Concrete construction joint construction method

Abstract

The application discloses a concrete construction joint construction method, which is used for a structure to be poured and comprises the following steps: determining a preset position of a construction joint on the structure to be poured; pouring first concrete and second concrete in sequence at the preset position of the construction joint; wherein, a construction joint is formed between the first concrete and the second concrete; performing waterproof treatment on the construction joint; and performing joint construction on the construction joint to complete the construction of the construction joint. By determining the preset position of the construction joint on the structure to be poured, pouring the first concrete and the second concrete in sequence at the preset position of the construction joint, and performing joint construction after the waterproof treatment on the construction joint, the method avoids the influence of the non-dense joint construction on the construction joint on the concrete strength and waterproof effect, prevents the phenomenon of water seepage of the construction joint, improves the construction quality of the construction joint, and further standardizes the technological process of the interface treatment of the construction joint.

Description

Technical Field

[0001] This invention relates to the field of concrete construction technology for wall construction joints, and more particularly to a method for constructing concrete construction joints. Background Technology

[0002] During the construction of cast-in-place concrete structures, construction joints are formed between the concrete poured in sections due to design requirements or construction needs. The construction joints are located in the weak points of the concrete construction, and inadequate interface treatment can easily lead to loose joints and water leakage.

[0003] Therefore, there is an urgent need for a construction method for concrete construction joints, and the process of treating the interface of construction joints should be further standardized. Summary of the Invention

[0004] The main objective of this invention is to provide a method for constructing concrete construction joints, aiming to solve the technical problem that in the prior art, due to design requirements or construction needs, construction joints are formed between the concrete poured in stages. The construction joints are located in weak points of the concrete construction, and inadequate interface treatment can easily lead to loose joints and water leakage. Therefore, there is an urgent need for a method for constructing concrete construction joints to further standardize the process of interface treatment for construction joints.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This invention provides a method for constructing concrete construction joints, used in structures to be poured, the method comprising:

[0007] Determine the preset location of the construction joint on the structure to be poured;

[0008] At the predetermined location of the construction joint, the first concrete and the second concrete are poured in segments and sequentially; wherein, a construction joint is formed between the first concrete and the second concrete.

[0009] Waterproofing treatment should be applied to the construction joints;

[0010] The construction joint is then joined together to complete the construction of the construction joint.

[0011] Optionally, in the above-described method for constructing concrete construction joints, the step of determining the preset location of the construction joint on the structure to be poured includes:

[0012] Based on the shear force condition of the structure to be poured, lines are laid out on the structure to determine the preset position of the construction joint.

[0013] Optionally, in the above-mentioned concrete construction joint construction method, the structure to be poured includes a base slab, and the step of determining the preset position of the construction joint on the structure to be poured according to the construction design requirements includes:

[0014] According to the preset spacing, the preset position of the construction joint is marked on the base plate;

[0015] The preset spacing is greater than or equal to 0.3cm.

[0016] Optionally, in the above-described method for constructing concrete construction joints, the step of pouring the first and second concrete in segments and sequentially at the predetermined location of the construction joint includes:

[0017] According to the preset position of the construction joint, the base plate is used to support the structure to be poured, forming a box-shaped template to be poured;

[0018] The first concrete and the second concrete are poured into the box-shaped formwork in sections and sequentially to form the construction joint between the first concrete and the second concrete.

[0019] Optionally, in the above-described method for constructing concrete construction joints, before the step of waterproofing the construction joint, the method further includes:

[0020] Remove the box-shaped template;

[0021] According to the preset position of the construction joint, the surfaces of the solidified first concrete and the solidified second concrete are roughened to form a waterstop to be constructed.

[0022] Optionally, in the above-described method for constructing concrete construction joints, the step of waterproofing the construction joint includes:

[0023] The construction joint is waterproofed using grouting pipes, water-stopping adhesive, and waterproof coating.

[0024] Apply an interface agent to the waterstop strip to be constructed.

[0025] Optionally, in the above-described concrete construction joint construction method, the step of performing joint construction to complete the construction of the construction joint includes:

[0026] Obtain the compressive strength of the first concrete after it has solidified;

[0027] Determine whether the compressive strength of the first concrete is greater than or equal to 2.5 MPa;

[0028] If so, pour the third section of concrete into the construction joint to perform joint construction.

[0029] Complete the construction of the construction joint.

[0030] Optionally, in the above-described method for constructing concrete construction joints, before the step of pouring a third section of concrete into the construction joint to perform joint construction, the method further includes:

[0031] Obtain the compressive strength of the second concrete after it has solidified;

[0032] Determine whether the compressive strength of the second concrete is greater than or equal to 2.5 MPa.

[0033] Optionally, in the above-described method for constructing concrete construction joints, before the step of performing joint construction to complete the construction of the construction joint, the method further includes:

[0034] A layer of reduced-aggregate cement mortar is laid on the construction joint.

[0035] Optionally, in the above-described method for constructing concrete construction joints, before the step of performing joint construction to complete the construction of the construction joint, the method further includes:

[0036] The construction joint is grouted according to the preset thickness;

[0037] The preset thickness is less than or equal to 3cm.

[0038] The above-described one or more technical solutions provided by this invention can have the following advantages or at least achieve the following technical effects:

[0039] This invention proposes a method for constructing concrete construction joints. The method involves determining the predetermined location of the construction joint on the structure to be poured. At the predetermined location of the construction joint, the first and second concrete sections are poured sequentially. The construction joint is then waterproofed before joint construction. This method avoids affecting the concrete strength and waterproofing effect due to loose joints, prevents water leakage at the construction joint, improves the construction quality of the construction joint, and further standardizes the process for treating the interface of the construction joint. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1This is a schematic flowchart of the concrete construction joint construction method of the present invention;

[0042] Figure 2 for Figure 1 Detailed flowchart of step S200;

[0043] Figure 3 for Figure 1 Detailed flowchart of step S300;

[0044] Figure 4 for Figure 1 A detailed flowchart of step S400.

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0047] It should be noted that in the embodiments of the present invention, all directional indications (such as up, down, left, right, front, back, etc.) are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0048] In this invention, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element. Furthermore, the meaning of "and / or" throughout the text includes three parallel options; for example, "A and / or B" includes option A, option B, or options where both A and B are satisfied.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements.

[0050] In this invention, if there are descriptions involving "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0051] In this invention, the use of suffixes such as "module," "component," "part," "unit," or "unit" to denote elements is solely for the purpose of illustrative purposes and has no specific meaning in itself. Therefore, "module," "part," or "unit" can be used interchangeably.

[0052] For those skilled in the art, the specific meanings of the above terms in this invention can be understood according to the specific circumstances. Furthermore, the technical solutions of the various embodiments can be combined with each other; however, this is based on the premise that those skilled in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0053] The inventive concept of the present invention will be further explained below with reference to some specific embodiments.

[0054] This invention proposes a method for constructing concrete construction joints.

[0055] Reference Figure 1 , Figure 1 This is a schematic flowchart of the concrete construction joint construction method of the present invention.

[0056] In one embodiment of the present invention, such as Figure 1 As shown, a method for constructing concrete construction joints is used in structures to be poured. The method includes the following steps:

[0057] Step S100: Determine the preset position of the construction joint on the structure to be poured;

[0058] Step S200: At the predetermined location of the construction joint, pour the first concrete and the second concrete in sections and sequentially; wherein, a construction joint is formed between the first concrete and the second concrete.

[0059] Step S300: Waterproof the construction joint;

[0060] Step S400: Perform joint construction on the construction joint to complete the construction of the construction joint.

[0061] For ease of understanding, a specific implementation method is shown below:

[0062] Construction joint placement: The location of construction joints should be determined by marking out lines before concrete pouring, and should preferably be placed in areas where the structure is subject to less shear force and is easy to construct, such as walls. Considering the overall formwork, 0.3cm should be taken from the bottom plate.

[0063] Treatment measures for construction joints: After demolding, roughen the concrete surface of the construction joint, remove the laitance, and use a chisel to remove the soft soil layer outside the straight joint to expose the aggregate. Clean it thoroughly to ensure the quality of the concrete joint.

[0064] Waterproofing details of construction joints: The construction joints are constructed using grouting pipes, two layers of waterproof sealant, and cement-based penetrating crystalline waterproof coating. After roughening the surface of the construction joints, the waterstop is cleaned and an interface agent is applied.

[0065] Concrete pouring at construction joints: When continuing to pour concrete at construction joints, the compressive strength of the already poured concrete should not be less than 2.5 MPa; before pouring concrete, it is advisable to lay a layer of cement mortar with the same composition as the concrete at the construction joint, with the mortar thickness controlled within 3 cm. The mortar application should not be done too early, preferably about five minutes before the concrete pouring; the concrete should be carefully compacted to ensure a tight bond between the old and new concrete.

[0066] Precautions during concrete pouring: On-site quality inspectors and night shift personnel should directly coordinate the arrival time, departure speed, and route of concrete mixer trucks to ensure timely supply and continuous pouring without waiting for or delaying trucks. During concrete pouring, a dedicated person should monitor the formwork. If deformation or displacement of the formwork is detected, pouring should be stopped immediately, and repairs made before the poured concrete sets. After pouring and before solidification, promptly wipe away any exposed grout or loose material with a damp cloth (prepare a bucket of water and use a cloth dipped in water to clean). Use the same method to remove any concrete grout adhering to the reinforcing steel. Remove any loose grout (small pieces of sheet metal) before the concrete sets. Before final setting, perform surface finishing: use a trowel (or a wooden trowel for rough surfaces) to smooth and flatten non-structural surface cracks (caused by concrete settlement and drying shrinkage) (then cover and cure).

[0067] It should be noted that a construction joint in concrete refers to the joint formed between concrete poured in stages due to design requirements or construction needs. A construction joint is not a real "seam"; it is simply a bonding surface between the first poured concrete and the later poured concrete, which exists because the first poured concrete has exceeded its initial setting time. This bonding surface is called a concrete construction joint.

[0068] It is worth noting that in this embodiment and other embodiments, the construction joint is a construction joint applied to the poured wall.

[0069] The technical solution of this invention determines the preset position of the construction joint on the structure to be poured; at the preset position of the construction joint, after pouring the first concrete and the second concrete in sections and sequentially, the construction joint is waterproofed before the joint construction is carried out. This avoids the impact on the concrete strength and waterproofing effect due to the joint not being tight, prevents water leakage from the construction joint, improves the construction quality of the construction joint, and the process of interface treatment of the construction joint should be further standardized.

[0070] In one embodiment, to improve the forming quality of the construction joint, the step of determining the preset position of the construction joint on the structure to be poured includes:

[0071] Step S110: Based on the shear force condition of the structure to be poured, lay out lines on the structure to be poured to determine the preset position of the construction joint on the structure to be poured.

[0072] In one embodiment, to improve the forming quality of the construction joint, the structure to be poured includes a base plate, and the step of determining the preset position of the construction joint on the structure to be poured according to the construction design requirements includes:

[0073] Step S120: Mark the preset position of the construction joint on the base plate according to the preset spacing;

[0074] The preset spacing is greater than or equal to 0.3cm.

[0075] Continue to refer to Figure 1 and refer to Figure 2 , Figure 2 for Figure 1 A detailed flowchart of step S200.

[0076] In one embodiment, such as Figure 1 and Figure 2 As shown, the step of pouring the first and second concrete in segments and sequentially at the predetermined location of the construction joint includes:

[0077] Step S210: According to the preset position of the construction joint, the base plate is used to support the structure to be poured to form a box-shaped template to be poured.

[0078] Step S220: The first concrete and the second concrete are poured into the box-shaped formwork in sections and sequentially to form the construction joint between the first concrete and the second concrete.

[0079] Understandably, if deformation or displacement of the formwork is discovered, pouring should be stopped immediately, and the formwork should be repaired before the poured concrete sets.

[0080] In one embodiment, prior to the step of waterproofing the construction joint, the concrete construction joint construction method further includes the following steps:

[0081] Step A100: Remove the box-shaped template;

[0082] Step A200: According to the preset position of the construction joint, roughen the surfaces of the solidified first concrete and the solidified second concrete to form a waterstop to be constructed.

[0083] Specifically, after demolding, the concrete surface of the construction joint is roughened to remove laitance. The soft soil layer outside the straight joint is shaved off to expose the aggregate, and the area is cleaned thoroughly to ensure the quality of the concrete joint.

[0084] Continue to refer to Figure 1 and Figure 2 and refer to Figure 3 , Figure 3 for Figure 1 A detailed flowchart of step S300.

[0085] In one embodiment, such as Figure 1 , Figure 2 and Figure 3 As shown, the steps for waterproofing the construction joint include:

[0086] Step S310: Waterproof the construction joint using grouting pipes, water-stopping adhesive, and waterproof coating;

[0087] Step S320: Apply an interface agent to the waterstop strip to be constructed.

[0088] Specifically, the waterproof coating is a cement-based penetrating crystalline waterproof coating. This type of coating is a powdered, rigid waterproof material made from special cement, quartz sand, and other base materials, infused with various active chemical substances. Upon contact with water, the active chemical substances in the material penetrate into the concrete through the carrier water, forming water-insoluble crystals that block capillary pores, thus making the concrete dense and waterproof. It is commonly used for interface treatment during concrete construction.

[0089] Continue to refer to Figure 1 , Figure 2 and Figure 3 and refer to Figure 4 , Figure 4 for Figure 1 A detailed flowchart of step S400.

[0090] In one embodiment, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, to improve the forming quality of the construction joint, the steps of performing jointing construction on the construction joint to complete the construction of the construction joint include:

[0091] Step S410: Obtain the compressive strength of the first concrete after solidification;

[0092] Step S420: Determine whether the compressive strength of the first concrete is greater than or equal to 2.5 MPa;

[0093] Step S430: If so, pour the third section of concrete into the construction joint to perform joint construction on the construction joint;

[0094] Step S440: Complete the construction of the construction joint.

[0095] In one embodiment, prior to the step of pouring a third section of concrete into the construction joint to perform joint construction, in order to improve the forming quality of the construction joint, the concrete construction joint construction method further includes the following steps:

[0096] Step A410: Obtain the compressive strength of the solidified second concrete;

[0097] Step A420: Determine whether the compressive strength of the second concrete is greater than or equal to 2.5 MPa.

[0098] In one embodiment, before the step of performing joint construction on the construction joint to complete the construction of the construction joint, the concrete construction joint construction method further includes the following steps:

[0099] Step A500: Lay a layer of reduced-aggregate cement mortar onto the construction joint.

[0100] Specifically, before pouring concrete, it is advisable to lay a layer of cement mortar with the same composition as the concrete at the construction joint. After the concrete is poured but before it sets, wipe away any exposed mortar or loose debris with a damp cloth (prepare a bucket of water and use a cloth to wipe it with water in the bucket). Use the same method to remove any concrete slurry adhering to the reinforcing steel. The laitance after pouring should be scraped off (with small pieces of iron) before the concrete sets. Before the concrete sets, perform surface finishing treatment and use a trowel (or a wooden trowel for rough surfaces) to repair and smooth out any cracks on the non-structural surfaces (caused by concrete settlement and drying shrinkage) (and then cover and cure).

[0101] In one embodiment, before the step of performing joint construction on the construction joint to complete the construction of the construction joint, the concrete construction joint construction method further includes the following steps:

[0102] Step A600: Perform grouting treatment on the construction joint according to the preset thickness;

[0103] The preset thickness is less than or equal to 3cm.

[0104] Specifically, grouting must be performed before pouring concrete into the wall. Grouting should ideally be done about five minutes before concrete pouring (if the mortar remains for too long, the mortar used for grouting will easily lose moisture, resulting in low mortar flowability and an inability to achieve a full grouting effect, leading to poor concrete contact at the construction joint). When using mortar with the same mix proportion but reduced aggregate, a pipe-lubricating mortar can be used when pouring with a pump truck. After lubricating the pipe, it should be poured evenly into the wall, with a thickness controlled within 3cm. Pouring concrete without grouting is strictly prohibited (too thin a mortar will not fully fill the gaps between aggregates at the construction joint, while too thick a mortar will reduce the aggregate ratio in the grouting area, creating a weak zone). The grouting thickness should be controlled within 3cm, and the grouting process should not be too early, ideally about five minutes before concrete pouring. If the mortar remains for too long, the mortar used for grouting will easily lose moisture, resulting in low mortar flowability and an inability to achieve a full grouting effect, leading to poor concrete contact at the construction joint.

[0105] It should be noted that the sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments. The above embodiments are only optional embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made under the inventive concept of the present invention using the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are all included within the patent protection scope of the present invention.

Claims

1. A method of constructing a concrete construction joint, characterised in that, The method for a structure to be cast comprises: determining a preset position of a construction joint on the structure to be cast; casting a first concrete and a second concrete in sections and in sequence at the preset position of the construction joint, wherein a construction joint is formed between the first concrete and the second concrete; waterproofing the construction joint; carrying out joint construction on the construction joint to complete construction of the construction joint; wherein the step of determining the preset position of the construction joint on the structure to be cast comprises: performing a line setting on the structure to be cast according to a shearing force condition of the structure to be cast to determine the preset position of the construction joint on the structure to be cast; the structure to be cast comprises a bottom plate, and the step of determining the preset position of the construction joint on the structure to be cast comprises: marking the preset position of the construction joint on the bottom plate according to a preset interval; wherein the preset interval is greater than or equal to 0.3 cm; the step of casting the first concrete and the second concrete in sections and in sequence at the preset position of the construction joint comprises: forming a box-shaped formwork to be cast on the structure to be cast by using the bottom plate according to the preset position of the construction joint; casting the first concrete and the second concrete in sections and in sequence into the box-shaped formwork to form the construction joint between the first concrete and the second concrete; the step of carrying out joint construction on the construction joint to complete construction of the construction joint comprises: obtaining a compressive strength of the solidified first concrete; judging whether the compressive strength of the first concrete is greater than or equal to 2.5 MPa; if yes, casting a third segment of concrete into the construction joint to carry out joint construction on the construction joint; completing construction of the construction joint; before the step of casting the third segment of concrete into the construction joint to carry out joint construction on the construction joint if yes, the method further comprises: obtaining a compressive strength of the solidified second concrete; judging whether the compressive strength of the second concrete is greater than or equal to 2.5 MPa.

2. The method of constructing a concrete construction joint according to claim 1, wherein, before the step of waterproofing the construction joint, the method further comprises: removing the box-shaped formwork; chiseling the surface of the solidified first concrete and the solidified second concrete according to the preset position of the construction joint to form a construction joint to be constructed.

3. The method of constructing a concrete construction joint according to claim 2, wherein, the step of waterproofing the construction joint comprises: waterproofing the construction joint by using a grouting pipe, a waterproof glue and a waterproof coating; applying an interface agent to the construction joint to be constructed.

4. The method of constructing a concrete construction joint according to claim 1, wherein, before the step of carrying out joint construction on the construction joint to complete construction of the construction joint, the method further comprises: laying a layer of reduced stone cement mortar on the construction joint.

5. The method of constructing a concrete construction joint according to claim 1, wherein, before the step of carrying out joint construction on the construction joint to complete construction of the construction joint, the method further comprises: carrying out grouting treatment on the construction joint according to a preset thickness; wherein the preset thickness is less than or equal to 3 cm.

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