CN106092729A - Concrete sandwich wallboard sockets part tension pull out force field test apparatus and method - Google Patents

Abstract

The invention discloses an on-site inspection device and method for the pull-out force of a concrete sandwich wall panel tension joint, which belongs to the inspection device and method. Loading device, washer and nut, the adapter is provided with an inner hole, and the outer surface is provided with an outer wire of the adapter, the adapter is connected to the right end of the wall panel pull connector, and the left end of the wall panel pull connector is set on the inner leaf wall Inside, the left end of the pull rod is provided with an inner wire, and the right end is provided with an outer wire of the pull rod. The adapter is connected to the pull rod. The pull rod is sequentially inserted with a reaction force support device, a through-core loading device and a washer, and then tightened by a nut. The invention has the comprehensive tensile properties of testing concrete strength, occlusal binding force, frictional binding force and the tensile strength of the connecting piece material, so as to ensure that the joints of the outer leaf wallboard will not be damaged under the maximum horizontal tensile combined action of horizontal earthquake, wind load, etc. Pulling out or breaking and other damages, ensuring the safety of the connection of the wall fasteners, etc.

Description

On-site inspection device and method for tensile strength of concrete sandwich wall panel tension joints

technical field

The invention relates to an inspection device and method, in particular to an on-site inspection device and method for the pull-out force of a concrete sandwich wall panel tension connector.

Background technique

The prefabricated concrete structure has the form of frame structure, shear wall structure and frame-shear wall structure. Since the shear wall structure has no exposed beams and columns, the indoor space is large, and it is easy to arrange furniture, which is suitable for residential buildings. It is currently widely used in residential buildings.

The exterior wall of the prefabricated shear wall structure generally adopts concrete sandwich wall panels (prefabricated sandwich insulation exterior wall panels). The connector bears the self-weight, earthquake load, wind load, etc. from the outer leaf wall panel. Once the transmitted load is greater than the bearing capacity of the wall panel connector, resulting in damage to the connector, it will cause the entire outer leaf wall panel to fall off. Opening, falling, general residential buildings are densely populated in the community, and most of the buildings currently under construction are high-rise buildings. Once the outer leaf wall panels are damaged and disengaged from the high-altitude, causing damage to personnel and property, the consequences will be unimaginable. For this reason, it is necessary to ensure that the construction quality of the wall panel tension members meets the design requirements, and the wall plate tension joints will not be damaged due to the self-weight, earthquake load, wind load, etc. social influence.

Specification 4.2.7 of the "Technical Regulations for Prefabricated Concrete Structures" JGJ1-2014: It is very important to ensure the performance of the anchors of the inner and outer leaf panels of the sandwich exterior wall panels. At present, the tension joints of the inner and outer leaf wall panels are mostly made of high-strength glass fiber in the United States, while stainless steel wires are used to make metal tension joints in Europe. Due to the lack of beneficiary product standards in my country at present, the regulations only refer to relevant materials in the United States and Europe to qualitatively put forward the basic requirements for pull connectors. my country's construction industry product standards for prefabricated sandwich exterior wall panels and inner and outer leaf wall panels are being compiled. After the relevant standards are promulgated, they should be implemented in accordance with relevant standards.

At present, the most similar specifications are only the tensile and shear strength requirements and inspection methods of the material of the wallboard tension member itself, and when the tension member is pulled out from the wallboard, the failure form is concrete cone failure or tension connection. The piece is pulled out by sliding (the concrete does not have sufficient bite or frictional restraint), and its tensile strength is much less than that of the material itself.

Considering the bearing capacity according to the tensile strength of the material itself, the influence of the concrete strength, occlusal restraint force and frictional restraint force of the inner leaf wall panel is ignored, and the control method is extremely unsafe.

Since this type of building has been used in a certain number of applications, various quality supervision departments require on-site inspection of the pull-out resistance of prefabricated concrete sandwich wall panels. Therefore, it is necessary to invent a prefabricated concrete sandwich wall panel. The device and method for on-site testing of the pull-out force of the tie piece enable the pull-out force test of the wallboard tie piece to be carried out on site.

Contents of the invention

The technical task of the present invention is to provide an on-site inspection device and method for the pull-out force of concrete sandwich wall panel tension joints in view of the above-mentioned deficiencies in the prior art. The method can test the comprehensive tensile properties of concrete strength, occlusal restraint force, frictional restraint force, and the tensile strength of the connector material, so as to ensure that the outer leaf wall panels will not produce tension when the outer leaf wall panels are pulled down under the maximum horizontal tensile combined effects such as horizontal earthquakes and wind loads. The characteristics of ensuring the safety of the connection of the wall pull connectors in case of damage such as cracking or breaking.

The technical solution adopted by the present invention to solve its technical problems is:

On-site inspection device for the pull-out force of concrete sandwich wall panel tension joints, including adapters, tie rods, reaction force support devices, force measurement value display devices, through-hole loading devices, washers and nuts, the adapters An inner hole is provided, and an outer wire of an adapter is provided on the outer surface. The adapter is connected to the right end of the wall panel pull connector, and the right end of the wall panel pull connector is sleeved in the inner hole of the adapter, and the wall panel pull connection The left end of the piece is arranged in the inner leaf wall, the left end of the pull rod is provided with an inner wire, and the right end is provided with an outer wire of the pull rod. The wire is matched with the inner wire at the left end of the pull rod, and the pull rod is sequentially inserted into a reaction support device, a through-type loading device and a washer, and then tightened by a nut, and the left end of the reaction support device leans against the inner leaf wall On the body, the force-measuring value display device is set on the through-hole loading device.

Epoxy mortar is arranged in the inner hole between the adapter piece and the wallboard pull-joint piece.

The reaction support device includes a connecting plate and a supporting plate, and the supporting plates include three, which are evenly arranged on the left side of the connecting plate, and a through hole is provided in the middle of the connecting plate, and the tie rod passes through the connecting plate. through holes on the board.

The middle part of the right side of the connecting plate is provided with a positioning groove matched with the through-type loading device, and the through-type loading device is located in the positioning groove.

The method for inspecting by an on-site inspection device for the pull-out force of a concrete sandwich wall panel tension connector comprises the following steps;

(1) Select the inner leaf wall panel as the installed wall panel tension connector on site and confirm that the inner leaf wall panel has reached the design strength;

(2) Put the adapter piece into the right end of the wallboard pull joint piece, insert the depth to the right end surface of the pressure plate of the adapter piece, then insert epoxy mortar into the inner hole of the adapter piece and fix it, and wait for more than 24 hours Make the strength of epoxy mortar meet the test requirements;

(3) Screw the inner thread at the left end of the pull rod to the outer thread of the adapter piece, screw in the threaded buckle no less than 10 threads, and then insert the reaction force support device, the through-center loading device and the Washer, and screw on the nut, tighten the nut, and control its force value to 0.1kN;

(4) After checking that the connections are complete and correct, set the force measurement value display device to zero, and then load at an even speed by turning the nut, so that the pull rod drives the adapter and the wall panel tension piece to move to the right until the wall panel tension piece is pull out damage;

(5) Record the inspection data, then disassemble the parts of the on-site inspection device, clean the epoxy mortar in the adapter by heating, and then clean and wipe the other parts to prepare for the next inspection.

Compared with the prior art, the on-site inspection device and method for the pull-out force of concrete sandwich wallboard tension joints of the present invention have the following outstanding beneficial effects: inspection of concrete strength, occlusal binding force, frictional binding force and tensile strength of connecting piece materials and other comprehensive tensile properties, to ensure that the outer leaf wall panels will not be pulled out or broken under the maximum horizontal tensile combination of horizontal earthquakes and wind loads, and ensure the safety of the connection of the wall tension members.

Description of drawings

Accompanying drawing 1 is the schematic diagram of the front view structure of the on-site inspection device for pull-out resistance of concrete sandwich wallboard tension joints;

Accompanying drawing 2 is the exploded view shown in Figure 1;

Accompanying drawing 3 is the front view of wallboard pull connector;

Accompanying drawing 4 is the top view of wallboard pull connector;

Accompanying drawing 5 is the schematic diagram of adapter;

Accompanying drawing 6 is pull bar schematic diagram;

Accompanying drawing 7 is a front view of the counter force support device;

Accompanying drawing 8 is the right side view of counter force supporting device;

Accompanying drawing 9 is the schematic diagram of the connection between the force-measuring value display device and the through-hole loading device;

Explanation of reference numerals: 1, wallboard pull connector, 11, pressure plate, 2, adapter, 21, inner hole, 22, adapter outer wire, 3, pull rod, 31, inner wire, 32, pull rod outer wire , 4, reaction support device, 41, connecting plate, 42, support rod, 43, through hole, 44, positioning groove, 5, force measurement value display device, 6, through the heart type loading device, 7, washer, 8 , nut, 9, the inner leaf wallboard.

detailed description

With reference to the attached drawings, the device and method for on-site testing of the pullout force of the concrete sandwich wall panel tension connector of the present invention will be described in detail below.

The on-site inspection device for the pull-out force of the concrete sandwich wall panel tension joint of the present invention has a structure comprising an adapter 2, a pull rod 3, a reaction force support device 4, a force measurement value display device 5, a through-hole loading device 6, Washer 7 and nut 8, the adapter 2 is provided with an inner hole 21, and the outer surface is provided with an adapter outer wire 22, the adapter 2 is connected to the right end of the wallboard pull connector 1, and the wallboard The right end of the pull connector 1 is set in the inner hole 21 of the adapter 2, the left end of the wall panel pull connector 1 is set in the inner leaf wall panel 9, the left end of the pull rod 3 is provided with an inner wire 31, and the right end is provided with a pull rod outer Wire 32, the adapter 2 is connected to the pull rod 3, the adapter 2 is matched with the inner wire 31 on the left end of the pull rod 3 through the adapter outer wire 22 provided on the outer surface, and the pull rod 3 is sequentially inserted The reaction force support device 4, the through-core loading device 6 and the washer 7 are then tightened by nuts 8, the left end of the reaction force support device 4 rests on the inner leaf wall panel 9, and the force measurement value display device 5 Set on the through-type loading device 6.

Epoxy mortar is arranged in the inner hole 21 between the adapter 2 and the wall panel connecting member 1 .

The reaction support device 4 includes a connecting plate 41 and a supporting rod 42, and the supporting rods 42 include three, which are evenly arranged on the left side of the connecting plate 41, and the middle part of the connecting plate 41 is provided with a through hole 43 , the pull rod 3 passes through the through hole 43 on the connecting plate 41 .

The middle part of the right side of the connecting plate 41 is provided with a positioning groove 44 matched with the through-type loading device 6 , and the through-type loading device 6 is located in the positioning groove 44 .

The method for inspecting by an on-site inspection device for the pull-out force of a concrete sandwich wall panel tension connector comprises the following steps;

(1) Select the inner leaf wall panel 9 as the installed wall panel pull connector 1 on site and confirm that the inner leaf wall panel has reached the design strength;

(2) Put the adapter 2 into the right end of the wall panel pull connector 1, and insert it to the right end of the pressure plate 11 of the adapter 2, and then insert epoxy mortar into the inner hole 21 of the adapter 2 and fix it Well, wait for more than 24 hours to make the strength of the epoxy mortar meet the test requirements;

(3) Screw the inner wire 31 at the left end of the pull rod 3 onto the outer wire 22 of the adapter 2, screw in the threaded buckle for no less than 10 wires, and then insert the reaction support device 4 on the pull rod 3 in sequence, Heart-type loading device 6 and washer 7, and screw on nut 8, tighten the nut 8, and control its force value to 0.1kN;

(4) After checking that all connections are complete and correct, adjust the force measurement value display device 5 to zero, and then load at a uniform speed by turning the nut 8, so that the pull rod 3 drives the adapter 2 and the wall panel pull connector 1 to move to the right to the wall. Plate connector 1 is pulled out and damaged;

(5) Record the inspection data, then disassemble the parts of the on-site inspection device, clean the epoxy mortar in the adapter 2 by heating, then clean and wipe the other parts, and prepare for the next inspection.

The on-site testing device for the pull-out resistance of the concrete sandwich wall panel tension joints of the present invention can test the pull-out resistance of the wall panel tension joints on site, and check the concrete strength, occlusal binding force, frictional binding force and the resistance of the connecting piece material. Comprehensive tensile properties such as tension, to ensure that the outer leaf wall panels will not be pulled out or broken under the maximum horizontal tensile combination of horizontal earthquakes and wind loads, and ensure the safety of the connection of the wall tension members.

The implementation methods listed above are only for understanding the present invention, and are not intended to limit the technical solutions described in the present invention. Those of ordinary skill in the relevant fields can also make various changes on the basis of the technical solutions described in the claims. or deformation, all equivalent changes or deformations shall fall within the protection scope of the claims of the present invention. The parts of the present invention that are not described in detail are known technologies of those skilled in the art.

Claims (5)

1. concrete sandwich wallboard sockets part tension pull out force field test device, it is characterized in that: include adaptor, pull bar, anti- Force supporting device, dynamometry numerical display device, punching loading system, packing ring and nut, described adaptor is provided with endoporus, Outer surface is provided with the outer silk of adaptor, and described adaptor sockets part right-hand member and is connected with wallboard, and wallboard sockets part right-hand member and is placed on In adaptor endoporus, wallboard sockets part left end and is arranged in internal lobe body of wall, and the left end of described pull bar is provided with internal thread, and right-hand member sets Being equipped with the outer silk of pull bar, described adaptor is connected with pull bar, and the outer silk of adaptor that adaptor is arranged by outer surface is left with pull bar The internal thread of end matches, and described pull bar is inserted in counter-force support means, punching loading system and packing ring successively, then passes through Nut screwing clamping, described counter-force support means left end is against on internal lobe body of wall, and described dynamometry numerical display device is arranged on to be worn On core type loading system.

Concrete sandwich wallboard the most according to claim 1 sockets part tension pull out force field test device, it is characterized in that: Described adaptor and wallboard are provided with epoxy resin mortar in socketing the endoporus between part.

Concrete sandwich wallboard the most according to claim 1 sockets part tension pull out force field test device, it is characterized in that: Described counter-force support means includes that connecting plate and gripper shoe, described gripper shoe include 3, is uniformly arranged on a left side for connecting plate On side, the middle part of described connecting plate is provided with through hole, and pull bar is through the through hole on connecting plate.

Concrete sandwich wallboard the most according to claim 3 sockets part tension pull out force field test device, it is characterized in that: The locating slot matched with punching loading system, punching loading system position it is provided with in the middle part of the right flank of described connecting plate In locating slot.

5. utilize arbitrary concrete sandwich wallboard in claim 1 to 4 to socket part tension pull out force field test device to examine The method tested, is characterized in that: comprise the following steps；

(1) on-the-spot selection internal lobe wallboard sockets part for installing wallboard and determines that internal lobe wallboard has reached design strength；(2) will turn Fitting is inserted in wallboard and sockets part right-hand member, is inserted in the degree of depth at the pressing plate right side of adaptor, then fills in adaptor endoporus Epoxy resin mortar also fixes, and quiet marquis more than 24h makes epoxy resin mortar intensity reach test requirements document；

(3) the left end internal thread of pull bar is screwed on the outer silk of adaptor of adaptor, is screwed into screw thread and is not less than 10, exist the most successively It is inserted in counter-force support means, punching loading system and packing ring, and nut of screwing on pull bar, by nut screwing clamping, controls its force value For 0.1kN；

(4), after checking that each connection is the most errorless, dynamometry numerical display device is returned to zero, is then loaded by rotating nut average rate, Make pull bar drive adaptor and wallboard to socket part and move right, socket part to wallboard and be drawn out destruction；

(5) then each for field test device parts are disassembled out by records tests data, by heating by the epoxy in adaptor Mortar is cleaned out, and is then all cleared up by other parts and wiped clean, prepares to check next time.