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

Method for reinforcing masonry structure building base Download PDF

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Publication number
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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China
Prior art keywords
foundation
channel
basis
section steel
masonry
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Expired - Fee Related
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CN2008100472666A
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Chinese (zh)
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CN101250886A (en
Inventor
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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Wuhan University WHU
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Publication of CN101250886A publication Critical patent/CN101250886A/en
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Publication of CN101250886B publication Critical patent/CN101250886B/en
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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

A kind of method of reinforcing masonry structure building base
Technical field
The present invention relates to a kind of method of reinforcing masonry structure building base, be applicable to, belong to the civil construction project field masonry structure building foundation integral reinforcing.
Background technology
Present China is in a large-scale building and builds period, a lot of new building thing foundation dredgings, tunnel excavation etc., tend to cause adjacent building lot generation differential settlement, and differential settlement is fatal to ancient masonry structure building, can cause the load bearing wall cracking, tilts even collapse.Masonry structure in the Structural Engineering of China in occupation of crucial status; many ancient masonry structure buildings have been represented the civilization degree in epoch; witness development of history; having very high historical relic is worth and ornamental value; therefore, be necessary the basis of masonry structure that conservation value is arranged is reinforced.In addition, when new the requirement do not satisfied on the basis of original masonry structure, also need the basis is reinforced.Existing main underpin technology has: underpinning method, basic reinforcing method, strengthen basic sectional area, deepen lex fundamentalis, pile underpinning method, formula static pressed pile hole, hole method or the like, and more patented technology is arranged.As patent application 95112401.3 the house foundation reinforcement means that former pile cap is replaced in a kind of indoor static pressure stake has been proposed, patent patent application 200510033300.0 has proposed rectification of a kind of building by filling water formula and underpin method, and patent application 200610104414.4 has proposed a kind of method that adopts base tunnel formula hand excavated pile that the existing building basis is reinforced and underpins.Underpin is more convenient and effective to said method for concrete structure, but for the masonry basis of heritage buildings, adopts prior art to reinforce and have a lot of problems:
1, the masonry ancient building of conservation value is arranged mostly, and the basis mostly is the strip foundation of masonry structure, and does not have collar tie beam, when adopting the reinforcing of prior art such as foundation underpinning or intensification method, is difficult to directly the basis be held up, and easily makes the basis produce disturbance and destruction.
2, because the particularity of masonry structure, it is stressed jointly that the part that newly adds and original base are difficult for closely being connected, is difficult to guarantee basic globality and good stress that strengthening quality is difficult to be guaranteed.Consolidation effect is poor.
3, majority has the masonry building of conservation value because of the remote past; its ground comparatively robust; adopt a lot of prior aries such as foundation underpinning, basic intensification method etc. to tend to excavate the below of substrate; engineering quantity is big; and can make original firm soil suffer disturbance, structure is had a negative impact.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of method of new reinforcing masonry structure building base is provided, by cast-in-situ steel reinforced concrete raft plate on the original building ground, be connected with channel-section steel by anchor pole with former basis around the raft plate, form a raft foundation that integral rigidity is bigger with original base, reduce differential settlement.
The method that the invention provides reinforcing masonry structure building base may further comprise the steps:
(1) excavation ground.Appropriate depth is excavated on ground, exposed the basis, and carry out removing surface.Smooth flooring.
(2) skyhook.To piercing hole, pass the basis in the appropriate location, both sides on masonry basis, and in hole, inject high-intensity inorganic perfusion material, guarantee that hole is closely knit with anchor pole.
(3) channel-section steel is installed.Channel-section steel is installed in two sides, basis in step (2), has preformed hole to pass by anchor pole on the channel-section steel, with nut channel-section steel is anchored on the basis afterwards, and injects high-strength inorganic perfusion material between channel-section steel and basis, and is closely knit to guarantee.
(4) arrange steel mesh reinforcement.Directly arrange raft plate steel mesh reinforcement on the flooring after smooth, the two ends of reinforcing bar and channel-section steel weld at place, the edge of a wing.
(5) the cast-in-place concrete of building.Concreting is to specifying absolute altitude, levelling maintenance, backfill or carry out other maintenances and handle afterwards.
Channel-section steel is installed in both sides on former basis, adopts anchor pole to pass the basis and comes the anchoring channel-section steel.In order to guarantee that channel-section steel closely is connected with the basis with anchor pole, the high-intensity inorganic perfusion material of perfusion in hole and between channel-section steel and the basis.
The present invention has the following advantages:
1. reinforcement means provided by the invention, adopt anchor pole the basis to be connected with cast-in-place raft plate with channel-section steel, changed the stress form on former basis, formed a kind of good raft foundation of globality of big rigidity newly, by anchor pole to passing basis and channel-section steel, can guarantee the transmission of power by the dowel action of anchor pole, guarantee consolidation effect.This reinforcement means has the effect of highly significant to the influence of building to the differential settlement that alleviates ground.
2. adopt existing most of underpin technology all will excavate below the substrate absolute altitude, disturbance to soil is very big, influence consolidation effect, and the reinforcement means that the present invention proposes, adopting anchor pole to pass basic side connects, do not need to be excavated to below the substrate absolute altitude, very little to the influence of the old soil in bottom.Big and body of wall can reduce cutting depth in order the time when embedded depth of foundation, passes body of wall with anchor pole and reinforces, and need not to pass the basis.
3. applying flexible can carry out whole reinforcing to whole masonry basis, also can reinforce at certain part.
4. easy construction is simple, does not need main equipment, short construction period.
Description of drawings
Fig. 1 is the structural representation of the masonry structure building base of use inventive method reinforcing.
Fig. 2 is the A-A cut-away view of Fig. 1.
Among the figure: 1. ground, 2. former basis, 3. anchor pole, 4. channel-section steel, 5. steel mesh reinforcement, 6. cast-in-situ concrete, 7. backfill, 8. hole, 9. inorganic perfusion material.
The specific embodiment:
The scheme that present embodiment is to use the method for reinforcing masonry structure building base of the present invention that a historical relic's protection building masonry basis is reinforced, as depicted in figs. 1 and 2.The present invention is further illustrated below in conjunction with accompanying drawing.
1, the building present situation is detected assessment,, determine the thickness and the buried depth of concrete raft plate with reference to corresponding standard according to sedimentation degree, force-bearing situation and former basic 2 the conditions such as present situation of ground 1.Basis 2, smooth flooring are exposed in excavation ground.
2, calculate installation site and the quantity of determining anchor pole 3 according to conditions such as basal status, force-bearing situation, scantling and structure requirements.On former basic 2, hole 8, pass the basis and in hole, inject high-intensity inorganic perfusion material, guarantee that hole is closely knit with anchor pole 3.In order to reduce the disturbance to the basis, perforate should be staggeredly arranged up and down.
3, by the length on basis and the position processing channel-section steel 4 of hole, with nut channel-section steel 4 is anchored on former basic 2 afterwards, and between channel-section steel 4 and former basic 2, injects high-strength inorganic perfusion material 9, guarantee the transmission of power.Channel-section steel 4 is provided with preformed hole and passes by anchor pole 3.
4, directly arrange raft plate steel mesh reinforcement 5 on the flooring after smooth, reinforcing bar two ends and channel-section steel 4 weld at place, the edge of a wing.
5, concreting 6 is to specifying absolute altitude, levelling maintenance.
6, after concrete curing finishes, with the indoor absolute altitude of backfill 7 backfill ground to appointment.

Claims (2)

1. the method for a reinforcing masonry structure building base is characterized in that may further comprise the steps:
(1) excavates ground, ground is excavated expose the masonry basis, and carry out removing surface, smooth flooring;
(2) skyhook to piercing hole, passes the masonry basis with anchor pole from hole in both sides, masonry basis, injects inorganic perfusion material then in hole, guarantees that hole is closely knit;
(3) channel-section steel is installed, channel-section steel is installed in two sides on masonry basis in step (2), with nut channel-section steel is anchored on the masonry basis then, injects inorganic perfusion material then between channel-section steel and masonry basis, and is closely knit to guarantee;
(4) arrange steel mesh reinforcement, directly arrange raft plate steel mesh reinforcement on the flooring after smooth, the two ends of reinforcing bar and channel-section steel weld at place, the edge of a wing;
(5) the cast-in-place concrete of building, concreting be to specifying absolute altitude, levelling maintenance, backfill or carry out other maintenances and handle afterwards.
2. according to the method for the described reinforcing masonry structure building base of claim 1, it is characterized in that: channel-section steel is provided with preformed hole and passes by anchor pole.
CN2008100472666A 2008-04-09 2008-04-09 Method for reinforcing masonry structure building base Expired - Fee Related CN101250886B (en)

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Application Number Priority Date Filing Date Title
CN2008100472666A CN101250886B (en) 2008-04-09 2008-04-09 Method for reinforcing masonry structure building base

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Application Number Priority Date Filing Date Title
CN2008100472666A CN101250886B (en) 2008-04-09 2008-04-09 Method for reinforcing masonry structure building base

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CN101250886A CN101250886A (en) 2008-08-27
CN101250886B true CN101250886B (en) 2010-08-18

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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102182326B (en) * 2011-04-02 2012-06-27 武汉大学 Strengthening method for concrete flexural member
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
CN109779636A (en) * 2019-02-25 2019-05-21 中交(广州)建设有限公司 The ruggedized construction of existing building is worn under a kind of shield tunnel
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
CN112854290A (en) * 2021-01-15 2021-05-28 宁波市电力设计院有限公司 Construction method for reinforcing transformer substation equipment foundation
CN114922171B (en) * 2022-04-28 2023-12-29 浙江宏日泰耐克新材料科技有限公司 Foundation reinforcing structure of multi-layer masonry building and construction method

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