A fabricated pier column structure and a construction method thereof

Abstract

The application relates to the technical field of pier construction, and particularly discloses a fabricated pier column structure and a construction method thereof, a bearing platform comprising embedded steel bars and a first embedded steel pipe; a first standard section is provided with a second embedded steel pipe and a third embedded steel pipe, both of which are connected to a first steel pipe socket of the first embedded steel pipe and sleeved outside the steel bars; a second standard section is provided with a fourth embedded steel pipe and a fifth embedded steel pipe; the fourth embedded steel pipe is connected to a second steel pipe socket of the second embedded steel pipe; the fifth embedded steel pipe is connected to a first tensioning slot of the third embedded steel pipe; the first standard section and the second standard section are provided with a plurality of sections and are arranged in an interlaced and stacked mode; a pier cap is provided with a sixth embedded steel pipe and is connected to a second steel pipe socket or a third steel pipe socket. The first standard section and the second standard section are alternately installed, the bearing platform and the pier cap are matched, and the overall pier column installation is completed; the first standard section and the second standard section are prefabricated, so that the working efficiency is improved and different pier column heights can be adapted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pier construction, in particular to a prefabricated pier structure and a construction method thereof. BACKGROUND

[0002] Pier construction is a key process that restricts the construction period of a bridge. Because of high appearance requirements, the height of one compartment is limited by the rigidity of the formwork, and the processes of erecting a support, reinforcing steel bar installation, formwork erection and dismantling during construction occupy a long time, the efficiency of pier construction is low, especially for high pier construction.

[0003] The prior art has various limitations such as great difficulty in actual operation, high construction cost, unsuitability for high piers, unsuitability for large bridges with heavy load, etc. It is difficult to realize wide popularization and application, and it cannot meet the sustainable development concept of rapid construction and economic rationality.

[0004] To improve the construction efficiency, a prefabricated pier structure is provided to realize early prefabrication of the pier and shorten the installation efficiency. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a prefabricated pier structure and a construction method thereof, which solve the problems of high cost during pier construction, difficulty in adapting to all situations for high piers, and limitation of rapid construction.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows: a prefabricated pier structure, comprising a first standard section, a second standard section, a pile cap and a pier cap;

[0007] The pile cap comprises steel bars embedded in the pile cap and a first embedded steel pipe; the steel bars are vertically arranged in multiple roots and extend out of the upper part of the pile cap; the first embedded steel pipe is sleeved outside the steel bars, the upper part is provided with a first steel pipe socket, and the lower part of the first embedded steel pipe is provided with a transverse grouting nozzle, the transverse grouting nozzle extends out of the upper end surface of the pile cap through a grouting pipe;

[0008] The first standard section is internally provided with a second embedded steel pipe and a third embedded steel pipe; the second embedded steel pipe is vertically arranged, the upper end is provided with a second steel pipe socket, and the lower end is provided with a first grouting inlet after penetrating out of the lower part of the first standard section; the third embedded steel pipe is vertically arranged, the upper end is provided with a first tensioning slot, and the lower end penetrates out of the first standard section; the second embedded steel pipe and the third embedded steel pipe are both connected to the first steel pipe socket of the first embedded steel pipe and sleeved outside the steel bars;

[0009] The second standard section is internally provided with a fourth embedded steel pipe and a fifth embedded steel pipe; the fourth embedded steel pipe is vertically arranged, and is provided with a second tensioning notch at the upper end and a second steel pipe socket connected to the second embedded steel pipe at the lower end after penetrating out of the second standard section; the fifth embedded steel pipe is vertically arranged, and is provided with a third steel pipe socket at the upper end and a second grout inlet at the lower end after penetrating out of the lower part of the second standard section, the second grout inlet being connected to a first tensioning notch of a third embedded steel pipe; the fourth embedded steel pipe and the fifth embedded steel pipe are sleeved on the steel bars outside;

[0010] The first standard section and the second standard section are provided with a plurality of sections and are arranged in an interlaced and stacked manner.

[0011] The pier cap is internally provided with a sixth embedded steel pipe; the sixth embedded steel pipe is vertically arranged, and is provided with a third tensioning notch at the upper end and a second steel pipe socket or a third steel pipe socket connected to the second steel pipe socket at the lower end.

[0012] As a further technical scheme of the above scheme, the second embedded steel pipe, the third embedded steel pipe, the fourth embedded steel pipe and the fifth embedded steel pipe are each provided with a plurality of sections.

[0013] As a further technical scheme of the above scheme, the method further comprises a leveling plate arranged on the top of the bearing platform.

[0014] As a further technical scheme of the above scheme, the steel bar is a finished rolled threaded steel bar, and the finished rolled threaded steel bar is spliced in multiple sections and connected through a connecting piece.

[0015] As a further technical scheme of the above scheme, the first embedded steel pipe is fixed at the bottom through a lower anchor pad and a lower nut.

[0016] As a further technical scheme of the above scheme, the bottom of the second tensioning notch is provided with a notch pad, and the lower part of the tensioning notch is connected to the fourth embedded steel pipe below through a grout overflow pipe.

[0017] A fabricated pier column structure construction method, comprising the following construction steps,

[0018] S1, internally embedding a steel bar, a first embedded steel pipe and a grouting pipe in a bearing platform;

[0019] S2, the first standard section is an odd-numbered assembly section from bottom to top, and the third embedded steel pipe with a tensioning notch and the second embedded steel pipe with a socket are arranged in an interlaced manner in the concrete structure; during installation, the second embedded steel pipe is sleeved on the steel bar, the third embedded steel pipe is sleeved on the adjacent steel bar in the bearing platform by falling, and the first standard section continues to fall above the top surface of the bearing platform;

[0020] S3, the second standard section is the even assembly section from bottom to top, the fourth embedded steel pipe with a tension slot and the fifth embedded steel pipe with a socket are arranged in the concrete structure in an interlaced manner; the fifth embedded steel pipe is corresponded with the position of the third embedded steel pipe, and the fourth embedded steel pipe is corresponded with the position of the second embedded steel pipe; the fifth embedded steel pipe is sleeved on the steel bar, and the fourth embedded steel pipe is sleeved on the steel bar by falling; the second standard section is continuously lowered to be above the first standard section;

[0021] S4, the first standard section and the second standard section are alternately installed until the pier cap is installed at the pier cap elevation, the sixth embedded steel pipe is sleeved on the steel bar below, and is lowered to be above the first standard section or the second standard section;

[0022] S5, before tensioning of each section, verticality re-measurement is required, and if the section is not perpendicular to the ground, steel wedge-shaped plates are used for leveling;

[0023] S6, after tensioning of all pier column sections is completed, the section joint with the leveling steel wedge-shaped plate arranged from top to bottom is processed, the hoop corresponding to the size of the pier column is installed at the joint to be processed, the top of the hoop is provided with a U-shaped groove, and the U-shaped groove can be used to collect excess slurry, and the epoxy resin mortar is injected from the lower side of the joint.

[0024] Compared with the prior art, the present application has the following advantages and beneficial effects: the first standard section and the second standard section are alternately installed, the bearing platform and the pier cap are cooperated to complete the installation of the whole pier column; the first standard section and the second standard section are prefabricated, which improves the work efficiency and adapts to different pier column heights. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a front structure schematic view of the present application.

[0026] Figure 2 It is Figure 1 A structure enlarged view in the middle.

[0027] Figure 3 It is Figure 1 A structure enlarged view in the middle.

[0028] Figure 4 It is a top view structure schematic view of the first standard section.

[0029] Figure 5 It is Figure 4 An AA cross section schematic view.

[0030] Figure 6 It is a top view structure schematic view of the second standard section.

[0031] Figure 7 It is Figure 6 A BB cross section schematic view.

[0032] The first standard section 1, the second embedded steel pipe 11 and the third embedded steel pipe 12 are arranged inside; the second embedded steel pipe 11 is vertically arranged, the upper end is provided with the second steel pipe socket 111, and the lower end is provided with the first grouting port 112 after penetrating out of the lower part of the first standard section 1; the third embedded steel pipe 12 is vertically arranged, the upper end is provided with the first tensioning slot 121, and the lower end penetrates out of the first standard section 1; the second embedded steel pipe 11 and the third embedded steel pipe 12 are connected to the first steel pipe socket 321 of the first embedded steel pipe 32 and are sleeved outside the steel bars 31; DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, so as to have a further understanding of the concept of the present application, the solved technical problems, the technical features constituting the technical solutions and the brought technical effects.

[0034] As shown in the drawings, an assembled pier column structure comprises a first standard section 1, a second standard section 2, a pile cap 3 and a pier cap 4; Figures 1-7

[0035] The pile cap 3 comprises steel bars 31 and a first embedded steel pipe 32 embedded in the pile cap 3; the steel bars 31 are vertically arranged in multiple, and extend out of the upper part of the pile cap 3; the first embedded steel pipe 32 is sleeved outside the steel bars 31, the upper part is provided with a first steel pipe socket 321, and the lower part of the first embedded steel pipe 32 is provided with a transverse grouting nozzle 322, which extends out of the upper end surface of the pile cap 3 through a grouting pipe 35;

[0036] The first standard section 1 is internally provided with the second embedded steel pipe 11 and the third embedded steel pipe 12; the second embedded steel pipe 11 is vertically arranged, the upper end is provided with the second steel pipe socket 111, and the lower end is provided with the first grouting port 112 after penetrating out of the lower part of the first standard section 1; the third embedded steel pipe 12 is vertically arranged, the upper end is provided with the first tensioning slot 121, and the lower end penetrates out of the first standard section 1; the second embedded steel pipe 11 and the third embedded steel pipe 12 are connected to the first steel pipe socket 321 of the first embedded steel pipe 32 and are sleeved outside the steel bars 31;

[0037] ​The second standard section 2 is internally provided with a fourth embedded steel pipe 21 and a fifth embedded steel pipe 22; the fourth embedded steel pipe 21 is vertically arranged, and is provided with a second tensioning notch 211 at the upper end and a second steel pipe socket 111 connected to the second embedded steel pipe 11 at the lower end after penetrating out of the second standard section 2; the fifth embedded steel pipe 22 is vertically arranged, and is provided with a third steel pipe socket 221 at the upper end and a second grout inlet 222 provided at the lower end after penetrating out of the lower part of the second standard section 2, and the second grout inlet 222 is connected to the first tensioning notch 121 of the third embedded steel pipe 12; the fourth embedded steel pipe 21 and the fifth embedded steel pipe 22 are sleeved on the steel bar 31;

[0038] The first standard section 1 and the second standard section 2 are provided in plurality and are arranged in staggered superposition;

[0039] The pier cap 4 is internally provided with a sixth embedded steel pipe 41; the sixth embedded steel pipe 41 is vertically arranged, and is provided with a third tensioning notch 411 at the upper end and a second steel pipe socket 111 or a third steel pipe socket 221 connected to the second steel pipe socket 111 at the lower end after penetrating out of the pier cap 4.

[0040] In the installation of the pier column, firstly, the cast-in-place of the pile cap 3 is carried out, and the steel bar 31 and the first embedded steel pipe 32 are embedded in the pile cap 3; the steel bar 31 is provided in plurality, and the first embedded steel pipe 32 is sleeved on the steel bar 31; the grouting nozzle 322 adopts a circular steel pipe, is welded and fixed with the first embedded steel pipe 32, and is sleeved with a bendable hard plastic grouting pipe 35 at the outside; after the completion of the entire pier column tensioning, the grouting pipe 35 is used as a grouting pipeline, and the end thereof extends out of the top surface of the pile cap 3, which can be protected to prevent blockage during construction; the first standard section 1 is arranged on the pile cap 3, the third embedded steel pipe 12 is a pre-stressed hole-forming pipeline, and the bottom is connected with the first steel pipe socket 321; the notch is used for installing an anchorage device during sectional tensioning; the second embedded steel pipe 11 is also connected with the first steel pipe socket 321, and is provided with a first grout inlet 112 at the upper socket, so that the grout in the lower pier column can flow out of the notch overflow hole and then enter the next pier column through the first grout inlet 112; the second standard section 2 is also installed in the same way as the first standard section 1, so that the fourth embedded steel pipe 21 is aligned with the second embedded steel pipe 11, and the fifth embedded steel pipe 22 is aligned with the third embedded steel pipe 12; the first standard section 1 and the second standard section 2 are alternately installed, and in the installation of the pier cap 4, only the sixth embedded steel pipe 41 in the pier cap 4 needs to be inserted into the steel pipe socket of the lower standard section; the overall height of the pier column can be adjusted by the number of the first standard section 1 and the second standard section 2; when the height of the pier column segment prepared additionally is less than the standard section during assembly, the height of the pier column segment prepared additionally is less than the standard section.

[0041] As Figure 4 and Figure 6As shown, the second embedded steel pipe 11, the third embedded steel pipe 12, the fourth embedded steel pipe 21 and the fifth embedded steel pipe 22 are all provided with several. When installing and connecting the first standard section 1 and the second standard section 2, the plurality of second embedded steel pipes 11, the third embedded steel pipes 12, the fourth embedded steel pipes 21 and the fifth embedded steel pipes 22 are used for stability.

[0042] As shown in the drawings, Figure 1 The leveling plate 5 is further included, which is arranged on the top of the bearing platform 3. The leveling plate 5 is used for bearing the first standard section 1, and a plurality of through holes can be arranged on the leveling plate 5 for positioning the first embedded steel pipe 32 and the second embedded steel pipe 11 to improve stability.

[0043] As shown in the drawings, Figure 1 The reinforcing steel bars 31 are fine rolled threaded steel bars, which are spliced in multiple sections and connected by the connecting pieces 8. When arranging the reinforcing steel bars 31, the reinforcing steel bars 31 can be assembled and arranged in multiple sections, which is more convenient in installation.

[0044] As shown in the drawings, Figure 1 The bottom of the first embedded steel pipe 32 is fixed by the lower anchor pad 33 and the lower nut 34. The lower anchor pad 33 is used for expanding the stress area to prevent the concrete from cracking during tensioning.

[0045] As shown in the drawings, Figure 2 Figure 2 The bottom of the second tensioning slot 211 is provided with a slot pad 6, and the lower part of the tensioning slot is connected to the fourth embedded steel pipe 21 below through the grout overflow pipe 7. The second tensioning slot 211 is used for installing the anchorage device during segmented tensioning and mainly consists of the lower slot pad 6 and the slot sidewall. The slot sidewall adopts a circular structure formed by a thin iron sheet and is mainly used for forming the slot during concrete pouring. The slot pad 6 is a thick steel plate with a through hole in the middle and is mainly used for anchoring after tensioning. The grout overflow pipe 7 is arranged in the slot and bypasses the slot pad 6 to be connected to the embedded steel pipe below, which can still meet the grout overflow condition after segment tensioning and is provided with the grout overflow pipe 7 at the top.

[0046] A prefabricated pier column structure construction method, comprising the following construction steps,

[0047] S1, the lower nut 34, the lower anchor pad 33, the reinforcing steel bars 31, the first embedded steel pipe 32 and the grouting pipe 35 are pre-embedded in the bearing platform 3;

[0048] S2, the first standard section 1 is an odd-numbered assembly segment from bottom to top, and the third embedded steel pipe 12 with a tensioning slot and the second embedded steel pipe 11 with a socket are arranged in the concrete structure in a staggered manner; when installing, the second embedded steel pipe 11 is sleeved on the reinforcing steel bars 31, the third embedded steel pipe 12 is sleeved on the adjacent reinforcing steel bars 31 in the bearing platform, and the first standard section 1 is continuously lowered to fall above the top surface of the bearing platform 3;

[0049] S3, the second standard section 2 is the even assembly section from bottom to top, the fourth embedded steel pipe 21 with a tensioning slot and the fifth embedded steel pipe 22 with a socket are arranged in the concrete structure in an interlaced manner; during installation, the fifth embedded steel pipe 22 corresponds to the position of the third embedded steel pipe 12, and the fourth embedded steel pipe 21 corresponds to the position of the second embedded steel pipe 11; the fifth embedded steel pipe 22 is sleeved on the steel bar 31, and the fourth embedded steel pipe 21 is sleeved on the steel bar 31 by falling, and the second standard section 2 is continuously lowered to be above the first standard section 1;

[0050] S4, the first standard section 1 and the second standard section 2 are alternately installed until the pier cap 4 is installed at the height of the pier cap 4, so that the sixth embedded steel pipe 41 is sleeved on the steel bar 31 below, and is lowered to be above the first standard section 1 or the second standard section 2;

[0051] S5, before tensioning each section, verticality re-measurement needs to be performed, and if the section is not perpendicular to the ground, a steel wedge-shaped plate needs to be used for leveling;

[0052] S6, after tensioning of all pier column sections is completed, the section joint with the leveling steel wedge-shaped plate arranged from top to bottom is processed, a hoop corresponding to the size of the pier column is installed at the joint needing to be processed, the top of the hoop is provided with a U-shaped groove and can be used to collect excess slurry, and the epoxy resin mortar is injected from the lower side of the joint.

[0053] During installation of the first standard section 1 and the second standard section 2 in S2 and S3, the upper nut is installed on the steel bar 31 in the tensioning slot, and the bottom of the upper nut is in contact with the slot pad. Then the steel bar 31 is tensioned by using a hydraulic jack, and after tensioning to the designed tensioning force, the upper nut is continuously screwed downward to be attached to the slot pad, and after ensuring that the upper nut cannot be continuously screwed, the jack is started to be depressurized. The steel bars 31 in all tensioning slots at the top of the first standard section 1 and the second standard section 2 are symmetrically and sequentially tensioned.

[0054] In the process of S6, after the epoxy resin mortar is solidified, the hoop is removed, and the joint is polished to ensure the appearance effect.

[0055] In the description of the present application, “connection”, “fixation” can be fixed connection, processing molding, welding, and can also be mechanical connection, and the specific case is understood as the specific meaning of the above terms in the present application.

[0056] In the description of the present application, the terms “center”, “upper”, “lower”, “horizontal”, “inner”, “outer” and the like indicate the orientation or position relationship only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a specific orientation, so it cannot be understood as a limitation on the present application.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions described in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1.A method for constructing a fabricated pier column structure, the fabricated pier column structure comprising a first standard section (1), a second standard section (2), a pile cap (3), and a pier cap (4); the pile cap (3) comprising a steel bar (31) and a first embedded steel pipe (32) embedded in the pile cap (3); the steel bar (31) is vertically provided with a plurality of steel bars, and the upper part of the steel bar (31) extends out of the pile cap (3); the first embedded steel pipe (32) is sleeved outside the steel bar (31), and the upper part of the first embedded steel pipe (32) is provided with a first steel pipe socket (321); the lower part of the first embedded steel pipe (32) is provided with a transverse grouting nozzle (322), and the transverse grouting nozzle (322) extends out of the upper end surface of the pile cap (3) through a grouting pipe (35); the first standard section (1) is internally provided with a second embedded steel pipe (11) and a third embedded steel pipe (12); the second embedded steel pipe (11) is vertically provided, and the upper end of the second embedded steel pipe (11) is provided with a second steel pipe socket (111); the lower end of the second embedded steel pipe (11) is provided with a first grouting inlet (112) after penetrating out of the lower part of the first standard section (1); the third embedded steel pipe (12) is vertically provided, and the upper end of the third embedded steel pipe (12) is provided with a first tensioning slot (121); the lower end of the third embedded steel pipe (12) penetrates out of the first standard section (1); the second embedded steel pipe (11) and the third embedded steel pipe (12) are both connected to the first steel pipe socket (321) of the first embedded steel pipe (32) and are sleeved outside the steel bar (31); the second standard section (2) is internally provided with a fourth embedded steel pipe (21) and a fifth embedded steel pipe (22); the fourth embedded steel pipe (21) is vertically provided, and the upper end of the fourth embedded steel pipe (21) is provided with a second tensioning slot (211); the lower end of the fourth embedded steel pipe (21) is connected to the second steel pipe socket (111) of the second embedded steel pipe (11) after penetrating out of the second standard section (2); the fifth embedded steel pipe (22) is vertically provided, and the upper end of the fifth embedded steel pipe (22) is provided with a third steel pipe socket (221); the lower end of the fifth embedded steel pipe (22) is provided with a second grouting inlet (222) after penetrating out of the lower part of the second standard section (2), and the second grouting inlet (222) is connected to the first tensioning slot (121) of the third embedded steel pipe (12); the fourth embedded steel pipe (21) and the fifth embedded steel pipe (22) are sleeved outside the steel bar (31); the first standard section (1) and the second standard section (2) are provided with a plurality of sections and are arranged in an interlaced and stacked manner; The pier cap (4) has a sixth pre-embedded steel pipe (41) inside; the sixth pre-embedded steel pipe (41) is vertically arranged, with a third tensioning groove (411) at the upper end, and the lower end passes through the pier cap (4) and connects to the second steel pipe socket (111) or the third steel pipe socket (221), characterized in that: the method comprises the following construction steps, S1, embedding the steel bar (31), the first embedded steel pipe (32), and the grouting pipe (35) in the pile cap (3); S2, the first standard section (1) is an odd-numbered assembly section from bottom to top; the third embedded steel pipe (12) with a tensioning slot and the second embedded steel pipe (11) with a socket are interlaced and embedded in the concrete structure; during installation, the second embedded steel pipe (11) is sleeved on the steel bar (31), the third embedded steel pipe (12) is sleeved on the adjacent steel bar (31) in the pile cap, and the first standard section (1) is continuously lowered to fall above the top surface of the pile cap (3). S3, the second standard section (2) is the even assembly section from bottom to top, the fourth embedded steel pipe (21) with tension slot and the fifth embedded steel pipe (22) with socket are staggered embedded in the concrete structure; the fifth embedded steel pipe (22) corresponds to the position of the third embedded steel pipe (12) during installation, the fourth embedded steel pipe (21) corresponds to the position of the second embedded steel pipe (11); the fifth embedded steel pipe (22) is sleeved on the steel bar (31), the fourth embedded steel pipe (21) is sleeved on the steel bar (31) by falling, and the second standard section (2) is continuously lowered to be above the first standard section (1); S4, the first standard section (1) and the second standard section (2) are alternately installed until the pier cap (4) is installed at the elevation of the pier cap (4), the sixth embedded steel pipe (41) is sleeved on the steel bar (31) below, and is lowered to be above the first standard section (1) or the second standard section (2); S5, before tensioning each section, verticality re-measurement is needed, and steel wedge-shaped plates must be used for leveling if the section is not perpendicular to the ground; S6, after all the pier column sections are tensioned, the section joints with leveling steel wedge-shaped plates are processed from top to bottom, the hoops corresponding to the size of the pier column are installed at the joints needing to be processed, the top of the hoop is provided with a U-shaped groove for collecting excess slurry, and the epoxy resin mortar is injected from the lower side of the joint.

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