CN101250886B - Method for reinforcing masonry structure building base - Google Patents

Method for reinforcing masonry structure building base Download PDF

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CN101250886B
CN101250886B CN2008100472666A CN200810047266A CN101250886B CN 101250886 B CN101250886 B CN 101250886B CN 2008100472666 A CN2008100472666 A CN 2008100472666A CN 200810047266 A CN200810047266 A CN 200810047266A CN 101250886 B CN101250886 B CN 101250886B
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foundation
channel steel
masonry
anchor
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CN101250886A (en
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卢亦焱
黄银燊
廖绍怀
何英明
吴聪慧
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Wuhan University WHU
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Abstract

The invention discloses a method of reinforcing a masonry structure building foundation, which is that a reinforced concrete slab is cast on an original building foundation and is connected with an original foundation together to form a raft foundation to resist uneven settlement. The implementation method is that the foundation is excavated to an appointed depth, two channel steels are arranged on the two sides of the original foundation, an anchor is used to pass through a foundation anchorage channel steel, the two ends of a mesh reinforcement in the concrete slab are welded on the flange of the channel steel, and then the concrete slab is cast. The reinforcing method changes the form of the foundation, the channel steel and the anchor are closely connected with the foundation, the force transmission is guaranteed, thereby forming the raft foundation whose whole stiffness is large. The method has the advantages that the whole performance is excellent, foundation soil is not disturbed when constructing, and the using is flexible and the like. The method is suitable to integrally reinforce an ancient architecture foundation of a masonry structure with protection value, thereby reducing the harmful effect which is produced by the uneven settlement of the foundation to the building.

Description

一种加固砌体结构建筑物基础的方法 A method for strengthening the foundation of a masonry structure building

技术领域technical field

本发明涉及一种加固砌体结构建筑物基础的方法,适用于对砌体结构建筑基础整体加固,属于土木建筑工程领域。The invention relates to a method for strengthening the foundation of a building with a masonry structure, which is suitable for overall reinforcement of the building foundation with a masonry structure, and belongs to the field of civil engineering.

背景技术Background technique

目前我国正处在一个大规模的土木兴建时期,很多新建建筑物地基开挖、隧道开挖等,往往会导致相邻的建筑地基发生不均匀沉降,而不均匀沉降对古老的砌体结构房屋是致命的,会导致承重墙开裂、倾斜甚至倒塌。砌体结构在我国的结构工程中占据着十分重要的地位,许多古老的砌体结构建筑物代表了一个时代的文明程度,见证了历史的发展,具有很高的文物价值和观赏价值,因此,有必要对有保护价值的砌体结构的基础进行加固。此外,当原有砌体结构的基础满足不了新的要求时,也需要对基础进行加固。现有的主要基础加固技术有:托换加固法、基础补强加固法、加大基础截面积、加深基础法、桩式托换法、坑式静压桩坑法等等,且有较多的专利技术。如专利申请95112401.3提出了一种室内静力压桩置换原桩承台的房屋基础加固方法,专利专利申请200510033300.0提出了一种建筑物充水式纠倾及基础加固方法,专利申请200610104414.4提出了一种采用导坑式人工挖孔桩对既有建筑物基础进行加固与托换的方法。上述方法对于混凝土结构基础加固是比较方便和有效的,但对于古建筑物的砌体基础,采用现有技术进行加固存在很多问题:At present, our country is in a period of large-scale civil engineering construction. Excavation of foundations of many new buildings, tunnel excavation, etc. often lead to uneven settlement of adjacent building foundations. It is fatal and can cause load-bearing walls to crack, tip and even collapse. The masonry structure occupies a very important position in the structural engineering of our country. Many ancient masonry structures represent the civilization level of an era, witness the development of history, and have high cultural relic value and ornamental value. Therefore, It is necessary to reinforce the foundations of masonry structures that have conservation value. In addition, when the foundation of the original masonry structure cannot meet the new requirements, the foundation also needs to be reinforced. The existing main foundation reinforcement techniques include: underpinning reinforcement method, foundation reinforcement reinforcement method, increasing foundation cross-sectional area, deepening foundation method, pile underpinning method, pit static pressure pile pit method, etc., and there are many patented technology. For example, patent application 95112401.3 proposes a building foundation reinforcement method for replacing original pile caps with indoor static pressure piles, patent application 200510033300.0 proposes a building water-filled rectification and foundation reinforcement method, and patent application 200610104414.4 proposes a The invention discloses a method for reinforcing and underpinning the foundation of an existing building by adopting a pilot-pit type manual excavation pile. The above method is more convenient and effective for the reinforcement of the concrete structure foundation, but for the masonry foundation of ancient buildings, there are many problems in the reinforcement of the existing technology:

1、大多有保护价值的砌体古建筑,基础多为砖石结构的条形基础,且无圈梁,采现有技术如基础托换或加深法加固时,很难直接将基础托起,易使基础产生扰动和破坏。1. Most of the masonry ancient buildings with protection value are mostly strip foundations of masonry structure, and there is no ring beam. It is difficult to directly support the foundation when using existing technologies such as foundation underpinning or deepening method for reinforcement. It is easy to cause disturbance and damage to the foundation.

2、由于砌体结构的特殊性,新加的部分与原有基础不易紧密连接共同受力,很难保证基础的整体性和良好的受力状态,加固质量难以得到保证。加固效果差。2. Due to the particularity of the masonry structure, the newly added part is not easy to be closely connected with the original foundation to bear the force together, it is difficult to ensure the integrity of the foundation and a good stress state, and it is difficult to guarantee the quality of reinforcement. The reinforcement effect is poor.

3、多数有保护价值的砌体建筑物由于年代久远,其地基比较坚固,采用很多现有技术如基础托换、基础加深法等往往会需要开挖到基底的下方,工程量大,且会使本来坚固的土壤遭到扰动,对结构产生不利影响。3. Most masonry buildings with protection value have a relatively strong foundation due to their long history. Many existing technologies such as foundation underpinning and foundation deepening methods often need to be excavated to the bottom of the basement, which requires a large amount of engineering and will Disturb the originally solid soil and have adverse effects on the structure.

发明内容Contents of the invention

本发明目的在于克服上述现有技术的不足,提供一种新的加固砌体结构建筑物基础的方法,通过在原建筑物地基上现浇钢筋混凝土筏板,筏板四周与原基础通过锚杆和槽钢连接,与原有基础一起形成一个整体刚度较大的筏板基础,减少不均匀沉降。The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and provide a new method for strengthening the foundation of a masonry structure building. By casting a reinforced concrete raft on the original building foundation, the raft is surrounded by the original foundation through anchor rods and The channel steel connection forms a raft foundation with high overall rigidity together with the original foundation to reduce uneven settlement.

本发明提供加固砌体结构建筑物基础的方法包括以下步骤:The present invention provides the method for strengthening the foundation of a masonry structure building comprising the following steps:

(1)开挖地基。将地面开挖到适当深度,露出基础,并进行表面清理。平整室内地面。(1) Excavate the foundation. Excavate the ground to the appropriate depth to expose the foundation and clean the surface. Level the interior floor.

(2)安装锚杆。在砌体基础的两侧适当位置对穿孔洞,用锚杆穿过基础,并向孔洞内注入高强度的无机灌注料,保证孔洞密实。(2) Install the anchor rod. Punch holes at appropriate positions on both sides of the masonry foundation, use anchor rods to pass through the foundation, and inject high-strength inorganic pouring material into the holes to ensure that the holes are dense.

(3)安装槽钢。在步骤(2)中基础两个侧面安装槽钢,槽钢上有预留孔让锚杆穿过,之后用螺帽将槽钢锚固在基础上,并在槽钢和基础之间注入高强无机灌注料,以保证密实。(3) Install channel steel. In step (2), channel steel is installed on both sides of the foundation. There are reserved holes on the channel steel for anchor rods to pass through, and then the channel steel is anchored to the foundation with nuts, and high-strength inorganic steel is injected between the channel steel and the foundation. Filling material to ensure compactness.

(4)布置钢筋网。直接在平整后的室内地面上布置筏板钢筋网,钢筋的两端与槽钢在翼缘处焊接。(4) Arrange the steel mesh. The raft reinforcement mesh is directly arranged on the leveled indoor ground, and the two ends of the reinforcement are welded to the channel steel at the flange.

(5)现浇筑混凝土。浇筑混凝土到指定标高,找平养护,之后回填土或者进行其他修护处理。(5) Cast-in-place concrete. Pouring concrete to the specified elevation, leveling and curing, and then backfilling or other repairs.

在原基础的两侧安装槽钢,采用锚杆穿过基础来锚固槽钢。为了保证槽钢和锚杆与基础紧密连接,在孔洞内以及槽钢和基础之间灌注高强度的无机灌注料。Install channel steel on both sides of the original foundation, and use anchor rods to pass through the foundation to anchor the channel steel. In order to ensure that the channel steel and the anchor rod are closely connected with the foundation, high-strength inorganic pouring material is poured into the hole and between the channel steel and the foundation.

本发明具有以下优点:The present invention has the following advantages:

1.本发明提供的加固方法,采用锚杆和槽钢将基础与现浇筏板连接,改变了原基础的受力形式,形成了一种新的大刚度的整体性良好的筏板基础,通过锚杆对穿过基础和槽钢,能通过锚杆的销栓作用确保力的传递,保证加固效果。本加固方法对减轻地基的不均匀沉降对建筑物的影响有非常显著的效果。1. The reinforcement method provided by the present invention adopts anchor rods and channel steels to connect the foundation with the cast-in-place raft, changes the stress form of the original foundation, and forms a new raft foundation with high rigidity and good integrity. Through the anchor rod pair passing through the foundation and the channel steel, the force transmission can be ensured through the pin bolt action of the anchor rod, and the reinforcement effect can be guaranteed. The reinforcement method has a very significant effect on alleviating the influence of the uneven settlement of the foundation on the building.

2.采用现有大多数基础加固技术均要开挖到基底标高以下,对土壤的扰动很大,影响加固效果,而本发明提出的加固方法,采用锚杆穿过基础侧面进行连接,不需要开挖至基底标高以下,对下部老土的影响很小。当基础埋深较大、且墙体状况良好时,可以减少开挖深度,用锚杆穿过墙体进行加固,而无需穿过基础。2. Most of the existing foundation reinforcement technologies require excavation below the base elevation, which greatly disturbs the soil and affects the reinforcement effect. However, the reinforcement method proposed in the present invention uses anchor rods to pass through the foundation side for connection, and does not require Excavation below the base level will have little impact on the old soil below. When the foundation depth is large and the wall is in good condition, the excavation depth can be reduced, and anchors can be used to pass through the wall for reinforcement without going through the foundation.

3.应用灵活,可以对整个砌体基础进行整体的加固,也可以针对某个局部进行加固。3. The application is flexible, and the entire masonry foundation can be reinforced as a whole, or it can be reinforced for a certain part.

4.施工方便简单,不需要大型设备,施工周期短。4. The construction is convenient and simple, no large equipment is required, and the construction period is short.

附图说明Description of drawings

图1为使用发明方法加固的砌体结构建筑物基础的结构示意图。Fig. 1 is a structural schematic diagram of a masonry structure building foundation reinforced by the inventive method.

图2为图1的A-A剖示图。FIG. 2 is a sectional view of A-A in FIG. 1 .

图中:1.地基、2.原基础、3.锚杆、4.槽钢、5.钢筋网、6.现浇混凝土、7.回填土、8.孔洞、9.无机灌注料。In the figure: 1. foundation, 2. original foundation, 3. anchor rod, 4. channel steel, 5. steel mesh, 6. cast-in-place concrete, 7. backfill, 8. hole, 9. inorganic pouring material.

具体实施方式:Detailed ways:

本实施例是使用本发明所述的加固砌体结构建筑物基础的方法对一座文物保护建筑砌体基础进行加固的方案,如图1和图2所示。下面结合附图对本发明作进一步的说明。This embodiment is a plan for strengthening the masonry foundation of a cultural relic protection building by using the method for strengthening the foundation of a masonry structure building according to the present invention, as shown in Fig. 1 and Fig. 2 . The present invention will be further described below in conjunction with the accompanying drawings.

1、对建筑物现状进行检测评估,根据地基1的沉降程度、受力状况及原基础2的现状等条件,参考相应规范来确定混凝土筏板的厚度和埋置深度。开挖地面露出基础2,平整室内地面。1. Check and evaluate the status quo of the building, and determine the thickness and embedment depth of the concrete raft slab by referring to the corresponding specifications according to the settlement degree of the foundation 1, the stress status and the status quo of the original foundation 2. Excavate the ground to expose the foundation 2, and level the indoor ground.

2、根据基础状况、受力状况、材料尺寸及构造要求等条件来计算确定锚杆3的安装位置和数量。在原基础2上钻孔8,用锚杆3穿过基础并向孔洞内注入高强度的无机灌注料,保证孔洞密实。为了减少对基础的扰动,开孔宜上下错开布置。2. Calculate and determine the installation position and quantity of anchor rods 3 according to conditions such as foundation conditions, stress conditions, material dimensions, and structural requirements. Drill holes 8 on the original foundation 2, use anchor rods 3 to pass through the foundation and inject high-strength inorganic pouring material into the holes to ensure that the holes are dense. In order to reduce disturbance to the foundation, the openings should be staggered up and down.

3、按基础的长度和孔洞的位置加工槽钢4,之后用螺帽将槽钢4锚固在原基础2上,并在槽钢4和原基础2之间注入高强无机灌注料9,保证力的传递。槽钢4上设有预留孔让锚杆3穿过。3. Process the channel steel 4 according to the length of the foundation and the position of the hole, then use nuts to anchor the channel steel 4 on the original foundation 2, and inject high-strength inorganic pouring material 9 between the channel steel 4 and the original foundation 2 to ensure the strength transfer. The channel steel 4 is provided with a reserved hole for the anchor rod 3 to pass through.

4、直接在平整后的室内地面上布置筏板钢筋网5,钢筋两端与槽钢4在翼缘处焊接。4. Arrange the raft reinforcement mesh 5 directly on the leveled indoor ground, and weld the two ends of the reinforcement with the channel steel 4 at the flange.

5、浇筑混凝土6到指定标高,找平养护。5. Pouring concrete 6 to the specified elevation, leveling and curing.

6、混凝土养护完毕后,用回填土7回填地面至指定的室内标高。6. After the concrete curing is completed, backfill the ground with backfill soil 7 to the specified indoor elevation.

Claims (2)

1.一种加固砌体结构建筑物基础的方法,其特征在于包括以下步骤:1. A method for strengthening the foundation of a masonry structure building, characterized in that it may further comprise the steps: (1)开挖地基,将地面开挖到露出砌体基础,并进行表面清理,平整室内地面;(1) Excavate the foundation, excavate the ground to expose the masonry foundation, clean the surface, and level the indoor ground; (2)安装锚杆,在砌体基础两侧对穿孔洞,用锚杆从孔洞穿过砌体基础,然后向孔洞内注入无机灌注料,保证孔洞密实;(2) Install anchor rods, perforate holes on both sides of the masonry foundation, use anchor rods to pass through the masonry foundation through the holes, and then inject inorganic pouring material into the holes to ensure that the holes are dense; (3)安装槽钢,在步骤(2)中砌体基础的两个侧面安装槽钢,然后用螺帽将槽钢锚固在砌体基础上,然后在槽钢和砌体基础之间注入无机灌注料,以保证密实;(3) Install the channel steel, install the channel steel on the two sides of the masonry foundation in step (2), then use the nut to anchor the channel steel on the masonry foundation, and then inject inorganic Filling material to ensure compactness; (4)布置钢筋网,直接在平整后的室内地面上布置筏板钢筋网,钢筋的两端与槽钢在翼缘处焊接;(4) Arrange steel mesh, arrange raft steel mesh directly on the leveled indoor ground, and weld the two ends of the steel bar with the channel steel at the flange; (5)现浇筑混凝土,浇筑混凝土到指定标高,找平养护,之后回填土或者进行其他修护处理。(5) In-situ pouring of concrete, pouring concrete to the specified elevation, leveling and curing, and then backfilling or other repairs. 2.根据权利要求1所述加固砌体结构建筑物基础的方法,其特征在于:槽钢上设有预留孔让锚杆穿过。2. The method for strengthening the foundation of a masonry structure building according to claim 1, characterized in that: the channel steel is provided with a reserved hole for the anchor rod to pass through.
CN2008100472666A 2008-04-09 2008-04-09 Method for reinforcing masonry structure building base Expired - Fee Related CN101250886B (en)

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CN103075022B (en) * 2012-11-09 2016-02-03 河南省建设集团有限公司 A kind of existing building masonry increases dark girder construction and construction method thereof
CN103061365A (en) * 2013-01-31 2013-04-24 新兴能源装备股份有限公司 Expanding method of concrete foundation
CN106382016B (en) * 2016-11-18 2019-03-01 青岛博海建设集团有限公司 Ancient building labyrinth integral reinforcing construction technology
CN108086346B (en) * 2018-01-26 2023-09-08 广东省建筑工程机械施工有限公司 Uneven settlement reinforcing device and overcoming method for tower crane foundation
CN109779636B (en) * 2019-02-25 2024-06-07 中交(广州)建设有限公司 Reinforcing structure for shield tunnel to penetrate through existing building
CN110080264B (en) * 2019-05-05 2024-03-15 西安长庆科技工程有限责任公司 Method for locally reinforcing strip-shaped foundation
CN110206135B (en) * 2019-05-21 2024-01-12 福建理工大学 Stone masonry house foundation reinforcing structure and method
CN111926854A (en) * 2020-07-21 2020-11-13 广州地铁设计研究院股份有限公司 Pile foundation reinforcing method
CN112392060B (en) * 2020-12-07 2025-02-18 中建三局集团有限公司 A shallow excavation foundation reinforcement structure and reinforcement method
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