TWI403631B - Structure and Construction Method of Waterproof Shear Force Expansion Joint Structure of Old and New Concrete Building - Google Patents

Abstract

The present invention relates to a waterproof and shear-resistant expansion joint structure for jointing new and old concrete buildings and construction method, in which the structure is arranged between new and old concrete buildings. A groove is first formed in a joint surface of the old concrete building, and one end of a water-stop band is placed in the groove and gaps are filled with a bonding agent. Symmetric L-shaped stainless steel plates fixed on the old concrete building are used to clamp and fix the water-stop band. An opposite end of the water-stop band is cast in the new concrete building. One end of the shear bar of a shear-resistant unit is implanted in the old concrete building with a corresponding sleeve extending into the new concrete building. Filling is made between the joint surfaces of the old concrete building and the new concrete building to form a cushioning layer. Since the shear bar is allowed to move within the sleeve, an expansion joint resistant to shear and variation of temperature can be formed, and the water-sop band uses the L-shaped stainless steel plates to increase tensile pulling force so as to develop waterproof effect.

Description

Waterproof and shear-resistant expansion joint structure and construction method for connecting old and new concrete structures

The invention relates to a waterproof and anti-shear expansion joint structure and a construction method for connecting old and new concrete structures, in particular to an expansion joint structure and a construction method for connecting new and old concrete structures and providing waterproof and shear resistance effects.

The old concrete structure is placed on the site. The site is subjected to the weight of the old concrete building and the amount of trapping is caused. As time goes on, the continuous subsidence of the site will tend to be moderate and stable. Therefore, the site has the contact block of the old concrete building. It will sink closer to the adjacent block that is not loaded with concrete.

Among them, in the lap joint construction of the bridge, the construction of the house, the new and old retaining walls, and the approach roadway of the underground driveway of the building, when the new concrete building needs to be built on the periphery of the old concrete building, the weight of the new concrete building will cause the subsidence of the site. Because the site block below the new concrete building is unstable compared to the site below the old concrete building, and the site block below the new concrete building is in the process of subsidence, it will also affect the stable site where the old concrete structure is located. The block will cause a shear force between the contact surfaces of the new and old concrete structures, causing relative up-and-down displacement between the new and old concrete structures and forming gaps, resulting in leakage and poor water resistance. Therefore, new and old concrete structures The problem of poor shear and water resistance at the connection is a problem that the industry is thinking about and solving.

The main object of the present invention is to provide a waterproof and shear-resistant expansion joint structure and a construction method for connecting old and new concrete structures, and design and improve the design. Generally, the old and new concrete structures are subject to the problem of poor shearing and water repellency.

For the purpose of achieving the foregoing disclosure, the waterproof and shear-resistant expansion joint structure of the new and old concrete structure designed by the present invention is disposed between the old concrete building and the new concrete building, and comprises: at least one shearing unit, The shearing unit comprises a shearing bar implanted on the old concrete building, and a casing cast into the new concrete building, the casing provides the shearing rod to extend; at least one waterproof unit is fastened On one side of the shearing unit, and including a waterstop, one end of the waterstop is disposed in the groove of the old concrete structure, and an adhesive is filled between the waterstop and the old concrete building to form a caulking layer. The water stop belt extends into the new concrete building, and the water-stop belt of the old concrete building is clamped and fixed by the L-shaped stainless steel piece symmetrically disposed on the old concrete building to increase the water stop belt in the old concrete. Anchoring force in the building; and a buffer layer between the old concrete building and the new concrete building.

In order to achieve the foregoing purpose, the construction method of the waterproof and shear-resistant expansion joint structure of the old and new concrete structures designed by the present invention comprises: a trenching operation, and a groove is formed before the joint surface of the old concrete building; In the operation, put one end of the water stop into the groove, fill the adhesive and fill the joint, and then fix the symmetrical L-shaped stainless steel piece to the old concrete building with expansion screws, clamp the fixed water stop and increase the water stop band. The anchoring force in the concrete building, and the waterstop is cast at the other end in the new concrete building; in the shearing operation, the shearing rod of the shearing unit is implanted into the old concrete building at one end. The corresponding casing is inserted into the new concrete structure to provide a matching shear bar extension; and the filling operation is filled to form a buffer layer between the interface between the old concrete structure and the new concrete building.

According to the above, in the waterproof and anti-shear expansion joint structure and construction method of the new and old concrete building of the present invention, the shear bar is implanted on the old concrete building, and the corresponding casing is located in the new concrete building, thereby connecting New and old concrete structures, as well as shear bars can be moved in the casing, can be used as expansion joints under shear and temperature changes, and the waterproof unit stops the water belt across the old and new concrete structures, and is fully waterproof, and The clamping and fixing of the L-shaped stainless steel sheet can reinforce the pull-out force of the water stop belt, ensuring that the water stop belt can play a waterproof function between the new and old concrete structures, so the waterproof and shear resistance of the new and old concrete building of the present invention The expansion joint structure and construction method make the design of the expansion joint of the joint between the new and old concrete structures have excellent waterproofness and shear resistance, reduce the adverse effects of the site subsidence caused by the new concrete building on the old concrete building, and then enhance the structure. The stability of the joint.

Please refer to the first to third figures, which is a preferred embodiment of the waterproof and shear-resistant expansion joint structure of the old and new concrete structures of the present invention, which is disposed between the old concrete building (40) and the new concrete building (50). It comprises at least one anti-shear unit (10), at least one waterproof unit (20) and a buffer layer (30).

The shearing unit (10) comprises a shearing rod (11) and a hollow sleeve (12). One end of the shearing rod (11) is implanted in the old concrete building (40), and the other end is extended. In the corresponding casing (12), the casing (12) is poured into the new concrete structure (50), and the inner wall surface of the casing (12) can be coated with butter. A lubricating oil layer is formed, and the shearing rod (11) can move in the corresponding casing (12), and can be used as a stretching buffer under the shear resistance and temperature change.

The waterproof unit (20) is disposed at the junction of the new and old concrete structures (50, 40) and is located on one side of the shear unit (10), and the waterproof unit (20) includes a waterstop (21), one end of the water stop belt (21) extends into the groove (41) of the old concrete structure (40), and an adhesive is filled between the water stop belt (21) and the old concrete structure (40) to form Filling the layer (22) and fixing the waterstop (21) to the old concrete structure, the other end of the waterstop (21) extending into the new concrete building (50) by pouring, and the old concrete building (40) two pairs of symmetrical L-shaped stainless steel sheets (23) are arranged, the L-shaped stainless steel sheets (23) form a fixed section (231) and a clamping section (232), and the fixing section (231) is provided by an expansion screw (24) and locked on the old concrete building (40), the clamping section (232) of the two symmetrical L-shaped stainless steel sheets (23) is oppositely held to the water stop belt of the old concrete building (40) (21) And locking the clamping section (232) with the water stop strap (21) by means of a plurality of locking fasteners (25), the locking fasteners (25) comprising a bolt (26) and a nut (27), and The adjacent lock fastener (25) is locked by staggered spacing of bolts (26) and nuts (27). (As shown in FIG. Second), the present invention, a water stop (21) of the preferred embodiment may be a flat layout water stop (21).

The buffer layer (30) is disposed between the old concrete structure (40) and the new concrete structure (50), wherein the buffer layer (30) may be a layered member in which the expanded polystyrene sheets are joined together.

Referring to the fourth figure, the construction method of the waterproof and shear-resistant expansion joint structure of the new and old concrete building of the present invention includes the grooving operation, the waterproof operation, the shearing operation and the filling operation, wherein the old concrete building is prior to 40) A groove (41) is formed on the joint surface of the new concrete structure (50), and one end of the water stop belt (21) extends into the groove (41) to fill the groove (41) with the adhesive as For caulking, the groove (41) can have a depth of 3 to 5 cm and a width of 2 to 3 cm. The fixed section (231) of the two-symmetric L-shaped stainless steel piece (23) is extended by an expansion screw (24). The locking section (232) is clamped to the joint surface of the old concrete building (40), and the water stopping belt (21) is clamped, and then locked by the fasteners (25), the water stopping belt (21) One end of the old concrete building (40) is poured into the new concrete building (50), and one end of the shearing rod (11) of the shearing unit (10) is implanted into the old concrete building (40), corresponding to The sleeve (12) is cast into the new concrete structure (50), and a shear rod (11) is provided, wherein the inner wall surface of the sleeve (12) can be coated with lubricating oil to form a lubricating layer. The shear rod (11) can be smoothly moved in the casing (12), and a buffer layer (30) is filled between the joint surface of the old concrete building (40) and the new concrete building (50).

In summary, the waterproof and shear-resistant expansion joint structure and construction method of the new and old concrete structures of the present invention can be applied to the interface of new and old concrete structures (50, 40), such as: building-type buildings, blocks Earth wall, bridge, underground driveway of the building, etc. In the shearing unit (10), the shear bar (11) can be moved in the casing (12) and can be used as shear resistance and temperature change. The expansion joint exerts the effect of shear resistance. The waterproof unit (20) stops the water belt (21) across the new and old concrete structures (50, 40) and is fixed by the L-shaped stainless steel sheet (23). Reinforce the pull-out force of the waterstop (21) and increase the anchoring force of the waterstop (21) in the old concrete building (40) to ensure that the waterstop (21) can be used for new and old concrete structures (50) 40) can play a good waterproof function, so the new and old concrete building of the present invention is connected with the waterproof anti-shear expansion joint The construction method and construction method make the expansion joint structure of the new and old concrete building (50, 40) have excellent waterproofness and shear resistance, and improve the site subsidence caused by the new concrete building (50) against the old concrete building ( 40) The adverse effects caused by the joint structure of new and old concrete structures (50, 40) are more stable and safe.

(10)‧‧‧Shear unit

(11)‧‧‧ shear bars

(12)‧‧‧ casing

(20)‧‧‧Waterproof unit

(21) ‧ ‧ water stop

(22)‧‧‧Seam layer

(23)‧‧‧L type stainless steel sheet

(231) ‧ ‧ fixed section

(232)‧‧‧Clamping section

(24)‧‧‧Expansion screws

(25)‧‧‧Lock Firmware

(26)‧‧‧ bolts

(27)‧‧‧ Nuts

(30) ‧‧‧buffer layer

(40) ‧‧‧Old concrete buildings

(41) ‧ ‧ gully

(50) ‧‧‧New concrete structures

The first figure is a perspective exploded view of a preferred embodiment of the waterproof anti-shear expansion joint structure of the new and old concrete structures of the present invention.

The second figure is a schematic top plan view of a preferred embodiment of a waterproof anti-shear expansion joint structure of the new and old concrete structures of the present invention.

The third figure is a partial side view of a preferred embodiment of a preferred embodiment of the waterproof anti-shear expansion joint structure of the new and old concrete structures of the present invention.

The fourth figure is a schematic diagram of the construction process of the construction method of the waterproof anti-shear expansion joint structure of the new and old concrete structures.

(10). . . Shear unit

(11). . . Shear bar

(12). . . casing

(20). . . Waterproof unit

(twenty one). . . Water stop

(twenty two). . . Caulking layer

(twenty three). . . L-shaped stainless steel sheet

(231). . . Fixed section

(232). . . Clamping section

(twenty four). . . Expansion screw

(40). . . Old concrete building

(41). . . Groove

(50). . . New concrete building

Claims (8)

A waterproof and shear-resistant expansion joint structure of a new and old concrete structure, which is disposed between an old concrete building and a new concrete building, comprising: at least one shearing unit, wherein the shearing unit comprises a planted old concrete a shear bar on the building, and a casing cast into the new concrete structure, the casing provides the shear bar; the at least one waterproof unit is attached to one side of the shearing unit and includes There is a water stop belt, and one end of the water stop belt is disposed in the groove of the old concrete structure, and an adhesive is filled between the water stop belt and the old concrete structure to form a caulking layer, and the water stop belt extends into the new end. In the concrete building, the L-shaped stainless steel piece symmetrically placed on the old concrete building is used to clamp and fix the water stop belt protruding from the old concrete building; and a buffer layer is set between the old concrete building and the new concrete building . The waterproof anti-shear expansion joint structure of the new and old concrete structure as described in claim 1, wherein the sleeve is a hollow member, and the inner wall surface is coated with a lubricating oil layer. For example, the waterproof and shear-resistant expansion joint structure of the new and old concrete structures as described in claim 1 of the patent scope, wherein the L-shaped stainless steel sheets are fixed on the old concrete building with expansion screws. The waterproof and shear-resistant expansion joint structure of the new and old concrete structures as described in claim 2, wherein the L-shaped stainless steel sheets are fixed on the old concrete building by expansion screws. The waterproof anti-shear expansion joint structure of the new and old concrete structure according to any one of claims 1 to 4, wherein the water stop belt is a lithographic water stop belt. The waterproof anti-shear expansion joint structure of the new and old concrete structure according to any one of claims 1 to 4, wherein the waterproof unit is provided with a plurality of fasteners extending into the symmetrical L-shaped stainless steel. The sheet and the clamped waterstop, the fasteners include a bolt and a matching nut, and the adjacent fasteners are arranged at a staggered interval by bolts and nuts. A construction method for waterproofing and shear-resistant expansion joint structure of new and old concrete structures, comprising: grooving operation, cutting a groove before the joint surface of the old concrete building; waterproofing operation, putting one end of the water stop belt into the concave In the ditch, fill the adhesive and fill the joint, and then fix the symmetrical L-shaped stainless steel piece to the old concrete building with expansion screws, and clamp the fixed water stop belt, and the water stop tape is poured on the new concrete building; In operation, the shearing rod of the shearing unit is implanted into the old concrete building at one end, the corresponding casing is inserted into the new concrete building, and the shearing rod is inserted into the joint; and the filling operation is performed to connect the old concrete building with the new concrete building. Filling between the faces forms a buffer layer. The construction method of the waterproof anti-shear expansion joint structure of the new and old concrete structures as described in claim 7 of the patent application, wherein in the shearing operation, the inner wall surface of the sleeve is coated with a layer of lubricating oil to form a lubricating oil layer. .