Warp shrinkage processing structure in submerged hole forming process of steel pipe pile engineering

Abstract

The utility model belongs to the technical field of steel pipe pile engineering submerged hole-forming construction, and particularly relates to a reducing processing structure in the steel pipe pile engineering submerged hole-forming process, which comprises a spiral drill rod and blades, the circumference of the spiral drill rod is uniformly provided with a plurality of blades, and the blades are arranged along the length direction of the spiral drill rod; the two ends of the spiral drill rod are detachably connected with the drill rod or the down-the-hole hammer respectively. By means of the hole shrinkage processing structure, the hole shrinkage phenomenon can be avoided in the hole forming process under the conditions that an upper soil layer is soft, the thickness of the soil layer is large or landslide deformation is fast. The structure is convenient and fast to construct and convenient to manufacture, the hole forming quality meets the requirement, and the problem that in the steel pipe pile construction process, hole shrinkage occurs in the down-the-hole hammer drilling hole forming process is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel pipe pile engineering submerged hole construction, in particular to a shrinkage treatment structure in the process of steel pipe pile engineering submerged hole construction. Background Art

[0002] As an engineering measure for controlling landslide geological disasters, steel pipe piles have the advantages of simple pile construction, short construction period and relatively small investment, and are particularly suitable for geological disaster emergency rescue projects.

[0003] At present, the main drilling processes for steel pipe piles include rotary coring drill drilling and down-the-hole hammer drilling (hereinafter referred to as down-the-hole drilling) processes. The down-the-hole hammer drilling process has the characteristics of high efficiency, good hole quality, and low pollution in dry operations. However, when the upper soil layer is soft, the soil layer is thick, or the landslide deformation is fast, shrinkage is very likely to occur during the drilling process. Therefore, people have always hoped to establish a shrinking treatment structure that is convenient to construct, easy to make, and has satisfactory hole quality, so as to solve the problem of shrinkage encountered in the down-the-hole hammer drilling process during steel pipe pile construction. Utility Model Content

[0004] In view of the technical problems existing in the background technology, the utility model provides a diameter shrinkage processing structure in the process of submerged drilling of steel pipe pile engineering, providing a convenient, efficient and reliable structural device for solving the diameter shrinkage problem in submerged drilling construction of steel pipe pile engineering.

[0005] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0006] A shrinkage treatment structure for a steel pipe pile engineering submerged hole forming process comprises a spiral drill rod and blades. The spiral drill rod is evenly distributed with a plurality of blades on its circumference and the blades are arranged along the length direction of the spiral drill rod. Both ends of the spiral drill rod are detachably connected to a drill rod or a submerged hole hammer.

[0007] Optionally, the shrinkage treatment structure in the submerged drilling process of the steel pipe pile engineering further includes a fixed block, and two adjacent blades are connected by a plurality of fixed blocks, and the plurality of fixed blocks are arranged at a fixed distance along the length direction of the spiral drill rod.

[0008] Optionally, the fixing block is configured to be in an arc shape and is made of an arc-shaped steel coil.

[0009] Optionally, the spiral drill rod has threads at both ends, and can be connected to a drill rod or a down-the-hole hammer.

[0010] Optionally, the diameter of the pile hole drilled by the down-the-hole hammer is greater than or equal to the outer diameter of the shrinkage treatment structure.

[0011] Optionally, the blades are welded to the auger rod to form a whole and form a reduced diameter structure.

[0012] Optionally, the blades are welded and fixed to the circumference of the sleeve, and the sleeve is slidably disposed on the auger rod and connected and fixed by welding.

[0013] Optionally, the blades are welded and fixed to the circumference of the sleeve, and the sleeve is slidably set on the auger rod and connected and fixed by a bolt assembly; the bolt assembly includes a bolt and a nut, one end of the bolt passes through the sleeve and is threadedly connected to the internal threaded hole of the auger rod, and the other end of the bolt passes through the fixing plate and is locked by a number of nuts.

[0014] Optionally, the blade ends at both ends of the auger rod are provided with inclined surfaces.

[0015] The utility model has the following advantages and beneficial effects:

[0016] In the utility model, the diameter reduction processing structure includes a spiral drill rod and blades. The spiral drill rod has two ends for connecting the surface equipment of the down-the-hole hammer and the drill bit equipment or the extension connecting rod device at the bottom of the pile hole. The rotation radius of the steel plate blade is slightly smaller than the radius of the steel pipe pile hole. When passing through a stratum that is easy to reduce the diameter, the ordinary drill rod is replaced with the diameter reduction processing structure in the process of down-the-hole hammer drilling of the steel pipe pile engineering of the invention. After the replacement, the drilling equipment is lowered again. When the diameter reduction processing structure reaches the diameter reduction area, it starts to rotate, and the friction between the blades and the rock formation is used to break the rock. The broken rock debris falls into the bottom of the pile hole. After the spiral drill rod passes through the diameter reduction area and reaches the normal rock formation, the rock particles that fall to the bottom after being broken are discharged by compressed air, and then the down-the-hole hammer drilling is continued until the hole is completed.

[0017] The shrinkage treatment structure can avoid shrinkage during the hole-making process when the upper soil layer is soft, the soil layer is thick, or the landslide deformation is fast. This structure is convenient to construct, easy to make, and the hole-making quality meets the requirements. It solves the problem of shrinkage during the down-the-hole hammer drilling process in steel pipe pile construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the diameter reduction processing structure in the process of drilling with a down-the-hole hammer in a pipe pile engineering of the utility model;

[0019] Figure 2 for Figure 1 A top view of

[0020] Figure 3 The utility model is a structure of a diameter reduction treatment structure in the process of drilling a hole with a down-the-hole hammer in a steel pipe pile project. Figure 1 ;

[0021] Figure 4 The utility model is a structure of a diameter reduction treatment structure in the process of drilling a hole with a down-the-hole hammer in a steel pipe pile project. Figure 2 ;

[0022] Figure 5 It is a cross-sectional schematic diagram of the diameter reduction processing structure in the process of drilling with a down-the-hole hammer in a steel pipe pile engineering of the utility model;

[0023] Figure 6 It is a schematic diagram of the outer diameter reduction treatment in the process of drilling with a down-the-hole hammer in a steel pipe pile engineering of the utility model;

[0024] Icons: 1-reduction treatment structure, 11-auger rod, 12-blade, 121-inclined surface, 13-fixed block, 14-sleeve, 15-bolt, 16-nut, 2-down-the-hole hammer, 21-drill bit, 22-down-the-hole hammer joint, 3-reduction area, 4-normal rock formation, 41-pile hole. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1 , Figure 2 As shown, a diameter reduction treatment structure in the process of submerged drilling of steel pipe pile engineering includes a spiral drill rod 11 and blades 12. A plurality of blades 12 are evenly distributed on the circumference of the spiral drill rod 11. The blades 12 are arranged along the length direction of the spiral drill rod 11. The blades 12 are connected to the spiral drill rod 11 to form a whole and form a diameter reduction treatment structure 1. Both ends of the spiral drill rod 11 are detachably connected to a common drill rod or a down-the-hole hammer 2.

[0028] like Figure 1 , Figure 2 As shown, further, the shrinkage processing structure 1 of the utility model also includes a fixing block 13, and two adjacent blades 12 are connected by a plurality of fixing blocks 13, and the plurality of fixing blocks 13 are arranged at a fixed distance along the length direction of the auger rod 11.

[0029] like Figure 1 , Figure 2As shown, further, the fixing block 13 is configured to be in an arc shape and is made of an arc-shaped steel coil. The fixing block 13 is welded and fixed on the blade 12 .

[0030] like Figure 1 As shown, the ends of the blades 12 at both ends of the auger rod 11 are provided with inclined surfaces 121 .

[0031] As a preferred embodiment of the present invention, both ends of the spiral drill rod 11 are provided with threads, and can be connected to a common drill rod or a down-the-hole hammer 2 by means of threads.

[0032] Reference Figure 1 , Figure 5 , Figure 6 In the present invention, the diameter of the pile hole 41 drilled by the down-the-hole hammer 2 is greater than or equal to the outer diameter of the shrinking treatment structure. Preferably, the diameter of the pile hole 41 drilled by the down-the-hole hammer 2 is slightly greater than the outer diameter of the shrinking treatment structure to prevent the blade 12 from being deformed by hard impact.

[0033] like Figure 2 As shown, the blades 12 are directly welded and fixed to the outer wall of the auger rod 11.

[0034] like Figure 3 As shown, the blades 12 are welded and fixed on the circumference of the sleeve 14, and the sleeve 14 is slidably arranged on the auger rod 11 and connected and fixed by welding.

[0035] like Figure 3 As shown, the blades 12 are welded and fixed on the circumference of the sleeve 14, and the sleeve 14 is slidably arranged on the auger rod 11, and the sleeve 14 and the auger rod 11 are detachably connected, for example, by threaded connection.

[0036] like Figure 4 As shown, the blade 12 is welded and fixed on the circumference of the sleeve 14, and the sleeve 14 is slidably set on the auger rod 11 and connected and fixed by a bolt assembly. The bolt assembly includes a bolt 15 and a nut 16. One end of the bolt 15 passes through the inner hole of the sleeve 14 and is threadedly connected to the internal threaded hole of the auger rod 11. The nut 16 is passed through the bolt 15 on the outer wall of the sleeve 14. The other end of the bolt 15 passes through the fixed block 13 and is locked and fixedly connected to the fixed block 13 by two nuts 16. This connection method can fix the sleeve 14 and the blade 12 on the auger rod 11 while reinforcing the fixed block 13 to avoid deformation of the fixed block 13 and ensure the connection strength of the blade 12.

[0037] Drilling principle:

[0038] like Figure 1As shown, the diameter reduction processing structure 1 has a spiral drill rod 11, which can be connected to an ordinary drill rod or a down-the-hole hammer 2. When passing through a formation that is easy to reduce the diameter, the ordinary drill rod can be replaced with the diameter reduction processing structure 1.

[0039] like Figure 5 As shown, the normal operation of the down-the-hole hammer 2 for drilling a hole in a steel pipe pile project is to use a rotary drill as a pile frame, and adopt a long spiral drill rod 11 to work with a pneumatic down-the-hole hammer 2. The down-the-hole hammer 2 uses the high-pressure air input by an external air compressor to drive the internal piston to perform high-frequency reciprocating motion, and transfers the kinetic energy generated by the motion to the drill bit 21, so that the drill bit 21 obtains a certain impact work and then performs impact crushing on the rock at the bottom of the hole. At the same time, the rotary drill drives the long spiral drill rod 11, the down-the-hole hammer 2 and the drill bit 21 to perform appropriate drilling pressure and rotary drilling. The rock is volume crushed under the combined action of the impact work and the drilling pressure, and then the air in the down-the-hole hammer 2 blows the crushed rock cuttings away from the bottom of the hole and discharges them out of the hole mouth.

[0040] If the hole is reduced in diameter during the drilling process, the auger 11 and the down-the-hole hammer 2 drilling equipment should be lifted to observe the situation in the hole, determine the range of the reduced diameter area 3, and replace the ordinary drill rod in the reduced diameter area 3 with a reduced diameter processing structure 1 composed of the auger 11 and the blades 12. The replaced reduced diameter processing structure 1 ensures the tightness of the connection with the upper and lower drill rods or the down-the-hole hammer joint 22. After the replacement, the drilling equipment is lowered again. When the reduced diameter processing structure 1 reaches the reduced diameter area 3, it starts to rotate, and the friction between the blades 12 and the rock formation is used to break the rock. The broken rock fragments fall into the bottom of the pile hole 41. When drilling, drill slowly first, and then drill at full speed after it returns to normal. Pay attention to the sinking speed of the drill rod. If there is any abnormality, stop rotating and check. After the auger 11 passes through the reduced diameter area 3 and reaches the normal rock formation 4, use compressed air to expel the rock particles that fall to the bottom after being broken, and then continue drilling with the down-the-hole hammer 2 until the hole is completed.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A shrinkage treatment structure in the process of submerged drilling of steel pipe pile engineering, characterized in that : It comprises an auger rod and blades, wherein a plurality of blades are evenly distributed on the circumference of the auger rod, and the blades are arranged along the length direction of the auger rod; the two ends of the auger rod are detachably connected to the drill rod or the down-the-hole hammer; It also includes a fixing block, two adjacent blades are connected by a plurality of fixing blocks, and the plurality of fixing blocks are arranged at a fixed distance along the length direction of the auger rod; The blades are welded and fixed on the circumference of the sleeve, and the sleeve is slidably arranged on the auger rod and connected and fixed by welding.

2. The shrinkage treatment structure in the submerged hole forming process of the steel pipe pile engineering according to claim 1 is characterized in that: The fixing block is arranged in an arc shape and is made of an arc-shaped steel coil.

3. The shrinkage treatment structure in the submerged hole forming process of the steel pipe pile engineering according to claim 1 is characterized in that: The spiral drill rod has threads at both ends, and can be connected to a drill rod or a down-the-hole hammer.

4. The shrinkage treatment structure in the submerged hole forming process of steel pipe pile engineering according to claim 1, characterized in that: The diameter of the pile hole drilled by the down-the-hole hammer is greater than or equal to the outer diameter of the shrinkage treatment structure.

5. The shrinkage treatment structure in the submerged hole forming process of steel pipe pile engineering according to claim 1 is characterized in that: The blade ends at both ends of the auger rod are provided with inclined surfaces.

6. A shrinkage treatment structure in the process of submerged drilling of steel pipe pile engineering, characterized in that: It comprises an auger rod and blades, wherein a plurality of blades are evenly distributed on the circumference of the auger rod, and the blades are arranged along the length direction of the auger rod; both ends of the auger rod are detachably connected to a drill rod or a down-the-hole hammer; It also includes a fixing block, two adjacent blades are connected by a plurality of fixing blocks, and the plurality of fixing blocks are arranged at a fixed distance along the length direction of the auger rod; The blades are welded and fixed on the circumference of the sleeve, and the sleeve is slidably arranged on the auger rod and is connected and fixed by a bolt assembly; the bolt assembly includes a bolt and a nut, one end of the bolt passes through the sleeve and is threadedly connected to the internal threaded hole of the auger rod, and the other end of the bolt passes through a fixing plate and is locked by a plurality of nuts.

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