A method for preventing and controlling cracking of the joint surface between a vase pier and a cap beam

Abstract

The invention discloses a method for preventing cracks on the joint surface of a vase pier column and a cap beam, comprising: installing a pier column body template and a pier column vase section template, pouring concrete to form the pier column body and the pier column vase section; building a cap beam support on both sides of the pier column body and the pier column vase section, installing the cap beam vase section template on the cap beam support, the cap beam vase section template length extends to the pier column vase section, the bottom fits the pier column vase section, connects the pier column vase section line, and supports the weak section of the edge of the pier column vase section; installing the cap beam template on the cap beam support, fixing the cap beam template and the cap beam vase section template, and then integrally pouring concrete to form the cap beam vase section and the cap beam. Compared with the vase section cast once in the pier column construction, the pier column vase section produced by the method of the invention is more complete, does not need to be decorated in the later stage, and the probability of cracks with the cap beam vase section is also greatly reduced, that is, the quality problem is solved and the aesthetics is improved.

Description

Technical Field

[0001] The invention relates to the technical field of crack prevention methods, and in particular to a crack prevention method for a joint surface between a vase pier and a cap beam. Background Art

[0002] With the development of my country's infrastructure construction, beautiful vase piers are increasingly used in bridge construction, especially urban viaducts, highway viaducts, etc. The design of vase piers can not only meet the clearance requirements at the bottom of the bridge, but also increase the aesthetics of the building. At present, the construction of vase piers generally adopts one-time casting with the pier column. However, during the process of removing the mold of the pier column and constructing the cap beam, the end of the vase section is prone to quality problems such as corner collapse, end sinking, and cracks on the joint surface with the cap beam due to its small thickness and the need to bear the load of steel bars, concrete, etc., which will also affect the appearance and lead to rework and decoration. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method for preventing and controlling cracks on the joint surface between a vase pier and a cap beam, which can not only effectively avoid the problem of corner collapse in the pier vase section during the pier column demolding process, but also greatly reduce the problem of cracks on the joint surface between the pier vase section and the cap beam vase section, thereby improving the structural quality and aesthetics.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A method for preventing and controlling cracking of a joint surface between a vase pier and a cap beam, the method comprising:

[0006] Install the pier column shaft formwork and the pier column vase section formwork, and pour concrete to form the pier column shaft and the pier column vase section;

[0007] A cap beam support is built on both sides of the pier column body and the pier column vase section, and a cap beam vase section template is installed on the cap beam support. The length of the cap beam vase section template extends to the pier column vase section, and the bottom fits the pier column vase section, follows the line shape of the pier column vase section, and supports the weak section at the edge of the pier column vase section at the same time;

[0008] The cap beam formwork is installed on the cap beam support, the cap beam formwork and the cap beam vase section formwork are fixedly connected, and then concrete is poured as a whole to form the cap beam vase section and the cap beam.

[0009] Furthermore, when installing the pier column vase section template, a comb plate is added at a set position away from the end of the pier column vase section template, and when pouring concrete, it is only poured to the position of the comb plate.

[0010] Furthermore, the bottom of the cap beam vase section template is supported on the cap beam bracket by a distribution beam assembly.

[0011] Furthermore, the cap beam support includes steel pipe piles distributed on both sides of the pier column shaft and the pier column vase section, and the top of the steel pipe piles is sequentially installed with a sand box, a load transfer steel and a Bailey beam.

[0012] Further, the distribution beam assembly includes a first distribution beam, a second distribution beam and a third distribution beam;

[0013] The bottom of the cap beam vase section template is supported on the cap beam support by a distribution beam assembly, specifically comprising:

[0014] The first distribution beam is horizontally erected on the Bailey beams on both sides of the pier column shaft and the pier column vase section, and a first leveling wood is laid on the first distribution beam to support the bottom side of the cap beam vase section template;

[0015] A second distribution beam is arranged on the first distribution beam, and a second leveling wood is laid on the second distribution beam to support the middle side of the cap beam vase section template;

[0016] A third distribution beam is arranged on the second distribution beam, and a third leveling wood is laid on the third distribution beam to support the top side of the cap beam vase section template.

[0017] Further, a cap beam template is installed on the cap beam support, the cap beam template and the cap beam vase section template are fixedly connected, and then concrete is integrally poured to form the cap beam vase section and the cap beam, which specifically includes:

[0018] Install the fourth distribution beam on the Bailey beams on both sides of the pier column shaft and the pier vase section, and lay the fourth leveling wood on the fourth distribution beam;

[0019] After the fourth leveling wood is laid, the cap beam bottom formwork is installed, and the cap beam bottom formwork and the cap beam vase section are connected into a whole through fasteners;

[0020] After the installation of the cap beam bottom formwork is completed, the cap beam skeleton reinforcement is installed. After the installation of the cap beam skeleton reinforcement is completed, the cap beam side formwork is installed;

[0021] After the cap beam side formwork is installed, the cap beam bottom formwork, the cap beam side formwork and the cap beam vase section formwork are connected to form an integral formwork, and concrete is poured on the integral formwork to form the cap beam vase section and the cap beam.

[0022] Furthermore, the method further comprises:

[0023] Before installing the cap beam formwork on the cap beam support, the top and end of the pier column vase section shall be roughened to remove the cement slurry and loose layers;

[0024] Chisel until the aggregate is visible in the concrete, and rinse the chiseled contact surface clean with a high-pressure water gun.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] Compared with the vase section cast in one go during the pier construction, the pier vase section produced by the method of the present invention is more complete, does not need to be decorated in the later stage, and the probability of cracks with the cap beam vase section is also greatly reduced, which solves the quality problem and improves the aesthetics;

[0027] Compared with the construction technology, when constructing the cap beam, it is ensured that no safety accidents caused by leakage due to concrete damage or sinking will occur at the weakest part of the vase section of the cap beam, which is equivalent to adding safety measures. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a flowchart of the method for preventing and controlling cracking of the joint surface between the vase pier column and the cap beam of the present invention;

[0029] Figure 2 It is a schematic diagram of the division of the pier column body, the pier column vase section and the cap beam vase section in the method for preventing and controlling cracks on the joint surface of the vase pier column and the cap beam of the present invention;

[0030] Figure 3 It is a front view schematic diagram of the installation structure of the method for preventing and controlling cracking of the joint surface between the vase pier column and the cap beam of the present invention;

[0031] Figure 4 for Figure 3 Schematic diagram of the structure viewed from another perspective.

[0032] Figure 5 It is a side view schematic diagram of the installation structure of the method for preventing and controlling cracking of the joint surface between the vase pier column and the cap beam of the present invention;

[0033] Figure 6 It is a top view schematic diagram of the installation structure of the method for preventing and controlling cracking of the joint surface between the vase pier and the cap beam of the present invention.

[0034] In the figure: 10, pier column body; 20, pier column vase section; 30, cap beam vase section template; 40, cap beam vase section; 50, cap beam; 61, first distribution beam; 62, second distribution beam; 63, third distribution beam; 64, first leveling wood; 65, second leveling wood; 66, third leveling wood; 71, steel pipe pile; 72, sand box; 73, load transfer steel; 74, Bailey beam. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0036] like Figure 1-Figure 6 A method for preventing and controlling cracking of the joint surface between a vase pier and a cap beam is shown, the method comprising:

[0037] S1, installing the pier column shaft formwork and the pier column vase section formwork, and pouring concrete to form the pier column shaft 10 and the pier column vase section 20;

[0038] S2, build a cap beam support on both sides of the pier column body 10 and the pier column vase section 20, install the cap beam vase section template 30 on the cap beam support, the cap beam vase section template 30 extends to the pier column vase section 20, the bottom of the cap beam vase section template 30 fits the pier column vase section 20, follows the line shape of the pier column vase section 20, and supports the weak edge section of the pier column vase section 20;

[0039] S3, installing the cap beam template on the cap beam support, fixing the cap beam template and the cap beam vase segment template 30 together, and then integrally pouring concrete to form the cap beam vase segment 40 and the cap beam 50.

[0040] As a preferred implementation, in S1, specifically includes:

[0041] S11, when installing the pier column vase section template, the radius of the pier column vase section 20 of this project is 200cm, then add a comb plate 76cm away from the end of the pier column vase section template to ensure that the concrete thickness of the end of the pier column vase section 20 is 15cm;

[0042] S12, when pouring concrete, pour only to the comb plate position.

[0043] As a preferred embodiment, in S2, the bottom of the cap beam vase segment template 30 is supported by a distribution beam assembly on the cap beam support; wherein the distribution beam assembly includes a first distribution beam 61, a second distribution beam 62 and a third distribution beam 63; wherein the cap beam support includes a plurality of distribution beams distributed on both sides of the pier column body and the pier column vase segment. Steel pipe pile 71, the top of which is successively installed with sand box 72, load transfer steel 73 (double-jointed I35 I-beam) and Bailey beam 74, the sand box 72 is used for later removal of the cap beam support, the double-jointed I35 I-beam is used to increase the load-bearing area and transfer the load, and the Bailey beam 74 is used to overlap the distribution beam assembly.

[0044] Further preferably, in S2, the bottom of the cap beam vase segment template 30 is supported on the cap beam support by a distribution beam assembly, specifically comprising:

[0045] S21, horizontally erecting the first distribution beam 61 on the Bailey beams 74 on both sides of the pier column shaft 10 and the pier column vase section 20, and laying a first leveling wood 64 on the first distribution beam 61 to support the bottom side of the cap beam vase section template 30;

[0046] S22, a second distribution beam 62 is arranged on the first distribution beam 61, and a second leveling wood 65 is laid on the second distribution beam 62 to support the middle side of the cap beam vase section template 30;

[0047] S23 , a third distribution beam 63 is arranged on the second distribution beam 62 , and a third leveling wood 66 is laid on the third distribution beam 63 to support the top side of the cap beam vase segment template 30 .

[0048] Further preferably, the first distribution beam 61 uses three parallel double I10 I-beams, double I18 I-beams and double I25b I-beams, the second distribution beam 62 uses I10 I-beams, and the third distribution beam 63 uses I18 I-beams. A first leveling wood is laid on the double I10 I-beam to support the bottom side of the cap beam vase section template 30, and I10 I-beams are arranged on the double I18 I-beams and the double I25b I-beams.

[0049] As a preferred implementation, in S3, specifically including:

[0050] S31, roughening the top and end of the pier column vase section 20, removing cement slurry and loose layers, roughening until the concrete aggregate is visible, and washing the roughened contact surface with a high-pressure water gun to ensure the joint quality of the joint surface between the pier column vase section 20 and the cap beam vase section 40, and the top of the pier column vase section 20 and the bottom of the cap beam 50;

[0051] S32, installing a fourth distribution beam on the Bailey beam 74 on both sides of the pier column shaft 10 and the pier vase section 20, and laying a fourth leveling wood on the fourth distribution beam;

[0052] S33, after the fourth leveling wood is laid, the cap beam bottom mold is installed. The cap beam bottom mold and the cap beam vase section template 30 are provided with mounting holes, and the two are connected as a whole by fasteners (bolts);

[0053] S34, after the cap beam bottom formwork is installed, the cap beam skeleton reinforcement is installed, and after the cap beam skeleton reinforcement is installed, the cap beam side formwork is installed;

[0054] S35, after the cap beam side formwork is installed, the cap beam bottom formwork, the cap beam side formwork and the cap beam vase section formwork 30 are connected to form an integral formwork, and concrete is poured into the integral formwork to form the cap beam vase section 40 and the cap beam 50.

[0055] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for preventing cracking of the joint surface between a vase pier and a cap beam, characterized in that: The method comprises: Install the pier column shaft formwork and the pier column vase section formwork, and pour concrete to form the pier column shaft and the pier column vase section; A cap beam support is built on both sides of the pier column body and the pier column vase section, and a cap beam vase section template is installed on the cap beam support. The length of the cap beam vase section template extends to the pier column vase section, and the bottom fits the pier column vase section, follows the line shape of the pier column vase section, and supports the weak section at the edge of the pier column vase section at the same time; Install the cap beam template on the cap beam support, fix the cap beam template and the cap beam vase section template together, and then integrally cast concrete to form the cap beam vase section and the cap beam; Wherein, the bottom of the cap beam vase section template is supported by the distribution beam assembly on the cap beam bracket; The cap beam support comprises steel pipe piles distributed on both sides of the pier column shaft and the pier column vase section, and a sand box, a load transfer steel and a Bailey beam are sequentially installed on the top of the steel pipe piles; The distribution beam assembly includes a first distribution beam, a second distribution beam and a third distribution beam; The bottom of the cap beam vase section template is supported on the cap beam support by a distribution beam assembly, specifically comprising: The first distribution beam is horizontally erected on the Bailey beams on both sides of the pier column shaft and the pier column vase section, and a first leveling wood is laid on the first distribution beam to support the bottom side of the cap beam vase section template; A second distribution beam is arranged on the first distribution beam, and a second leveling wood is laid on the second distribution beam to support the middle side of the cap beam vase section template; A third distribution beam is arranged on the second distribution beam, and a third leveling wood is laid on the third distribution beam to support the top side of the cap beam vase section template; Specifically, when installing the pier column vase section template, a comb plate is added at a set position away from the end of the pier column vase section template, and when pouring concrete, it is only poured to the position of the comb plate.

2. The method for preventing cracking of the joint surface between the vase pier and the cap beam according to claim 1, characterized in that: The cap beam template is installed on the cap beam support, the cap beam template and the cap beam vase section template are fixedly connected, and then concrete is poured as a whole to form the cap beam vase section and the cap beam, which specifically includes: Install the fourth distribution beam on the Bailey beams on both sides of the pier column shaft and the pier vase section, and lay the fourth leveling wood on the fourth distribution beam; After the fourth leveling wood is laid, the cap beam bottom formwork is installed, and the cap beam bottom formwork and the cap beam vase section are connected into a whole through fasteners; After the installation of the cap beam bottom formwork is completed, the cap beam skeleton reinforcement is installed. After the installation of the cap beam skeleton reinforcement is completed, the cap beam side formwork is installed; After the cap beam side formwork is installed, the cap beam bottom formwork, the cap beam side formwork and the cap beam vase section formwork are connected to form an integral formwork, and concrete is poured on the integral formwork to form the cap beam vase section and the cap beam.

3. The method for preventing cracking of the joint surface between the vase pier and the cap beam according to claim 1, characterized in that: Before installing the cap beam formwork on the cap beam support, the top and end of the pier column vase section shall be roughened to remove the cement slurry and loose layers; Chisel until the aggregate is visible in the concrete, and rinse the chiseled contact surface clean with a high-pressure water gun.

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