Semicircular secant pile construction method

Abstract

The invention discloses a semicircular secant pile construction method. The semicircular secant pile construction method comprises the steps that 1, a semicircular steel mold is manufactured; 2, drilling holes are formed in the positions where the secant piles need to be poured through drilling equipment; (3) the local semicircular reinforcement cage is lowered into the drill hole formed in the step (2) through hoisting equipment; 4, the semicircular steel mold manufactured in the step 1 is put down into the drill hole formed in the step 2, and the semicircular steel mold is spliced with the upper part section of the local semicircular reinforcement cage; 5, a concrete guide pipe is inserted into the drill hole, and concrete pouring is conducted; and 6, the semicircular steel mold is pulled out through hoisting equipment, so that the semicircular steel mold is separated from the drilled hole. Compared with a whole pile pouring and half concrete chiseling method, the semicircular secant pile construction method has the characteristics of simplicity, convenience, rapidness and good pile forming quality. And the semicircular mold can be repeatedly used. The construction method can reduce the consumption of concrete and the chiseling of concrete in the later period, and meets the requirement of green construction.

Description

Technical Field

[0001] The invention belongs to the technical field of occlusal piles, and in particular relates to a construction method of a semicircular occlusal pile. Background Art

[0002] With the acceleration of my country's urbanization process, rail transit has gradually become the most important means of public transportation in many cities. Especially in terms of subway construction, the density and complexity of urban transportation systems are constantly increasing, leading to higher requirements for construction technology and processes. Subway stations are often arranged at the intersections of urban main roads. In order to ensure the traffic capacity during construction, the top plate is often constructed in advance as a temporary passage. Since these top plates are usually buried deep, how to avoid settlement after construction and ensure the safety and stability of traffic has become a key technical problem currently faced. In the existing subway construction, when the retaining piles use bite piles, in order to avoid settlement after the top plate construction, the bite piles above the top plate are usually set as semicircular piles to form a support structure for the top plate.

[0003] However, although the semicircular pile structure has solved the settlement problem to a certain extent, in actual construction, the method of chiseling after integral casting still faces many challenges and shortcomings. First, the construction process of semicircular piles is complicated and requires high technical requirements. During the construction process, the chiseling of semicircular piles requires high technical level of construction equipment and construction personnel, which increases the difficulty of construction. Secondly, there are still certain limitations on the construction efficiency of semicircular piles in the prior art. Due to its complex construction process and involving multiple links, the construction cycle is often long, which leads to the construction party being unable to complete the construction in the shortest time when the progress of urban construction is relatively tight, affecting the advancement of the entire rail transit project. In addition, most of the existing semicircular interlocking pile construction schemes adopt traditional construction methods and lack efficient construction equipment and technical means. For example, traditional construction methods require a lot of manual operation, low construction efficiency, and are easily affected by factors such as the on-site environment, resulting in unstable construction quality. During the construction process, problems such as inaccurate pile position and uneven soil may also be faced, which further increases the difficulty and cost of construction. Summary of the invention

[0004] The invention aims to provide a semicircular occlusal pile construction method.

[0005] The technical solution of the present invention to solve the above technical problem is as follows: a semicircular occlusal pile construction method, comprising: Step 1, making a semicircular steel mold, wherein the semicircular steel mold is a columnar structure, and the cross section of the semicircular steel mold along the horizontal direction is a semicircle; Step 2, using a drilling device to form a borehole at a location where the interlocking pile needs to be cast; Step 3, lowering the partial semicircular steel cage into the drilled hole formed in step 2 by using a hoisting device; the partial semicircular steel cage is divided into an upper segment and a lower segment from top to bottom, the cross section of the upper segment along the horizontal direction is semicircular, and the cross section of the lower segment along the horizontal direction is circular; Step 4, lowering the semicircular steel mold made in step 1 into the drilled hole formed in step 2, and assembling the semicircular steel mold with the upper section of the local semicircular steel cage; Step 5, inserting the concrete conduit into the borehole and pouring concrete; Step 6, use the lifting equipment to pull out the semicircular steel mold to separate the semicircular steel mold from the drilled hole.

[0006] The semicircular interlocking pile construction method of the present invention as described above, preferably, the semicircular steel mold includes a back plate, a connecting plate, a supporting keel and a panel, one side of the connecting plate is vertically connected to the middle of the back plate, the supporting keel is a semicircular structure, both ends of the supporting keel are connected to the back plate, the cross-section of the panel is a semicircular structure, and the connecting part of the panel is connected to the back plate.

[0007] In the semicircular interlocking pile construction method of the present invention as described above, preferably, at least one first connection hole is provided on the upper portion of the back plate, and at least one second connection hole is provided on the upper portion of the connection plate.

[0008] The semicircular interlocking pile construction method of the present invention as described above preferably further comprises a reinforcing rod, one end of which is connected to the back plate, and the other end of which is connected to the supporting keel.

[0009] The semicircular interlocking pile construction method of the present invention as described above, preferably, the semicircular mold also includes a base plate, the base plate is a semicircular structure, and the base plate is sealed to the lower ends of the back plate and the panel; between step 4 and step 5, it also includes a step of filling the semicircular mold with heavy objects, and the heavy objects are sandbags.

[0010] In the above-mentioned semicircular interlocking pile construction method of the present invention, preferably, in step 4, a through bar having a length greater than the diameter of the drilled hole is set above the drilled hole, and the through bar passes through the first connecting hole of the back plate.

[0011] The semicircular interlocking pile construction method of the present invention as described above, preferably, the local semicircular steel cage includes a first vertical bar, a second vertical bar, a third vertical bar, a semicircular stirrup and a round stirrup, the sum of the lengths of the second vertical bar and the third vertical bar is equal to the length of the first vertical bar, the lower parts of the first vertical bar and the second vertical bar are arranged in a circular shape, and the round stirrup is connected to the periphery of the first vertical bar and the second vertical bar; the upper parts of the first vertical bar and the third vertical bar are arranged in a semicircular shape, and the semicircular stirrup is connected to the periphery of the first vertical bar and the third vertical bar; the length of the third vertical bar is equal to the length of the semicircular steel mold.

[0012] The semicircular interlocking pile construction method of the present invention as described above preferably further comprises positioning steel bars, wherein the positioning steel bars are fixed to the outer periphery of the partial semicircular steel cage.

[0013] The semicircular interlocking pile construction method of the present invention as described above preferably further comprises the step of applying a mold release agent before step 4, wherein the mold release agent is applied to the outer surface of the semicircular mold.

[0014] In the semicircular interlocking pile construction method of the present invention as described above, preferably, the semicircular steel mold begins to be removed 3 hours after the concrete pouring is completed, and is lifted up 0.5m every 0.5 hours from 3 hours to 5 hours, and the steel mold is slowly pulled out all at once after 5 hours.

[0015] Compared with the method of pouring the whole pile and then chiseling off half of the concrete, the semicircular interlocking pile construction method of the present invention is simple, fast and has good pile quality. The semicircular mold can be reused. For example, only two sets of semicircular interlocking piles need to be recycled in the construction of 36 semicircular interlocking piles. The method can reduce the consumption of concrete and the later removal of concrete, and meets the requirements of green construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or other advantages of the present invention will become clearer and easier to understand through the detailed description made in conjunction with the following drawings, which are only exemplary and do not limit the present invention, wherein: Figure 1 A schematic diagram of a process flow of a semicircular interlocking pile construction method according to an embodiment of the present invention; Figure 2 A schematic top view of a semicircular mold according to an embodiment of the present invention; Figure 3 This is a front view of a semicircular mold according to an embodiment of the present invention; Figure 4 It is a schematic diagram of the right side of a semicircular mold according to an embodiment of the present invention; Figure 5 A schematic diagram of a partial semicircular steel cage according to an embodiment of the present invention; Figure 6 for Figure 5 AA cross-sectional diagram of ; Figure 7 for Figure 5 BB cross-sectional diagram; Figure 8 This is a schematic diagram of the installation of a semicircular mold according to the first embodiment of the present invention; Fig. 9 This is a schematic diagram of the installation of a partial semicircular steel cage according to an embodiment of the present invention; Fig.10 This is a schematic diagram of the installation of a semicircular mold according to a second embodiment of the present invention; Fig.11 This is a schematic diagram of concrete pouring according to an embodiment of the present invention.

[0017] In the accompanying drawings, the components represented by the reference numerals are listed as follows: 10. Semicircular mold, 11. Back plate, 12. Connecting plate, 13. Support keel, 14. Reinforcing rod, 15. First connecting hole, 16. Round hole, 17. Second connecting hole, 20. Partial semicircular steel cage, 21. First vertical reinforcement, 22. Semicircular stirrups, 23. Round stirrups, 24. Second vertical reinforcement, 25. Third vertical reinforcement, 26. Positioning reinforcement, 27. Crown beam, 30. Guide wall, 40. Fill, 50. Through bar, 60. Wooden square, 70. Concrete conduit. DETAILED DESCRIPTION

[0018] Hereinafter, an embodiment of a semicircular occlusal pile construction method of the present invention will be described with reference to the accompanying drawings.

[0019] The embodiments described herein are specific embodiments of the present invention, which are used to illustrate the concept of the present invention, are illustrative and exemplary, and should not be construed as limiting the embodiments of the present invention and the scope of the present invention. In addition to the embodiments described herein, those skilled in the art can also adopt other obvious technical solutions based on the claims and the contents disclosed in the specification of this application, including technical solutions that adopt any obvious replacement and modification of the embodiments described herein.

[0020] The drawings of this specification are schematic diagrams, which assist in explaining the concept of the present invention and schematically show the shapes of various parts and their mutual relationships. Please note that in order to clearly show the structures of various components of the embodiments of the present invention, the drawings are not drawn according to the same scale. The same reference numerals are used to represent the same parts.

[0021] Combination Figures 1 to 11 A semicircular interlocking pile construction method according to an embodiment of the present invention is described, comprising: Step 1, making a semicircular steel mold, the semicircular steel mold is a columnar structure, and the cross section of the semicircular steel mold along the horizontal direction is a semicircular; according to the technical concept of the patent of the present invention, the role of the semicircular steel mold is to occupy the semi-cylindrical part that needs to be chiseled out after the concrete is poured in the prior art, so the diameter of the semicircular steel mold should be roughly equal to the diameter of the bite pile. And preferably, the diameter of the semicircular steel mold is slightly smaller than the diameter of the bite pile, so that the mold can be pulled out smoothly in the subsequent mold pulling construction.

[0022] When using a semicircular steel mold to cast a semicircular interlocking pile, the lower part of the semicircular steel mold is located at a deeper position and receives greater concrete pressure. Figures 2 to 4 In a specific embodiment shown, the semicircular steel mold includes a back plate 11, a connecting plate 12, a supporting keel 13 and a panel, one side of the connecting plate 12 is vertically connected to the middle of the back plate 11, the supporting keel 13 is a semicircular structure, the two ends of the supporting keel 13 are connected to the back plate 11, the cross section of the panel is a semicircular structure, and the connecting part of the panel is connected to the back plate 11. In an actual preparation process, a steel pipe of a required diameter is divided into two panels along a center line parallel to the axis, and each panel can be used to prepare a semicircular steel mold. The connecting part of the panel refers to the two side edges of the panel, and the two side edges of the panel are welded to the back plate. The main function of setting the supporting keel 13 is to facilitate the proper positioning of the panel and the back plate before welding the panel and the back plate. Supporting and positioning the panel by the supporting keel can provide convenience for construction, improve the efficiency and quality of construction, and avoid problems caused by the misalignment of the panel and the back plate, and the panel and the connecting plate. In addition, the supporting keel is combined with the connecting plate to support the panel, so as to avoid the panel of the semicircular steel mold from being compressed and deformed during the concrete pouring process.

[0023] In a further preferred embodiment, at least one first connection hole 15 is provided on the upper portion of the back plate 11, and at least one second connection hole 17 is provided on the upper portion of the connection plate 12. The provision of the first connection hole facilitates the installation of the hook, thereby facilitating the movement and loading and unloading of the semicircular steel mold.

[0024] In a further preferred embodiment, Figure 2 As shown, it also includes a reinforcing rod 14, one end of which is connected to the back plate 11, and the other end of which is connected to the supporting keel 13. The reinforcing rod can further improve the strength of the supporting keel to prevent the panel of the semicircular steel mold from being compressed and deformed during the concrete pouring process.

[0025] In a further preferred embodiment, the semicircular mold 10 further includes a bottom plate, which is a semicircular structure, and is sealed and connected to the lower ends of the back plate 11 and the panel; between step 4 and step 5, a step of filling the semicircular mold 10 with heavy objects is included, and the heavy objects are sandbags. On the one hand, the bottom of the semicircular mold is sealed by the bottom plate to prevent liquid or sand and gravel from entering the interior of the semicircular mold during concrete pouring and affecting its secondary use. However, the semicircular mold with a sealed bottom will float during the concrete pouring process. Therefore, the step of filling the semicircular mold 10 with heavy objects can prevent the semicircular mold from floating and shifting, thereby ensuring the construction quality of the semicircular bite pile.

[0026] In a further preferred embodiment, circular holes 16 are arranged at intervals on the connecting plate 12. The arrangement of the circular holes can reduce the weight of the connecting plate and save the steel plate material used.

[0027] Step 2: Use drilling equipment to form a borehole at the location where the bite pile needs to be cast; the diameter of the required borehole needs to be compatible with (roughly equal to) the diameter of the semicircular bite pile.

[0028] Step 3, lowering the partial semicircular steel cage 20 into the drilled hole formed in step 2 by using a hoisting device; the partial semicircular steel cage 20 is divided into an upper section and a lower section from top to bottom, the cross section of the upper section along the horizontal direction is semicircular, and the cross section of the lower section along the horizontal direction is circular; In a preferred embodiment, the combination Figures 5 to 7 The local semicircular steel cage 20 includes a first vertical rib 21, a second vertical rib 24, a third vertical rib 25, a semicircular stirrup 22 and a round stirrup 23. The sum of the lengths of the second vertical rib 24 and the third vertical rib 25 is equal to the length of the first vertical rib 21. The lower parts of the first vertical rib 21 and the second vertical rib 24 are arranged in a circular shape, and the round stirrup 23 is connected to the periphery of the first vertical rib 21 and the second vertical rib 24. The upper parts of the first vertical rib 21 and the third vertical rib 25 are arranged in a semicircular shape, and the semicircular stirrup 22 is connected to the periphery of the first vertical rib 21 and the third vertical rib 25. The length of the third vertical rib 25 is equal to the length of the semicircular steel mold. The local semicircular steel cage of the above structure forms a vacant structure that matches the semicircular steel mold at the upper part of the second vertical rib 24, which can save the steel material of this part in the preparation stage of the steel cage, and avoid the complex and difficult operation of chiseling concrete and cutting steel bars in the later stage in the prior art.

[0029] exist Figure 5In the figure, a crown beam 27 is also shown. During the installation and construction of the partial semicircular steel cage 20, the upper end of the second vertical reinforcement 24 of the partial semicircular steel cage is anchored into the crown beam 27, so that the partial semicircular steel cage 20 can be positioned to avoid position movement due to the stirring of concrete, buoyancy, etc. during concrete pouring.

[0030] In a further preferred embodiment, Figure 5 As shown, it also includes positioning steel bars 26, which are fixed to the outer periphery of the local semicircular steel cage 20. Figure 5 The middle positioning steel bar is located at the lower part of the partial semicircular steel cage, because there is a round stirrup 23 at the lower part of the partial semicircular steel cage, and the positioning steel bars can be arranged at intervals along the round stirrups and fixedly connected to the round stirrups. The function of the positioning steel bar is to realize the positioning of the partial semicircular steel cage, for example, the positioning steel bar is connected to the positioning steel bar inserted into the drill hole, so as to avoid the displacement of the partial semicircular steel cage during the concrete pouring process.

[0031] Step 4, lowering the semicircular steel mold made in step 1 into the drilled hole formed in step 2, and assembling the semicircular steel mold with the upper section of the local semicircular steel cage 20; In a preferred embodiment of the semicircular interlocking pile construction method, in step 4, a through rod 50 having a length greater than the diameter of the drilled hole is set above the drilled hole, and the through rod 50 passes through the first connecting hole 15 of the back plate 11. Figure 8 and Fig. 9 As shown, a wooden square 60 is further provided below the through bar 50 . The provision of the wooden square 60 can increase the contact area between the through bar 50 and the ground, and stabilize the support of the through bar 50 .

[0032] In a further preferred embodiment, a step of applying a release agent is further included before step 4, where the release agent is applied to the outer surface of the semicircular mold 10. By applying the release agent, the mold can be pulled out more smoothly to avoid jamming.

[0033] Step 5, such as Fig.11 As shown, the concrete pipe 70 is inserted into the borehole and concrete is poured; Step 6, use the lifting equipment to pull out the semicircular steel mold to make the semicircular steel mold detach from the drill hole. In a further preferred embodiment, in step 6, the semicircular steel mold begins to be pulled out 3 hours after the concrete pouring is completed, and is lifted up by 0.5m every 0.5h from 3h to 5h. After 5h, the steel mold is slowly pulled out all at once.

[0034] Combination Figures 8 to 11As shown, before the construction of the semicircular interlocking pile, a guide wall 30 has been constructed in advance at the corresponding position, and there is fill 40 around the guide wall 30. The guide wall can be used as a support for heavy objects. It is not only a support for the trenching machine track, but also a fulcrum for the placement of steel cages, joint pipes, etc., and sometimes also bears the load of other construction equipment.

[0035] The technical features disclosed above are not limited to the disclosed combinations with other features. Those skilled in the art may also make other combinations between the technical features according to the purpose of the invention to achieve the purpose of the invention.

Claims

1. A semicircular occlusal pile construction method, characterized in that: include: Step 1, making a semicircular steel mold, wherein the semicircular steel mold is a columnar structure, and the cross section of the semicircular steel mold along the horizontal direction is a semicircle; Step 2, using a drilling device to form a borehole at a location where the interlocking pile needs to be cast; Step 3, lowering the partial semicircular steel cage (20) into the drill hole formed in step 2 by using a lifting device; the partial semicircular steel cage (20) is divided into an upper section and a lower section from top to bottom, the cross section of the upper section along the horizontal direction is semicircular, and the cross section of the lower section along the horizontal direction is circular; Step 4, lowering the semicircular steel mold made in step 1 into the drilled hole formed in step 2, and assembling the semicircular steel mold with the upper section of the local semicircular steel cage (20); Step 5, inserting the concrete conduit (70) into the borehole and pouring concrete; Step 6, use the lifting equipment to pull out the semicircular steel mold to separate the semicircular steel mold from the drilled hole.

2. The semicircular occlusal pile construction method according to claim 1, characterized in that: The semicircular steel mold comprises a back plate (11), a connecting plate (12), a supporting keel (13) and a panel, one side of the connecting plate (12) is vertically connected to the middle of the back plate (11), the supporting keel (13) is a semicircular structure, both ends of the supporting keel (13) are connected to the back plate (11), the cross-section of the panel is a semicircular structure, and the connecting part of the panel is connected to the back plate (11).

3. The semicircular occlusal pile construction method according to claim 2, characterized in that: At least one first connection hole (15) is provided on the upper portion of the back plate (11), and at least one second connection hole (17) is provided on the upper portion of the connection plate (12).

4. The semicircular occlusal pile construction method according to claim 2, characterized in that: It also comprises a reinforcing rod (14), one end of which is connected to the back plate (11), and the other end of which is connected to the supporting keel (13).

5. The semicircular occlusal pile construction method according to claim 2, characterized in that: The semicircular mold (10) also includes a bottom plate, which is a semicircular structure and is sealed to the lower ends of the back plate (11) and the panel. Between step 4 and step 5, there is also a step of filling the semicircular mold (10) with a heavy object, wherein the heavy object is a sandbag.

6. The semicircular occlusal pile construction method according to claim 3, characterized in that: In step 4, a through rod (50) having a length greater than the diameter of the drilled hole is arranged above the drilled hole, and the through rod (50) passes through the first connecting hole (15) of the back plate (11).

7. The semicircular occlusal pile construction method according to claim 1, characterized in that: The partially semicircular steel cage (20) comprises a first vertical rib (21), a second vertical rib (24), a third vertical rib (25), a semicircular stirrup (22) and a round stirrup (23); the sum of the lengths of the second vertical rib (24) and the third vertical rib (25) is equal to the length of the first vertical rib (21); the lower parts of the first vertical rib (21) and the second vertical rib (24) are arranged in a circular shape, and the round stirrup (23) is connected to the periphery of the first vertical rib (21) and the second vertical rib (24); the upper parts of the first vertical rib (21) and the third vertical rib (25) are arranged in a semicircular shape, and the semicircular stirrup (22) is connected to the periphery of the first vertical rib (21) and the third vertical rib (25); the length of the third vertical rib (25) is equal to the length of the semicircular steel mold.

8. The semicircular occlusal pile construction method according to claim 7, characterized in that: It also includes positioning steel bars (26), which are fixed to the outer periphery of the partial semicircular steel cage (20).

9. The semicircular interlocking pile construction method according to claim 1 is characterized in that, before step 4, it also includes the step of applying a release agent, and the release agent is applied to the outer surface of the semicircular mold (10).

10. The semicircular occlusal pile construction method according to claim 1, characterized in that: In step 6, the semicircular steel mold begins to be removed 3 hours after the concrete pouring is completed, and is lifted up 0.5m every 0.5 hours from 3 hours to 5 hours. After 5 hours, the steel mold is slowly pulled out all at once.

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