CN115726597A - Detachable and recyclable column concrete replacement supporting method - Google Patents

Abstract

A detachable recycled column concrete replacement supporting method comprises the steps of 1) determining the stress of a to-be-replaced part, and determining the number of layers of required supporting steel beams; 2) Mounting upper and lower supporting steel beams and mounting small upright posts; 3) Installing a supporting steel column, and simultaneously installing a lower end steel base plate and an upper end steel base plate to be connected with an upper supporting steel beam and a lower supporting steel beam; 4) Installing section steel for supporting the frame beam; 5) Installing profile steel for supporting and placing a jack; 6) The jack applies force to the profile steel for the supporting jack; 7) At the moment, the steel column is separated from the lower layer steel beam, and the middle gap is filled with grouting material or structural adhesive. After the jack is disassembled, the pressure force transmission path of the upper-layer column is converted into a counter-pulling screw and a small upright column, an upper-layer supporting steel beam, a steel column, a lower-layer supporting steel beam, a counter-pulling screw and a small upright column, and finally the pressure force transmission path is transmitted to the lower-layer column. Meanwhile, the load of the concrete beam is also transferred to the steel column through the supporting beam by using the section steel. The stress of the column to be replaced is released, and the residual stress and the deformation of the reinforcing steel bar are effectively prevented.

Description

Translated fromChinese

一种可拆卸循环利用柱混凝土置换支撑方法A detachable recycling column concrete replacement support method

技术领域technical field

本发明涉及建筑施工技术领域，特别涉及一种可拆卸循环利用柱混凝土置换支撑方法。The invention relates to the technical field of building construction, in particular to a concrete replacement support method for detachable and recycled columns.

背景技术Background technique

混凝土结构是我国应用范围最为广泛的的结构形式，混凝土具有稳定性好、强度高、经济可靠、使用寿命长的特点。但是因混凝土在生产过程中影响其质量的因素很多，比如混凝土配合比、沙子氯离子含量、水泥安定性、添加剂质量等等；同时施工过程中养护不到位、拆模过早等等也影响其强度。因混凝土质量不合格需要对原柱进行加固。加固的方法主要有粘贴碳纤维布、外包角钢、增大截面，这些方法均影响柱的外观及截面，其适用性受到限制。Concrete structure is the most widely used structural form in my country. Concrete has the characteristics of good stability, high strength, economic reliability and long service life. However, there are many factors that affect the quality of concrete during the production process, such as concrete mix ratio, sand chloride ion content, cement stability, additive quality, etc.; at the same time, insufficient maintenance during construction, premature removal of formwork, etc. also affect its quality. strength. The original column needs to be reinforced due to unqualified concrete quality. Reinforcement methods mainly include sticking carbon fiber cloth, outsourcing angle steel, and enlarging the section. These methods all affect the appearance and section of the column, and their applicability is limited.

置换混凝土法加固柱可以保持外观尺寸，在混凝土柱加固时被广泛使用，但是由于房屋已经建成为既有建筑，荷载已经产生，凿除混凝土时必须考虑安全性，凿除前对柱进行支撑是十分必要的。传统的支撑方法造价高，远比置换混凝土本身造价高得多；施工难度大，工期长；支撑不可重复利用，材料浪费大；不能有效解决混凝土应力释放及钢筋变形大等问题，钢筋要重新绑扎，造成浪费。The replacement concrete method can maintain the appearance size and is widely used in the reinforcement of concrete columns. However, since the house has been built as an existing building and the load has already occurred, safety must be considered when removing the concrete. It is necessary to support the column before removing the concrete. very necessary. The traditional support method is expensive, much higher than the cost of replacing the concrete itself; the construction is difficult and the construction period is long; the support cannot be reused, and the waste of materials is large; it cannot effectively solve the problems of concrete stress release and large deformation of the steel bar, and the steel bar needs to be re-bound. , causing waste.

因此亟需研发一种安全可靠可重复使用的柱混凝土置换用支撑。该支撑首先应保证绝对安全，不能产生变形，避免梁板混凝土产生裂缝；同时因荷载已经施加，柱及其内部钢筋已经产生应变，对置换区段的柱应进行应力释放，保证置换后的混凝土有效传力。Therefore, there is an urgent need to develop a safe, reliable and reusable column concrete replacement support. First of all, the support should be absolutely safe, without deformation, and to avoid cracks in the beam-slab concrete; at the same time, because the load has been applied, the column and its internal steel bars have been strained, and the columns in the replacement section should be stress-released to ensure that the concrete after replacement Effective power transmission.

发明内容Contents of the invention

为了解决以上问题，提出一种可拆卸循环利用柱混凝土置换支撑方法。，该支撑系统可以拆卸、可循环再利用。该支撑系统可以保证保证置换部位混凝土凿除后结构的安全；凿除前对支撑预顶，混凝土及钢筋应力进行释放，避免凿除后钢筋产生变形；保证混凝土浇筑完成，支撑拆除后钢筋可以继续受力，避免应力滞后。In order to solve the above problems, a detachable recycling column concrete replacement support method is proposed. , the supporting system can be disassembled and recycled. The support system can ensure the safety of the structure after the concrete is chiseled out at the replacement site; before the chiseling, the stress of the pre-supported roof, concrete and steel bars is released to avoid deformation of the steel bars after the chiseling; to ensure that the concrete pouring is completed, the steel bars can continue after the support is removed. force to avoid stress hysteresis.

为实现上述目的，本发明采取的技术方案是：For realizing above-mentioned object, the technical scheme that the present invention takes is:

一种可拆卸循环利用柱混凝土置换支撑方法，具体步骤如下：A detachable recycling column concrete replacement support method, the specific steps are as follows:

步骤1)确定要置换部位受力大小，确定所需支撑钢梁层数，在置换部位上下端钻孔，将对穿螺杆穿入柱；Step 1) Determine the stress of the part to be replaced, determine the number of layers of supporting steel beams required, drill holes at the upper and lower ends of the replacement part, and penetrate the cross-piercing screw into the column;

步骤2)安装上下层支撑钢梁，安装小立柱；Step 2) Install the upper and lower supporting steel beams and install the small columns;

步骤3)安装支撑钢柱，同时安装下端钢垫板和上端钢垫板与上下部支撑钢梁相连，此时钢柱与上部支撑钢梁为未顶紧状态；Step 3) Install the supporting steel column, install the lower end steel backing plate and the upper end steel backing plate to connect with the upper and lower supporting steel beams at the same time, at this time, the steel column and the upper supporting steel beam are in an untightened state;

步骤4)安装支撑框架梁用型钢，此时型钢与框架梁为未顶紧状态；Step 4) install the profiled steel for supporting the frame beam, and now the profiled steel and the frame beam are in an untightened state;

步骤5)安装支顶用型钢，放置千斤顶；Step 5) install the section steel for supporting the top, and place the jack;

步骤6)千斤顶施加对支顶用型钢施加力，此时钢柱向上顶紧支撑钢梁，通过对拉螺杆和小立柱等向待置换柱施加预顶力；Step 6) The jack applies a force to the profiled steel used for supporting the roof. At this time, the steel column is pressed upward to support the steel beam, and a pre-jacking force is applied to the column to be replaced by pulling the screw rod and the small column;

步骤7)此时钢柱与下层钢梁脱开，中间空隙采用灌浆料或者结构胶填充。Step 7) At this time, the steel column is separated from the lower steel beam, and the gap in the middle is filled with grouting material or structural glue.

作为本发明进一步改进，步骤1)所述支撑钢梁分为上支撑钢梁和下支撑钢梁，支撑钢梁通过对拉螺杆与原柱连接；对拉螺杆穿过柱上的钻孔；根据待置换柱受力大小确定对拉螺杆根数和支撑钢梁层数。As a further improvement of the present invention, the supporting steel beam described in step 1) is divided into an upper supporting steel beam and a lower supporting steel beam, and the supporting steel beam is connected with the original column through a tension screw; the tension screw passes through the drill hole on the column; according to The force on the column to be replaced determines the number of tension screws and the number of layers of supporting steel beams.

作为本发明进一步改进，上支撑钢梁和下支撑钢梁均设置至少2层支撑支撑钢梁，每层支撑钢梁间通过小立柱相连。As a further improvement of the present invention, both the upper supporting steel beam and the lower supporting steel beam are provided with at least two layers of supporting supporting steel beams, and the supporting steel beams of each layer are connected by small columns.

作为本发明进一步改进，步骤3)所述支撑钢柱通过钢垫板与上层支撑钢梁相连；通过钢垫板和高强灌浆料填充与下层支撑钢梁相连，同时设置加劲肋板份担传力。As a further improvement of the present invention, the supporting steel column in step 3) is connected to the upper supporting steel beam through a steel backing plate; it is connected to the lower supporting steel beam through a steel backing plate and high-strength grouting material filling, and a stiffening rib is set at the same time to share the force transmission .

作为本发明进一步改进，步骤4)框架梁下设置支撑梁用型钢，型钢与支撑钢柱连接。As a further improvement of the present invention, in step 4) a section steel for the support beam is arranged under the frame beam, and the section steel is connected with the support steel column.

作为本发明进一步改进，步骤5)设置预顶用钢梁与钢柱连接，千斤顶放置在下部支撑钢梁上，通过预顶用钢梁支顶支撑钢柱。As a further improvement of the present invention, in step 5) a steel beam for pre-jacking is connected to the steel column, the jack is placed on the lower supporting steel beam, and the steel column is supported by the steel beam for pre-jacking.

与现有技术相比，本发明的有益效果为：Compared with prior art, the beneficial effect of the present invention is:

1、本支撑系统可以有效传递上层柱的应力到下层柱，防止置换部位混凝土凿除后上层柱产生变形影响结构安全，保证框架柱置换混凝土加固施工时的安全性。1. This support system can effectively transfer the stress of the upper column to the lower column, prevent the deformation of the upper column after the concrete is chiseled at the replacement part, and affect the structural safety, and ensure the safety of the frame column replacement concrete reinforcement construction.

2、对支撑系统进行了预顶，有限防止控制支撑的变形对结构带来的不利影响；同时释放置换混凝土的应力和应变，避免因混凝土凿除后钢筋变形过大而重新绑扎钢筋。2. Pre-jacking is carried out on the support system to limit the adverse effects of the deformation of the control support on the structure; at the same time, the stress and strain of the replaced concrete are released to avoid re-binding of the steel bars due to excessive deformation of the steel bars after the concrete is chiseled.

3、该支撑系统中对拉螺杆与柱、支撑钢梁与对拉螺杆、支撑钢柱与钢梁等所有连接采用螺栓或搁置方式，钢构件实现了可拆卸载利用，节省了工期、有效控制了造价。3. In the support system, bolts or shelving are used for all connections between the tensioning screw and the column, the supporting steel beam and the tensioning screw, and the supporting steel column and the steel beam. The steel components can be disassembled and loaded, saving the construction period and effectively controlling cost.

4、该支撑系统具有经济可靠、安全性高、便于施工、施工质量好等特点。4. The support system has the characteristics of economy, reliability, high safety, convenient construction and good construction quality.

附图说明Description of drawings

图1是本发明的立面布置图(跨楼层)；Fig. 1 is the facade layout drawing (cross floors) of the present invention;

图2是本发明的立面布置图(上下层)；Fig. 2 is the elevation layout drawing (upper and lower floors) of the present invention;

图3是本发明的支撑钢梁处剖面图；Fig. 3 is a sectional view of the supporting steel beam of the present invention;

图4是本发明的支撑钢柱处剖面图；Fig. 4 is a cross-sectional view at the supporting steel column of the present invention;

图5是本发明的小立柱处剖面图；Fig. 5 is a sectional view at the small column of the present invention;

图6是本发明的待置换梁柱节点处断面图；Fig. 6 is a cross-sectional view of the beam-column node to be replaced in the present invention;

图7是本发明的千斤顶处剖面图。Fig. 7 is a sectional view of the jack of the present invention.

以上图中有：In the above picture there are:

1、待置换柱；2、上层柱；3、下层柱；4、框架梁；5、支撑钢柱；6、支撑钢梁；7、对穿螺杆；1. Column to be replaced; 2. Upper column; 3. Lower column; 4. Frame beam; 5. Supporting steel column; 6. Supporting steel beam; 7. Opposite screw;

8、钢垫板；9、千斤顶；10、预顶钢梁；11、支撑梁用型钢；12、小立柱；13、高强灌浆料填充；14、加劲肋板；15、连接角钢；16、连接螺栓；17、大螺杆；18、大螺母。8. Steel backing plate; 9. Jack; 10. Pre-jacking steel beam; 11. Section steel for supporting beam; 12. Small column; 13. Filling with high-strength grouting material; 14. Stiffening rib; 15. Connecting angle steel; Bolt; 17, large screw rod; 18, large nut.

具体实施方式Detailed ways

下面结合附图和具体实施例对本发明作进一步说明，以使本领域的技术人员可以更好地理解本发明并能予以实施，但所举实施例不作为对本发明的限定。The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

参照参照附图1及附图2所示，本发明的用于柱混凝土置换的可拆卸再利用支撑系统的一例实施例，包括待置换柱1；上层柱2；下层柱3；框架梁4；支撑钢柱5；支撑钢梁6；对穿螺杆7；钢垫板8；千斤顶9；预顶钢梁10；支撑梁用型钢11；小立柱12；高强灌浆料填充13；加劲肋板14；连接角钢15；连接螺栓16；具体实施步骤如下：Referring to accompanyingdrawings 1 and 2, an embodiment of the detachable and reusable support system for column concrete replacement of the present invention includes a column to be replaced 1; anupper column 2; a lower column 3; aframe beam 4; Supportingsteel column 5; supportingsteel beam 6; piercingscrew 7;steel backing plate 8;jack 9; Connectingangle steel 15; Connectingbolt 16; Concrete implementation steps are as follows:

其中支撑钢梁处剖面图如图3所示，支撑钢柱处剖面图如图4所示，小立柱处剖面图如图5所示，待置换梁柱节点处断面图如图6所示，千斤顶处剖面图如图7所示。The cross-sectional view of the supporting steel beam is shown in Figure 3, the cross-sectional view of the supporting steel column is shown in Figure 4, the cross-sectional view of the small column is shown in Figure 5, and the cross-sectional view of the beam-column node to be replaced is shown in Figure 6. The sectional view of the jack is shown in Figure 7.

构体系布置及荷载情况，计算待置换部位柱的受力情况，包括轴力，弯矩，剪力等。根据实际情况决定是否考虑风荷载、地震力等。Structural system layout and load conditions, calculate the force conditions of the columns to be replaced, including axial force, bending moment, shear force, etc. Decide whether to consider wind load, earthquake force, etc. according to the actual situation.

根据受力情况计算确定支撑钢柱5、支撑钢梁6、对穿螺杆7等构件截面积。Calculate and determine the cross-sectional area of supportingsteel columns 5, supportingsteel beams 6,cross-piercing screw rods 7 and other components according to the stress situation.

工厂按照标准尺寸成套预制钢构件，因层高不同、需置换混凝土柱高度不同支撑钢柱5可采用预制拼接的方式，现场根据实际需要接长，确定上下层支撑钢梁6、对穿螺杆7所在位置。The factory completes the prefabricated steel components according to the standard size. Due to the different floor heights and the different heights of the concrete columns that need to be replaced, the supportingsteel columns 5 can be prefabricated and spliced. location.

现场对混凝土柱钻孔，将对穿螺杆7穿过。空隙内不填充任何材料，方便对穿螺杆7后期取出。安装支撑钢梁6、小立柱12。安装支撑钢柱5，钢柱分段预制时分段安装，做好连接部位的安装，保证钢柱竖直。安装支撑梁用型钢11、预顶钢梁10；The concrete column is drilled on the spot, and the piercingscrew 7 is passed through. No material is filled in the gap, which is convenient for taking out thescrew rod 7 in the later stage.Support steel beam 6,small column 12 are installed. Install the supportingsteel column 5, install in sections when the steel column is prefabricated in sections, and do a good job in the installation of the connecting parts to ensure that the steel column is vertical. Install supporting beams withsection steel 11 and pre-top steel beams 10;

根据待置换部位柱的受力情况确定千斤顶9加载力。加载力不小于待置换部位柱的受力大小的30％。根据千斤顶9进行预顶，支撑钢柱5顶紧后，分级加载。每级加载力不大于5％。加载结束后拧紧连接螺栓16，同时安装连接角钢15防止支撑钢柱5平面外失稳。浇筑高强灌浆料填充13。Determine the loading force of thejack 9 according to the stress of the column at the position to be replaced. The loading force is not less than 30% of the force of the column at the position to be replaced. Carry out pre-jacking according to thejack 9, and after the supportingsteel column 5 is tightened, load in stages. The loading force of each level is not more than 5%. Tighten the connectingbolts 16 after loading, and install the connectingangle steel 15 at the same time to prevent the supportingsteel column 5 from being unstable outside the plane. Filling 13 with pouring high-strength grouting material.

待高强灌浆料填充13达到设计强度后，卸除千斤顶9，荷载转换为由支撑系统传递。此时可以凿除柱混凝土，对柱混凝土进行置换。After the high-strength grouting material filling 13 reaches the design strength, thejack 9 is removed, and the load is converted to be transmitted by the support system. At this time, the column concrete can be chiseled out, and the column concrete can be replaced.

混凝土柱置换完成达到设计强度后，拆除支撑系统。首先凿除高强灌浆料填充13，此时因其处于受力状态，凿除时应注意安全。凿除完成后支撑系统应力释放，上部荷载有置换部位混凝土承受。拆除保护性拆除整个支撑系统，保证其可循环利用。After the replacement of the concrete column reaches the design strength, the support system is removed. Firstly, the high-strength grouting material filling 13 is chiseled out. At this time, because it is under stress, safety should be paid attention to when chiseling it out. After the chiseling is completed, the stress of the support system is released, and the upper load is borne by the concrete at the replacement part. Dismantling Protective dismantling of the entire support system to ensure its recyclability.

以上实施例仅是为充分说明本发明而所举的较佳的实施例，本发明的应用范围不限于此。对于本领域的技术人员来说，在不脱离本发明结构的前提下，还可以做出若干变形和改进，比如根据受力大小，上下支撑钢梁减少为两根，支撑钢梁与上下层柱贴邻布置，然后设置支撑钢柱。或者支撑钢柱更换为钢螺杆，千斤顶预顶上支撑钢梁，顶紧后拧紧钢螺杆上的大螺母，如附图2所示。本技术领域的技术人员在本发明基础上所作的等同替代或变换，均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。The above embodiments are only preferred embodiments for fully illustrating the present invention, and the scope of application of the present invention is not limited thereto. For those skilled in the art, under the premise of not departing from the structure of the present invention, some deformations and improvements can also be made. For example, according to the magnitude of the force, the upper and lower supporting steel beams are reduced to two, and the supporting steel beams and the upper and lower columns Adjacent to the layout, and then set the supporting steel column. Or the supporting steel column is replaced with a steel screw rod, the jack is pre-jacked to support the steel beam, and after the jacking is tight, the large nut on the steel screw rod is tightened, as shown in Figure 2. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention. The protection scope of the present invention shall be determined by the claims.

Claims (6)

Translated fromChinese

1.一种可拆卸循环利用柱混凝土置换支撑方法，具体步骤如下，其特征在于：1. A detachable recycling column concrete replacement support method, the concrete steps are as follows, it is characterized in that:步骤1)确定要置换部位受力大小，确定所需支撑钢梁层数，在置换部位上下端钻孔，将对穿螺杆穿入柱；Step 1) Determine the stress of the part to be replaced, determine the number of layers of supporting steel beams required, drill holes at the upper and lower ends of the replacement part, and penetrate the cross-piercing screw into the column;步骤2)安装上下层支撑钢梁，安装小立柱；Step 2) Install the upper and lower supporting steel beams and install the small columns;步骤3)安装支撑钢柱，同时安装下端钢垫板和上端钢垫板与上下部支撑钢梁相连，此时钢柱与上部支撑钢梁为未顶紧状态；Step 3) Install the supporting steel column, install the lower end steel backing plate and the upper end steel backing plate to connect with the upper and lower supporting steel beams at the same time, at this time, the steel column and the upper supporting steel beam are in an untightened state;步骤4)安装支撑框架梁用型钢，此时型钢与框架梁为未顶紧状态；Step 4) install the profiled steel for supporting the frame beam, and now the profiled steel and the frame beam are in an untightened state;步骤5)安装支顶用型钢，放置千斤顶；Step 5) install the section steel for supporting the top, and place the jack;步骤6)千斤顶施加对支顶用型钢施加力，此时钢柱向上顶紧支撑钢梁，通过对拉螺杆和小立柱等向待置换柱施加预顶力；Step 6) The jack applies a force to the profiled steel used for supporting the roof. At this time, the steel column is pressed upward to support the steel beam, and a pre-jacking force is applied to the column to be replaced by pulling the screw rod and the small column;步骤7)此时钢柱与下层钢梁脱开，中间空隙采用灌浆料或者结构胶填充。Step 7) At this time, the steel column is separated from the lower steel beam, and the gap in the middle is filled with grouting material or structural glue.2.根据权利要求1所述的一种可拆卸循环利用柱混凝土置换支撑方法，其特征在于：2. A detachable recycling column concrete replacement support method according to claim 1, characterized in that:步骤1)所述支撑钢梁分为上支撑钢梁和下支撑钢梁，支撑钢梁通过对拉螺杆与原柱连接；对拉螺杆穿过柱上的钻孔；根据待置换柱受力大小确定对拉螺杆根数和支撑钢梁层数。Step 1) The supporting steel beam is divided into an upper supporting steel beam and a lower supporting steel beam, and the supporting steel beam is connected with the original column through a tension screw; the tension screw passes through the drill hole on the column; Determine the number of tension screws and the number of layers of supporting steel beams.3.根据权利要求2所述的一种可拆卸循环利用柱混凝土置换支撑方法，其特征在于：3. A detachable recycling column concrete replacement support method according to claim 2, characterized in that:上支撑钢梁和下支撑钢梁均设置至少2层支撑支撑钢梁，每层支撑钢梁间通过小立柱相连。Both the upper supporting steel beam and the lower supporting steel beam are provided with at least 2 layers of supporting supporting steel beams, and the supporting steel beams of each layer are connected by small columns.4.根据权利要求2所述的一种可拆卸循环利用柱混凝土置换支撑方法，其特征在于：4. A detachable recycling column concrete replacement support method according to claim 2, characterized in that:步骤3)所述支撑钢柱通过钢垫板与上层支撑钢梁相连；通过钢垫板和高强灌浆料填充与下层支撑钢梁相连，同时设置加劲肋板份担传力。Step 3) The supporting steel column is connected to the upper supporting steel beam through the steel backing plate; connected to the lower supporting steel beam through the steel backing plate and high-strength grouting material filling, and the stiffening ribs are set at the same time to share the force transmission.5.根据权利要求1所述的一种可拆卸循环利用柱混凝土置换支撑方法，其特征在于：5. A detachable recycling column concrete replacement support method according to claim 1, characterized in that:步骤4)框架梁下设置支撑梁用型钢，型钢与支撑钢柱连接。Step 4) The profiled steel for the supporting beam is arranged under the frame beam, and the profiled steel is connected with the supporting steel column.6.根据权利要求1所述的一种可拆卸循环利用柱混凝土置换支撑方法，其特征在于：6. A detachable recycling column concrete replacement support method according to claim 1, characterized in that:步骤5)设置预顶用钢梁与钢柱连接，千斤顶放置在下部支撑钢梁上，通过预顶用钢梁支顶支撑钢柱。Step 5) Connect the steel beams for pre-jacking to the steel columns, place the jack on the lower supporting steel beams, and support the steel columns through the steel beams for pre-jacking.

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