CN111206567A - Construction method of steel pipe pile in combined pile based on PC construction method - Google Patents
Construction method of steel pipe pile in combined pile based on PC construction method Download PDFInfo
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- CN111206567A CN111206567A CN202010063809.4A CN202010063809A CN111206567A CN 111206567 A CN111206567 A CN 111206567A CN 202010063809 A CN202010063809 A CN 202010063809A CN 111206567 A CN111206567 A CN 111206567A
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- steel pipe
- pile
- pipe pile
- movable
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
Abstract
The invention discloses a construction method of a steel pipe pile in a combined pile in a PC construction method, which solves the problem of material waste of the steel pipe pile at the present stage. The technical scheme is that the construction method of the steel pipe pile in the combined pile based on the PC construction method comprises the following steps: s1, mounting a limiting device on the front pile; the limiting device is provided with a first limiting hole for limiting the horizontal displacement of the front pile and a second limiting hole for limiting the horizontal displacement of the movable steel pipe pile to be installed; the front pile is provided with a fixed lock catch part; the movable steel pipe pile sequentially comprises a locking section and an extension section from top to bottom, and two movable locking parts which are bilaterally symmetrical relative to the movable steel pipe pile are arranged on the outer side wall of the locking section of the movable steel pipe pile; s2, inserting the bottom end of the movable steel pipe pile into a second limiting hole by using a pile driver; s3, pressing the movable steel pipe pile downwards by using a pile driver to enable the movable locking part of the movable steel pipe pile to be buckled with the fixed locking part of the front pile; s4, driving the movable steel pipe pile to a designed elevation by using a pile driver, and solving the problem of waste of the steel pipe pile.
Description
Technical Field
The invention relates to the field of building construction, in particular to a construction method of a steel pipe pile in a combined pile under a PC construction method.
Background
The combined pile of the PC construction method has the advantages of high strength, light material, reliable quality, good water stopping effect, convenient construction, repeatable construction and good economy, and is valued and favored by the foundation pit industry. The combined pile of the PC construction method is usually formed by combining a steel pipe pile and a Larsen steel plate pile, and comprises a steel pipe pile and Larsen steel plate pile matched structure and a steel pipe pile and steel pipe pile matched structure.
Referring to fig. 1, the steel pipe pile includes a main steel pipe 26 and two locking strips 24 symmetrically disposed on the outer side wall of the main steel pipe 26. The two locking strips 24 are circumferentially spaced by 180 degrees and are parallel to the axis of the steel pipe pile. The locking strip 24 has a first locking portion 241, and the length of the locking strip 24 is identical to that of the main steel duct 26.
Referring to fig. 2, a larsen steel sheet pile 1, the larsen steel sheet pile 1 has a C-shaped cross section, and includes a web 11 and two side plates 12. The two side plates 12 are provided with second locking portions 121 on the sides far away from the web 11.
Referring to fig. 3 and 4, in the construction of the composite pile according to the PC construction method, two construction conditions exist in which the steel pipe pile and the front pile are assembled. The first condition is that the front pile is the Larsen steel sheet pile 1 which is already fixed on the ground, and after the steel pipe pile is installed, the first locking part 241 of the steel pipe pile is buckled with the second locking part 121 of the Larsen steel sheet pile 1; in the second situation, the front pile is a steel pipe pile already fixed to the ground, and when the following steel pipe pile is installed, the first locking parts 241 of the two steel pipe piles are engaged with each other.
Because the different foundation ditch is different to the demand of the design length of steel-pipe pile, in order to satisfy the construction requirement of steel-pipe pile, constructor can cut or weld the steel-pipe pile. However, in the welding process, the locking strips of the upper and lower steel pipe piles to be welded are difficult to align, and the first locking parts 241 of the two steel pipe piles to be welded are also difficult to align, so that the steel pipe pile obtained after welding is difficult to smoothly slide and insert along the second locking part 241 of the larsen steel sheet pile 1 fixed on the ground/the first locking part 241 of the steel pipe pile.
In order to solve the above problems, it is common to cut a long steel pipe pile and discard a short steel pipe pile, which wastes the material of the steel pipe pile.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method of a steel pipe pile in a combined pile in a PC construction method, and solves the problem of waste of the steel pipe pile.
The above object of the present invention is achieved by the following technical solutions:
a construction method of a steel pipe pile in a combined pile of a PC construction method comprises the following steps: s1, mounting a limiting device on the front pile; the limiting device is provided with a first limiting hole for limiting the horizontal displacement of the front pile and a second limiting hole for limiting the horizontal displacement of the movable steel pipe pile to be installed; the front pile is provided with a fixed lock catch part; the movable steel pipe pile sequentially comprises a locking section and an extension section from top to bottom, two lock catch strips which are symmetrical left and right relative to the movable steel pipe pile are arranged on the outer side wall of the locking section of the movable steel pipe pile, the two lock catch strips are circumferentially spaced by 180 degrees and are parallel to the axis of the movable steel pipe pile, and each lock catch strip is provided with a movable lock catch part matched with the fixed lock catch part of the front pile; s2, after the movable steel pipe pile is hoisted by using a pile driver, adjusting the circumferential angle of the movable steel pipe pile to enable the movable lock catch part of the movable steel pipe pile to be opposite to the fixed lock catch part of the front pile, gradually lowering the movable steel pipe pile to enable the bottom end of the movable steel pipe pile to be inserted into the second limiting hole; s3, when the bottom of the movable steel pipe pile is abutted to the ground, a pile driver is used for pressing the movable steel pipe pile downwards, so that the movable locking part of the movable steel pipe pile is buckled with the fixed locking part of the front pile; and S4, driving the movable steel pipe pile to a designed elevation by using a pile driver.
Through adopting above-mentioned technical scheme, the structure of above-mentioned activity steel-pipe pile is injectd, make need not consider the problem of treating whether the hasp strip of two steel-pipe piles of welded aligns to activity steel-pipe pile welded in-process, make constructor can increase the length of activity steel-pipe pile at the bottom welding steel ring of activity steel-pipe pile according to the demand of foundation ditch, thereby also can cut the extension section of activity steel-pipe pile and reduce the length of activity steel-pipe pile, make activity steel-pipe pile can carry out used repeatedly, help reducing the waste of activity steel-pipe pile.
Meanwhile, in the construction method of the steel pipe pile in the combined pile of the PC construction method, the limiting device is installed in S1, the horizontal displacement of the limiting device is avoided through the matching of the front pile and the first limiting hole, and meanwhile, the horizontal direction of the movable steel pipe pile is limited through the matching of the second limiting hole and the movable steel pipe pile, so that the movable steel pipe pile is kept in a vertical state in the pressing-down process, and the movable locking part on the movable steel pipe pile and the fixed locking part of the front pile are buckled.
The invention is further provided that at least three movable limiting planes matched with the outer side wall of the movable steel pipe pile are arranged at the second limiting hole of the movable steel pipe pile.
Through adopting above-mentioned technical scheme, because the activity steel-pipe pile can take place the small range of horizontal direction to leap in the spacing downthehole second and move, because the spacing hole of second is through the spacing plane of at least three activity to inject the leap in the horizontal direction of activity steel-pipe pile and move, make the butt of activity steel-pipe pile and the spacing downthehole wall of second be line contact for the wearing and tearing volume of the spacing downthehole wall of second of activity steel-pipe pile and stop device is less.
The invention is further arranged in that the front pile is a Larsen steel plate pile, and the limiting device is provided with a first plane attached to a web plate of the Larsen steel plate pile, two second planes respectively attached to two side plates of the Larsen steel plate pile and a third plane for two fixing lock catch parts of the Larsen steel plate pile to simultaneously abut against in the first limiting hole.
By adopting the technical scheme, the first plane, the two second planes and the third plane are adopted, so that the guiding device is sleeved on the Larsen steel plate pile and is not easy to move in the horizontal direction, and the installation and the positioning of the limiting device on the Larsen steel plate pile are facilitated.
The invention is further provided that the front pile is a fixed steel pipe pile, and the first limiting hole is a round hole matched with the fixed steel pipe pile.
Through adopting above-mentioned technical scheme, first spacing hole be with fixed steel-pipe pile complex round hole for stop device is through fixed steel-pipe pile and first spacing hole cooperation back, and stop device is difficult for taking place leap up in the horizontal direction and moves.
The present invention further provides that the S3 further includes the following steps: and when the bottom end of the movable locking part is 2 meters away from the top surface of the limiting device, stopping pressing the movable steel pipe pile, mounting a guide device on the limiting device, wherein the guide device is provided with a third limiting hole for the movable steel pipe pile to pass through, the guide device is also provided with a guide through groove for the movable locking part of the movable steel pipe pile to pass through, the width of the guide through groove is gradually reduced, and the lower end opening of the guide through groove is just opposite to the fixed locking part of the front pile.
By adopting the above technical scheme, after the pile driver lifts the movable steel pipe pile in S2, a small circumferential angle deviation occurs in the process of facing the movable locking part of the movable steel pipe pile and the fixed locking part of the front pile. Now through setting up guider for the in-process that activity steel-pipe pile was pushed down by the pile driver, the bottom of activity hasp portion can the butt on the lateral wall that leads to the groove to the final lower extreme opening from leading to the groove under the butt direction of the lateral wall that leads to the groove, and with the cooperation of the fixed hasp portion that leads to under the groove. The guide device is beneficial to the alignment and locking of the movable locking part and the fixed locking part, so that the construction efficiency of the steel pipe pile construction in the combined pile of the PC construction method is improved.
The invention is further provided that a positioning section is further arranged between the extension section and the locking section of the movable steel pipe pile, the outer diameters of the movable steel pipe pile in the extension section and the locking section are consistent, and the outer diameter of the movable steel pipe pile in the positioning section is larger than the outer diameters of the extension section and the locking section; the third limiting hole sequentially comprises a guide hole and a positioning hole from top to bottom, and the aperture of the positioning hole is larger than the outer diameter of the movable steel pipe pile at the extension section; the aperture of the positioning hole is larger than the outer diameter of the movable steel pipe pile at the locking section; the aperture of the positioning hole is consistent with the outer diameter of the movable steel pipe pile at the positioning section.
Through adopting above-mentioned technical scheme, the setting of location section helps improving the movable steel-pipe pile and pushes down positioning accuracy in-process in the activity steel-pipe pile, and the principle is as follows: the extension section of the movable steel pipe pile firstly enters the third limiting hole, and the positioning accuracy of the movable steel pipe pile on the horizontal plane is not ideal as the aperture of the third limiting hole is larger than the outer diameter of the movable steel pipe pile in the extension section; along with the activity steel-pipe pile is pushed down, the locating section of activity steel-pipe pile enters into the spacing hole of third to under the guiding action of guiding hole, in the locating section can enter into the locating hole smoothly, because the external diameter of locating section is the same with the aperture of locating hole, has promoted the positioning accuracy of activity steel-pipe pile on the horizontal plane.
The present invention further provides that the S3 further includes the following steps: and when the distance from the bottom end of the positioning section to the top end of the guide device is 0.3 m, coating a layer of lubricating grease on the outer surface of the movable steel pipe pile at the positioning section.
By adopting the technical scheme, before the positioning section enters the guide device, the outer surface of the positioning section is coated with a layer of lubricating grease, so that the abrasion between the positioning section of the movable steel pipe pile and the positioning hole of the guide device is reduced, and the service lives of the movable steel pipe pile and the guide device are prolonged.
The invention is further arranged in that the guide device comprises a left mounting part and a right mounting part, the third limiting hole comprises a limiting left hole groove arranged on the left mounting part and a limiting right hole groove arranged on the right mounting part, and the two guide through grooves are respectively arranged in the middle parts of the limiting left hole groove and the limiting right hole groove.
Through adopting above-mentioned technical scheme, guider comprises left installation department and right installation department, after the locking of the activity hasp portion of activity steel-pipe pile and the fixed hasp portion of preceding stake, can dismantle guider from the outside of activity steel-pipe pile.
The invention is further arranged in that the left mounting part and the right mounting part are both provided with at least two mounting through holes penetrating through the upper end surface and the lower end surface of the left mounting part and the right mounting part, the guide device is provided with a mounting column which penetrates through the mounting through holes and is matched with the mounting through holes, the top end of the mounting column is provided with a second mounting stud, and the second mounting stud is provided with a mounting nut which is used for pressing the left mounting part/the right mounting part on the limiting device.
Through adopting above-mentioned technical scheme, left side installation department and right installation department pass through erection column, installation double-screw bolt, mounting nut to be fixed at guider's top, and this kind of mounting means positioning accuracy is higher to help the mutual lock of activity hasp portion and fixed hasp portion.
In summary, the invention includes at least one of the following beneficial technical effects:
1. a construction method of a steel pipe pile in a combined pile of a PC construction method adopts a movable steel pipe pile, the movable steel pipe pile comprises a locking section and an extension section, the length of the movable steel pipe pile can be adjusted by changing the length of the extension section in a cutting or welding mode, and the problem that whether the locking strips of the two steel pipe piles to be welded are aligned does not need to be considered, so that the movable steel pipe pile can be reused, the waste of the movable steel pipe pile is reduced, meanwhile, by arranging the limiting device, the displacement of the limiting device on the horizontal direction is avoided through the matching of the front pile and the first limiting hole, meanwhile, the horizontal direction of the movable steel pipe pile is limited through the matching of the second limiting hole and the movable steel pipe pile, thereby being beneficial to ensuring that the movable steel pipe pile keeps a vertical state in the process of pressing down, and being beneficial to buckling the movable lock catch part on the movable steel pipe pile and the fixed lock catch part of the front pile;
2. by installing the guide device, the bottom end of the movable lock catch part can abut against the side wall of the guide through groove in the process that the movable steel pipe pile is pressed down by the pile driver, and finally can be pulled out from the lower end opening of the guide through groove under the abutting guide of the side wall of the guide through groove and is matched with the fixed lock catch part right below the guide through groove, so that the movable lock catch part and the fixed lock catch part can be aligned and locked, and the construction efficiency of the steel pipe pile construction in the combined pile in the PC construction method is improved;
3. the cooperation of the positioning section of the movable steel pipe pile and the positioning hole of the guiding device is beneficial to improving the positioning precision of the movable steel pipe pile in the process of being pressed down.
Drawings
Fig. 1 is a schematic structural view of a steel pipe pile in the prior art.
Fig. 2 is a schematic structural diagram of a larsen steel sheet pile in the prior art.
Fig. 3 is a schematic diagram of the matching of a steel pipe pile and a larsen steel plate pile in the prior art.
Fig. 4 is a schematic view showing the fitting of a steel pipe pile and a steel pipe pile according to the prior art.
Fig. 5 is a schematic view of the movable steel pipe pile and the larsen steel sheet pile in the embodiment 1.
Fig. 6 is a schematic structural view of the movable steel-pipe pile in example 1.
Fig. 7 is a schematic structural view of the stopper device in embodiment 1.
Fig. 8 is a plan view of the stopper device in embodiment 1.
Fig. 9 is a schematic structural view of the guide device in embodiment 1.
Fig. 10 is a schematic view showing the fitting of the position restricting means and the guide means in embodiment 1.
Fig. 11 is a schematic view showing the engagement of the position restricting device and the guide device in an exploded state in example 1.
Fig. 12 is a schematic structural view of a stopper device in embodiment 2.
In the figure: 1. larsen steel sheet piles; 11. a web; 12. a side plate; 121. a second locking part; 131. fixing the latch hook; 132. fixing the lock groove; 2. moving the steel pipe pile; 21. a locking section; 22. a positioning section; 23. an extension section; 24. a locking strip; 241. a first locking portion; 25. a movable locking part; 251. a movable latch hook; 252. a movable lock slot; 26. a main steel pipe; 3. a limiting seat; 31. a first limit hole; 311. a first plane; 312. a second plane; 313. a third plane; 32. a second limiting hole; 321. a first limit plane; 322. a second limit plane; 323. a third limiting plane; 324. a fourth limiting plane; 33. a first limit groove; 34. buckling holes; 35. a second limit groove; 36. mounting a screw hole; 4. a guide device; 41. a left mounting section; 411. a left hole limiting groove; 42. a right mounting portion; 421. a limiting right hole groove; 43. a third limiting hole; 431. a guide hole; 432. positioning holes; 46. a guide through groove; 47. mounting a through hole; 51. mounting a column; 511. a first mounting stud; 512. a second mounting stud; 52. and (6) mounting the nut.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example 1:
referring to fig. 5, a construction method of a steel pipe pile in a PC construction method composite pile is a construction method of assembling a movable steel pipe pile 2 to a front pile already installed and fixed to the ground.
In the present embodiment, the front pile is a larsen steel sheet pile 1. The Larsen steel sheet pile 1 is integrally C-shaped and comprises a web plate 11 and two side plates 12 respectively connected to two sides of the web plate 11. The two side plates 12 are provided with a fixed locking part at one side far away from the web plate 11. The fixing latch part is provided with a fixing latch hook 131 at a side far from the side plate 12, and a fixing latch groove 132 is formed at the fixing latch hook 131.
Referring to fig. 5 and 6, the movable steel pipe pile 2 sequentially includes a locking section 21, a positioning section 22 and an extension section 23 from top to bottom. The outer side wall of the locking section 21 of the movable steel pipe pile 2 is provided with two lock catch strips 24 which are bilaterally symmetrical relative to the movable steel pipe pile 2, the two lock catch strips 24 are circumferentially spaced by 180 degrees and are parallel to the axis of the movable steel pipe pile 2, and each lock catch strip 24 is provided with a movable lock catch part 25 which is buckled with the fixed lock catch part of the Larsen steel plate pile 1. The movable latch portion 25 is provided with a movable latch hook 251 at a side away from the locking section 21, and the movable latch portion 25 is formed with a movable latch groove 252 at the movable latch hook 251. In this embodiment, the length of the locking section 21 in the movable steel pipe pile 2 is 10 meters, the length of the positioning section 22 in the movable dry pipe pile is 1 meter, and the length of the extension section 23 in the movable steel pipe pile 2 is 4 meters.
The outer diameter of the movable steel pipe pile 2 in the extension section 23 is consistent with that of the locking section 21, and the outer diameter of the movable steel pipe pile 2 in the positioning section 22 is larger than that of the extension section 23 and that of the locking section 21. Wherein, the outer surface of the positioning section 22 of the movable steel pipe pile 2 is polished, so that the outer surface of the positioning section 22 of the movable steel pipe pile 2 is smooth. In the present embodiment, the outer diameter of the movable steel pipe pile 2 in the positioning section 22 is 7mm larger than that in the extension section 23.
When the fixed locking part of the larsen steel sheet pile 1 and the movable locking part 25 of the movable steel pipe pile 2 are mutually locked, the fixed locking hook 131 of the fixed locking part is clamped into the movable locking groove 252 of the movable locking part 25, and the movable locking hook 251 of the movable locking part 25 is clamped into the fixed locking groove 132 of the fixed locking part, so that the assembly of the larsen steel sheet pile 1 and the movable steel pipe pile 2 is realized.
In the construction method of the steel pipe pile in the combined pile of the PC method, a pile driver, a limiting device and a guiding device 4 are mainly used.
Referring to fig. 5, 7 and 8, the position limiting device includes a position limiting base 3. The limiting seat 3 is rectangular and has a first limiting hole 31 for limiting the horizontal displacement of the Larsen steel sheet pile 1 and a second limiting hole 32 for limiting the horizontal displacement of the movable steel pipe pile 2 to be installed. The first limiting hole 31 and the second limiting hole 32 penetrate through the upper and lower surfaces of the limiting seat 3.
The limiting seat 3 is provided with a first plane 311 attached to the web 11 of the larsen steel sheet pile 1, a second plane 312 attached to the two side plates 12 of the larsen steel sheet pile 1, and a third plane 313 against which the two fixing locking parts of the larsen steel sheet pile 1 abut, in the first limiting hole 31.
At least three movable limiting planes matched with the outer side wall of the movable steel pipe pile 2 are arranged on the inner wall of the second limiting hole 32 of the limiting seat 3. In this embodiment, the limiting seat 3 is provided with four movable limiting planes on the inner wall of the second limiting hole 32 for matching with the outer side wall of the movable steel sheet pile. The four movable limiting planes are a first limiting plane 321, a second limiting plane 322, a third limiting plane 323 and a fourth limiting plane 324 respectively. The first limiting plane 321 and the second limiting plane 322 are located on one side of the second limiting hole 32 close to the first limiting hole 31, the first limiting plane 321 is parallel to the third limiting plane 323, and the second limiting plane 322 is parallel to the fourth limiting plane 324.
The outer side surface of the first position-limiting hole 31 on the side opposite to the second position-limiting hole 32 of the position-limiting base 3 is provided with a first position-limiting groove 33 communicated with the first position-limiting hole 31. The bottom of first spacing groove 33 and the bottom surface intercommunication of spacing seat 3, first spacing groove 33 and top do not communicate with the top surface of spacing seat 3 for when spacing seat 3 was installed on larsen steel sheet pile 1, the fixed hasp portion of keeping away from activity steel-pipe pile 2 in the larsen steel sheet pile 1 can insert first spacing groove 33, and has the clearance between the top of this fixed hasp portion and the top lateral wall of first spacing groove 33.
The limiting seat 3 is further provided with a buckling hole 34 communicating the first limiting hole 31 and the second limiting hole 32. The fastening hole 34 vertically runs through the upper and lower surfaces of the limiting seat 3, so that the fixed fastening part close to the movable steel pipe pile 2 in the larsen steel plate pile 1 can be inserted into the fastening hole 34 from the bottom to the top, and the movable fastening part close to the larsen steel plate pile 1 in the movable steel pipe pile 2 can be inserted into the fastening hole 34 from the top to the bottom, and the movable fastening part and the fixed fastening part located in the fastening hole 34 are fastened with each other.
The limiting seat 3 is further provided with a second limiting groove 35 at one side of the second limiting hole 32 far away from the first limiting hole 31. The second limiting groove 35 penetrates through the upper surface and the lower surface of the limiting seat 3, and the movable buckling part on one side of the movable steel sheet pile, which is far away from the larsen steel sheet pile 1, can penetrate through the second limiting groove 35 from top to bottom.
The top surface of the limiting base 3 is provided with two mounting screw holes 36 on the left and right sides of the second limiting hole 32.
Referring to fig. 9, the guide 4 is composed of a left mounting portion 41 and a right mounting portion 42, and the left mounting portion 41 and the right mounting portion 42 are arranged in bilateral symmetry. In the present embodiment, the height of the guide 4 is 0.7 m.
The guide device 4 has a third stopper hole 43 penetrating the upper and lower surfaces of the guide device 4 and allowing the movable steel-pipe pile 2 to pass through. The third limit hole 43 is composed of a limit left hole slot 411 provided in the left mounting portion 41 and a limit right hole slot 421 provided in the right mounting portion 42.
The third position-limiting hole 43 includes a guide hole 431 and a positioning hole 432 in this order from top to bottom. The guide hole 431 is a taper hole, the aperture of the guide hole 431 is gradually reduced along the direction from top to bottom, and the aperture of the bottom end of the guide hole 431 is consistent with that of the guide hole 431.
Referring to fig. 6 and 9, the aperture of the positioning hole 432 is consistent with the outer diameter of the movable steel-pipe pile 2 at the positioning section 22, so that the movable steel-pipe pile 2 is inserted into the third limiting hole 43 of the guiding device 4 from top to bottom, and when the positioning section 22 of the movable steel-pipe pile 2 is matched with the positioning hole 432, the positioning accuracy of the movable steel-pipe pile 2 on the guiding device 4 is improved.
The guiding device 4 is further provided with a guiding through slot 46 for the two movable locking parts 25 of the movable steel-pipe pile 2 to pass through. The two guiding through grooves 46 are respectively arranged in the middle of the limiting left hole groove 411 and the limiting right hole groove 421.
The guide through groove 46 vertically penetrates through the upper and lower surfaces of the spacing block 3. The width of the guiding through groove 46 is gradually cut off along the vertical downward direction, and the two side walls of the guiding through groove 46 are symmetrically arranged and form an included angle of 83 degrees with the horizontal plane.
Referring to fig. 10 and 11, the guide 4 is detachably mounted on the top surface of the stopper. The guide device 4 has an installation through hole 47 corresponding to the installation screw hole 36 at the top end of the limit seat 3, and an installation column 51 inserted into the installation through hole 47 is installed at the top end of the limit seat 3 through screw threads. The bottom of the mounting column 51 is provided with a first mounting stud 511 matched with the mounting screw hole 36, the top of the mounting column 51 is provided with a second mounting stud 512, and the second mounting stud 512 is provided with a mounting nut 52 for pressing the guide device 4 on the top surface of the limiting device. Wherein the outer diameter of the mounting post 51 and the inner diameter of the mounting through hole 47 are kept uniform. In the present embodiment, the left mounting portion 41 and the right mounting portion 42 of the guide 4 each have two mounting through holes 47.
When the guiding device 4 is installed on the top surface of the limiting device, the third limiting hole 43 of the guiding device 4 is right opposite to the second limiting hole 32 of the limiting device, the two guiding through grooves 46 of the guiding device 4 are right opposite to the buckling hole 34 and the second limiting groove 35 respectively, so that the movable steel pipe pile 2 passing through the guiding device 4 from top to bottom can normally enter the second limiting hole 32 of the limiting device, the movable locking part 25 of the movable steel pipe pile 2 close to the Larsen steel plate pile 1 is buckled with the fixed locking part of the Larsen steel plate pile 1, and the movable locking part 25 of the movable steel pipe pile 2 far away from the Larsen steel plate pile 1 is normally inserted into the second limiting groove 35.
Referring to fig. 1 to 10, a construction method of a steel pipe pile in a combined pile in a PC construction method includes the following steps:
s1, leveling the construction site, and installing the limiting device at the Larsen steel sheet pile 1 by using a crane, so that the part of the Larsen steel sheet pile 1 extending out of the ground is inserted into the first limiting hole 31 of the limiting device;
s2, hoisting the movable steel pipe pile 2 by using a pile driver, enabling the movable steel pipe pile 2 to be located above the second limiting hole 32 of the limiting device, adjusting the circumferential angle of the movable steel pipe pile 2, enabling the movable locking part 25 of the movable steel pipe pile 2 to be opposite to the fixed locking part of the Larsen steel plate pile 1 close to the second limiting hole 32, gradually lowering the movable steel pipe pile 2, and enabling the bottom end of the movable steel pipe pile 2 to be inserted into the second limiting hole 32;
s3, after the bottom of the movable steel pipe pile 2 is abutted to the ground, the movable steel pipe pile 2 is pressed down by using a pile driver, and when the bottom end of the movable locking part 25 of the movable steel pipe pile 2 is 2 meters away from the top surface of the limiting device, the movable steel pipe pile 2 stops being pressed down;
mounting the mounting post 51 on the limiting device, sequentially mounting the left mounting part 41 and the right mounting part 42 of the guide device 4 on the limiting device by using a crane, and respectively fixing the left mounting part 41 and the right mounting part 42 on the top surface of the limiting device by using mounting nuts 52;
coating a layer of lubricating grease on the outer surface of the movable steel pipe pile 2, continuously pressing the movable steel pipe pile 2 by using a pile driver, and after the positioning section 22 of the movable steel pipe pile 2 enters the positioning hole 432 of the guide device 4, under the matching of the positioning hole 432 and the positioning section 22, the positioning precision of the movable steel pipe pile 2 in the horizontal direction is improved;
along with the movable steel pipe pile 2 is pressed down by the pile driver, the movable locking part 25 of the movable steel pipe pile 2 enters the guide through groove 46 of the guide device 4, and under the guide action of the two side walls of the guide through groove 46, the movable steel pipe pile 2 rotates in the circumferential direction, so that the movable locking parts 25 on the two sides of the movable steel pipe pile 2 are respectively opposite to the buckling hole 34 of the limiting device and the second limiting hole 32;
after the movable locking part 25 of the movable steel pipe part is buckled with the fixed locking part of the Larsen steel sheet pile 1, the guide device 4 is detached from the top surface of the limiting device;
and S4, driving the movable steel pipe pile 2 to a designed elevation by using a pile driver, and removing the limiting device.
Example 2:
a construction method of a steel pipe pile in a combined pile of a PC construction method is a construction method of splicing a movable steel pipe pile 2 to a front pile which is already installed and fixed on the ground. In this embodiment, the structure of the limiting device is the same as that of embodiment 1 except that the front pile is a fixed steel pipe pile, and the structure of the limiting device is different from that of embodiment 1.
The structure of the fixed steel pipe pile is identical to that of the movable steel sheet pile in example 1, and is fixed to the ground. Wherein, the lock catch parts on the two lock catch strips 24 for fixing the steel pipe pile are fixed lock catch parts.
Referring to fig. 11, the structure of the position limiting device is the same as that of the position limiting device of embodiment 1 except that the structure of the position limiting device at the first position limiting hole 31 is different from that of the position limiting device of embodiment 1. In this embodiment, the first limiting hole 31 is a circular hole that is engaged with the locking section 21 for fixing the steel pipe pile.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. A construction method of a steel pipe pile in a combined pile based on a PC construction method is characterized by comprising the following steps: s1, mounting a limiting device on the front pile; the limiting device is provided with a first limiting hole (31) for limiting the horizontal displacement of the front pile and a second limiting hole (32) for limiting the horizontal displacement of the movable steel pipe pile (2) to be installed; the front pile is provided with a fixed locking part (13); the movable steel pipe pile (2) sequentially comprises a locking section (21) and an extension section (23) from top to bottom, two lock strips (24) which are bilaterally symmetrical relative to the movable steel pipe pile (2) are arranged on the outer side wall of the locking section (21) of the movable steel pipe pile (2), the two lock strips (24) are circumferentially spaced by 180 degrees and are parallel to the axis of the movable steel pipe pile (2), and the lock strips (24) are provided with movable lock catch parts (25) matched with the fixed lock catch parts (13) of the front pile; s2, after the movable steel pipe pile (2) is lifted by using a pile driver, adjusting the circumferential angle of the movable steel pipe pile (2) to enable the movable locking part (25) of the movable steel pipe pile (2) to be opposite to the fixed locking part (13) of the front pile, gradually lowering the movable steel pipe pile (2) to enable the bottom end of the movable steel pipe pile (2) to be inserted into the second limiting hole (32); s3, when the bottom of the movable steel pipe pile (2) is abutted against the ground, a pile driver is used for pressing down the movable steel pipe pile (2) so that the movable locking part (25) of the movable steel pipe pile (2) is locked with the fixed locking part (13) of the front pile; and S4, driving the movable steel pipe pile (2) to a designed elevation by using a pile driver.
2. The construction method of the steel pipe pile in the combined pile constructed by the PC construction method according to claim 1, wherein the movable steel pipe pile (2) is provided with at least three movable limiting planes at the second limiting hole (32) for being matched with the outer side wall of the movable steel pipe pile (2).
3. The construction method of the steel pipe pile in the combined pile constructed by the PC construction method according to claim 1, wherein the front pile is a Larsen steel plate pile (1), and the limiting device is provided with a first plane (311) attached to a web (11) of the Larsen steel plate pile (1), two second planes (312) respectively attached to two side plates (12) of the Larsen steel plate pile (1) and a third plane (313) against which two fixing lock catch parts (13) of the Larsen steel plate pile (1) abut simultaneously in the first limiting hole (31).
4. The construction method of the steel pipe pile in the PC method combined pile according to claim 1, wherein the front pile is a fixed steel pipe pile, and the first limiting hole (31) is a circular hole matched with the fixed steel pipe pile.
5. The method of constructing a steel pipe pile in a combined pile constructed by a PC method according to any one of claims 1 to 4, wherein the step S3 further comprises the steps of: when the bottom end of the movable locking part (25) is 2 meters away from the top surface of the limiting device, the movable steel pipe pile (2) stops being pressed downwards, a guide device (4) is installed on the limiting device, the guide device (4) is provided with a third limiting hole (43) for the movable steel pipe pile (2) to pass through, the guide device (4) is further provided with a guide through groove (46) for the movable locking part (25) of the movable steel pipe pile (2) to pass through, the width of the guide through groove (46) is gradually reduced, and the opening at the lower end of the guide through groove (46) is just opposite to the fixed locking part (13) of the front pile.
6. The construction method of the steel pipe pile in the combined pile of the PC construction method according to claim 5, wherein the movable steel pipe pile (2) is further provided with a positioning section (22) between an extension section (23) and the locking section (21), the outer diameters of the movable steel pipe pile (2) in the extension section (23) and the locking section (21) are consistent, and the outer diameter of the movable steel pipe pile (2) in the positioning section (22) is larger than the outer diameters of the extension section (23) and the locking section (21); the third limiting hole (43) sequentially comprises a guide hole (431) and a positioning hole (432) from top to bottom, and the aperture of the positioning hole (432) is larger than the outer diameter of the movable steel pipe pile (2) at the extension section (23); the aperture of the positioning hole (432) is larger than the outer diameter of the movable steel pipe pile (2) at the locking section (21); the aperture of the positioning hole (432) is consistent with the outer diameter of the movable steel pipe pile (2) at the positioning section (22).
7. The method of claim 6, wherein the step S3 further comprises the steps of: and when the bottom end of the positioning section (22) is 0.3 m away from the top end of the guide device (4), coating a layer of lubricating grease on the outer surface of the movable steel pipe pile (2) at the positioning section (22).
8. The construction method of the steel pipe pile in the combined pile manufactured by the PC construction method according to claim 5, wherein the guiding device (4) is composed of a left installation part (41) and a right installation part (42), the third limiting hole (43) is composed of a limiting left hole groove (411) arranged on the left installation part (41) and a limiting right hole groove (421) arranged on the right installation part (42), and the two guiding through grooves (46) are respectively arranged in the middle parts of the limiting left hole groove (411) and the limiting right hole groove (421).
9. The construction method of the steel pipe pile in the PC construction method combined pile according to claim 8, wherein the left installation part (41) and the right installation part (42) are provided with at least two installation through holes (47) penetrating through the upper end surface and the lower end surface of the left installation part, the guide device (4) is provided with an installation column (51) penetrating through the installation through holes (47) and matched with the installation through holes (47), the top end of the installation column (51) is provided with a second installation stud (512), and the second installation stud (512) is provided with an installation nut (52) pressing the left installation part (41)/the right installation part (42) on the limiting device.
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| CN113944152A (en) * | 2021-11-12 | 2022-01-18 | 上海建工五建集团有限公司 | Construction method of combined pile of steel pipe pile and steel sheet pile |
| CN114000515A (en) * | 2021-11-12 | 2022-02-01 | 上海建工五建集团有限公司 | Construction method of combined pile in PC construction method and special positioning sleeve |
| CN115341531A (en) * | 2022-07-20 | 2022-11-15 | 浙江大东吴集团建设有限公司 | Grille type Larsen pile soil outlet reinforcing device |
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| CN111206567B (en) | 2021-05-18 |
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