistance of the soil to the steel sheet pile 30, so as to reduce the difficulty of pulling out the steel sheet pile; by observing the load condition of the track type hydraulic driving and pulling integrated machine, the difficulty of pulling up the steel sheet pile 30 is judged, so as to judge whether hard soil is encountered in the process of pulling up the steel sheet pile 30. When the steel sheet pile 30 encounters hard soil, the hard soil is broken by vibrating the steel sheet pile 30 for 1-2 minutes and hammering the steel sheet pile 30 downward by 0.5-1 m, so as to ensure that the subsequent steel sheet pile 30 can be pulled out smoothly, thereby improving the use experience of the product.

[0044] In the embodiment of the present application, as shown in Figure 5 and Figure 9 As shown in the steel casing hole cleaning construction method further comprises: in step S12, the specific steps are as follows: S12.1, the inner and outer walls of the pouring guide pipe are detected to ensure that the inner wall of the pouring guide pipe is smooth and round, and the inner diameter of the pouring guide pipe is consistent, the joint is tight, and there is no local concave-convex; S12.2, the pouring guide pipe is tested for assembly and pressure test; the axis deviation of the pouring guide pipe is ensured to be not more than 0.5% of the drilling depth and not more than 10 cm; during the pressure test of the pouring guide pipe, the test pressure is 0.7 mpa, and the pressure is maintained for 10 minutes; if there is no leakage, it proves that the pouring guide pipe can continue to be used; if there is leakage, it proves that the pouring guide pipe cannot continue to be used; S12.3, the pouring guide pipe is placed between the locks 20 of the adjacent two steel casings 10, so that the distance between the bottom of the pouring guide pipe and the hole bottom is 300-400 mm; S12.4, the concrete is poured into the pouring guide pipe, so as to pour the area between the locks 20 of the adjacent two steel casings 10; during pouring, the pouring guide pipe should be buried in the concrete to a depth of 4-6 m; S12.5, during the last pouring, the concrete surface needs to be poured to the design elevation; wherein, the inner diameter of the pouring guide pipe is 146 mm, and the pouring guide pipe is a threaded guide pipe.

[0045] Through step S12.1, the flow rate of the concrete in the pouring pipe is reduced to avoid damage to the pouring pipe, thereby improving the pouring effect of the concrete; through step S12.2, the verticality and the compression resistance of the pouring pipe are detected to ensure that the concrete flows vertically downward, thereby avoiding the concrete from impacting the pouring pipe, further avoiding damage to the pouring pipe, and also avoiding leakage of the concrete, thereby improving the pouring effect of the concrete; through steps S12.3 and S12.4, there is enough pouring space during initial pouring, thereby ensuring sufficient concrete reserve so that the subsequent pouring pipe can be embedded in the concrete, further improving the pouring effect of the concrete.

[0046] In the embodiments of the present application, as shown in Figure 6 and Figure 9 , in step S12.3, the pouring pipe is located at the central position between the adjacent two steel casings 10; when the pouring pipe is lowered, the pouring pipe is first placed at the bottom of the hole; then, the pouring pipe is moved upward by 300-400 mm to reserve enough pouring space.

[0047] By locating the pouring pipe at the central position between the adjacent two steel casings 10, the concrete poured by the pouring pipe overflows from the middle to the outside, thereby improving the pouring effect of the concrete; by first placing the pouring pipe at the bottom of the hole and then moving the pouring pipe upward by 300-400 mm, it is ensured that there is enough pouring space during initial pouring, thereby ensuring sufficient concrete reserve so that the subsequent pouring pipe can be embedded in the concrete, further improving the pouring effect of the concrete.

[0048] In the embodiments of the present application, as shown in Figure 7 and Figure 9 , in step S12.4, the poured concrete should be fine aggregate concrete; the water-cement ratio of the concrete is 0.5-0.55, the slump is 180-220 mm, and the initial setting time is not less than 6 hours; wherein, during pouring, the staff measures the rising of the concrete liquid surface frequently and records it to prevent the pouring pipe from being blocked; at the same time, the staff randomly checks the slump of the concrete.

[0049] By setting the concrete as fine aggregate concrete, continuous pouring can be realized during pouring of the concrete, and the pouring pipe with a small inner diameter can be adapted, thereby improving the use experience of the product; by having the staff measure the rising of the concrete liquid surface frequently, whether the pipe is blocked can be determined in time according to the rising of the liquid surface, thereby the blockage problem in the pouring pipe can be solved at the first time, the time for subsequent pouring is avoided, and the construction efficiency of the product is improved.

[0050] In the embodiments of the present application, as shown in Figure 8 and Figure 9 In step S12.4, during the pouring of the concrete, continuous pouring is adopted; the transportation time of the concrete is controlled within 0.5 hours, and it is ensured that the pouring is completed within 0.5 hours after the concrete arrives at the site; and the total time of the pouring of the concrete does not exceed the initial setting time of the first pouring of the concrete.

[0051] By controlling the transportation time of the concrete within 0.5 hours and ensuring that the pouring is completed within 0.5 hours after the concrete arrives at the site, the concrete is poured at the predetermined position within a short time, so that the setting of the concrete before pouring is avoided, and the effect of the pouring of the concrete is further improved.

[0052] In the description of the present application, the term “a plurality of” refers to two or more, unless otherwise explicitly limited, and the terms “upper”, “lower”, and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application; the terms “connection”, “installation”, “fixation” and the like should be understood broadly, for example, “connection” can be fixed connection, or detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] In the description of the present application, the terms “one embodiment”, “some embodiments”, “a specific embodiment” and the like described in the description of the embodiments or examples mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for steel casing hole cleaning and grouting, characterized in that, The steel casing hole cleaning and pouring construction method comprises the following steps: S1, compacting the construction area and the equipment driving range by a vibrating roller; meanwhile, planning the equipment driving route so that the equipment driving route is a certain distance away from the predetermined drilling area; S2, positioning the plurality of predetermined drilling positions by laser positioning; S3, inserting the steel casing with a lock catch welded on the side wall into the ground by a tracked hydraulic punching and pulling integrated mechanism, so that the center of the steel casing coincides with the predetermined drilling position, the lock catches of adjacent two steel casings are not on the same plane, and the lock catch of the steel casing and the adjacent steel casing have a spacing; S4, punching at the predetermined drilling position by a tracked engineering drill, and cleaning the hole at the predetermined drilling position; S5, pouring concrete into the steel casing; S6, marking the piling position of the steel sheet pile in the construction area, and driving the steel sheet pile into the ground by the tracked hydraulic punching and pulling integrated machine, so that two steel sheet piles respectively fit with the lock catches of adjacent two steel casings, and the steel sheet pile closes the spacing between the lock catch of the steel casing and the adjacent steel casing; S7, driving two seamless steel pipes between the lock catches of adjacent two steel casings; S8, punching and cleaning the hole in the seamless steel pipe; S9, pouring concrete into the seamless steel pipe; S10, after pouring is completed, pulling out the seamless steel pipe before initial setting; S11, after 24 hours, punching and cleaning the hole between the lock catches of adjacent two steel casings by a pneumatic down-the-hole hammer; S12, pouring concrete between the lock catches of adjacent two steel casings; S13, after pouring is completed, sequentially pulling out the steel sheet pile and the steel casing by the tracked hydraulic punching and pulling integrated machine.

2. The construction method of hole cleaning and grouting of a steel casing according to claim 1, characterized in that, The steel casing hole cleaning and pouring construction method further comprises: In step S6, the specific steps are as follows: S6.1, drawing a pile center line in the construction area; S6.2, detecting the steel sheet pile root by root, and removing the steel sheet pile with serious rust and deformation; S6.3, clamping the upper end of the steel sheet pile by the vibrating hammer of the tracked hydraulic punching and pulling integrated 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 vibrating frequency of the vibrating cone is greater than the natural frequency of the steel sheet pile; S6.4, vertically inserting the steel sheet pile into the pile center line by the vibrating hammer; after the steel sheet pile is stable, vibrating the steel sheet pile by the vibrating hammer; S6.5, stopping vibrating the steel sheet pile every time the steel sheet pile sinks 1 to 2 m, and checking the perpendicularity of the steel sheet pile to ensure that the perpendicularity of the steel sheet pile is between 88 degrees and 92 degrees; when the perpendicularity of the steel sheet pile is not between 88 degrees and 92 degrees, the steel sheet pile is pulled out, and step S6.4 is repeated.

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

4. The construction method of hole cleaning and grouting of a steel casing according to claim 1, characterized in that, The steel casing hole cleaning and pouring construction method further comprises: In step S13, the specific steps are as follows: S13.1, clamping the upper end of the steel sheet pile by the vibrating hammer of the tracked hydraulic punching and pulling integrated machine, and vibrating the steel sheet pile for 1 to 2 minutes; S13.2, the caterpillar hydraulic driving and pulling integrated machine drives the steel sheet pile upward by the vibration hammer; In step S13.2, the load of the caterpillar hydraulic driving and pulling integrated machine is observed, and if it is found that the steel sheet pile is difficult to pull upward, the upward vibration pulling of the steel sheet pile is stopped; then, the steel sheet pile is vibrated for 1-2 minutes, and the steel sheet pile is hammered downward by 0.5-1 m, and step S13.2 is repeated.

5. The construction method of hole cleaning and grouting of a steel casing according to claim 1, characterized in that, The construction method of the steel casing hole cleaning and pouring further comprises: In step S12, the specific steps are as follows: S12.1, the inner and outer walls of the pouring guide pipe are detected to ensure that the inner wall of the pouring guide pipe is smooth and round, and the inner diameter of the pouring guide pipe is consistent, the joint is tight, and there is no local concave-convex; S12.2, the pouring guide pipe is tested and tested to ensure that the axis deviation of the pouring guide pipe is not more than 0.5% of the drilling depth and not more than 10 cm; during the pressure test of the pouring guide pipe, the test pressure is 0.7mpa, and the pressure is maintained for 10 minutes; if there is no leakage, it proves that the pouring guide pipe can continue to be used; if there is leakage, it proves that the pouring guide pipe cannot continue to be used; S12.3, the pouring guide pipe is placed between the locks of the two adjacent steel casings, and the distance between the bottom of the pouring guide pipe and the hole bottom is 300-400mm; S12.4, the concrete is poured into the pouring guide pipe, so as to pour the area between the locks of the two adjacent steel casings; during pouring, the pouring guide pipe should be buried in the concrete to a depth of 4-6m; S12.5, during the last pouring, the concrete surface needs to be poured to the design elevation; In the pouring guide pipe, the inner diameter of the pouring guide pipe is 146mm, and the pouring guide pipe is a threaded guide pipe.

6. The construction method of the steel casing hole cleaning and pouring according to claim 5, wherein: In step S12.3, the pouring guide pipe is located at the central position between the locks of the two adjacent steel casings; when the pouring guide pipe is lowered, the pouring guide pipe is first placed at the hole bottom; then, the pouring guide pipe is moved upward by 300-400mm to reserve enough pouring space.

7. The construction method of the steel casing hole cleaning and pouring according to claim 6, wherein: In step S12.4, the poured concrete should use fine stone concrete; the water-cement ratio of the concrete is 0.5-0.55, the slump is 180-220mm, and the initial setting time is not less than 6 hours; In the pouring process, the staff measures the rising of the concrete liquid surface with a measuring rope at multiple frequencies and records it, to prevent the pouring guide pipe from being blocked; at the same time, the staff randomly checks the slump of the concrete.

8. The construction method of the steel casing hole cleaning and pouring according to claim 7, wherein: In step S12.4, during the pouring of the concrete, continuous pouring is adopted; the transportation time of the 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 the concrete pouring is not more than the initial setting time of the first concrete pouring.

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