CN108316651A - A kind of Screw arbor with nut at both-ends double-walled type assembled casing and construction method - Google Patents

Abstract

The invention discloses a double-wall combined sleeve for a pull screw, which comprises an inner sleeve set on the pull screw and an outer sleeve set on the inner sleeve, the outer wall of the inner sleeve and the inner wall of the outer sleeve are A first annular cavity is formed between them, and a second annular cavity is formed between the cylindrical surface of the pull screw and the inner wall of the inner casing; the invention also discloses a construction method, including: 1. Assembling N groups of pull pieces; 2. Support the first formwork and the second formwork; 3. Reinforce the first formwork and the second formwork; 4. Pour concrete and form the concrete wall; 5. Remove the first formwork and the second formwork, and take out the pull screw; 6. Conservation of concrete walls. The double-wall combined casing of the present invention has strong deformation resistance, and the pull screws can all be taken out from the concrete wall, which can realize the repeated use of the pull screws. The construction method of the present invention simplifies the construction process and saves labor and labor. The material cost is reduced, and the construction efficiency is improved.

Description

A kind of double-wall composite casing for pull screw and its construction method

technical field

The invention belongs to the technical field of building construction, and in particular relates to a double-wall composite casing for a pull screw and a construction method.

Background technique

At present, with the diversification and comprehensive development of building functions and certain special requirements, large-section columns, shear walls, structural beams, and equipment foundations are common in the design of concrete structures. During the reinforcement process of structural construction templates, traditional And the current general practice is to pull the single-layer tube on the formwork to pull the screw coat. When the formwork pulls the single-layer pipe of the pull screw jacket, the following defects often occur: 1. During the structural concrete pouring process, the rigidity and strength of the single-layer pipe are not enough to withstand the impact force, pressure and other external forces of the concrete, which is prone to occur Deformation and destruction lead to the inability of the formwork to recycle the pulling screw. 2. Formwork positioning ribs need to be set during the formwork reinforcement process. After the formwork is removed, the single-layer pipes that protrude from the structural surface need to be manually cut. During the concrete pouring process, the surroundings of the single-layer pipes are prone to quality defects such as grout leakage, poor vibration, and pockmarks. , affecting the perceived quality of concrete. 3. During the construction process, some unavoidable safety protection and other measures will be incurred, which will have a certain impact on the cost. Therefore, in order to overcome the above defects, a double-walled combined casing and construction method for the pull screw should be proposed.

Contents of the invention

The technical problem to be solved by the present invention is to provide a double-walled combined casing and construction method for the pull screw in view of the deficiencies in the above-mentioned prior art, which has a simple structure, reasonable design, and strong deformation resistance. After being combined with the second formwork, all the tensioning screws can be taken out from the concrete wall, which can realize the repeated use of the tensioning screws, save energy, and effectively reduce production costs.

In order to solve the above-mentioned technical problems, the present invention provides a double-walled combined sleeve for the pull screw, the adopted technical solution is: a double-wall combined sleeve for the pull screw, which is characterized in that: Pull the inner sleeve on the screw rod and the outer sleeve sleeved on the inner sleeve, the two ends of the inner sleeve are sleeved with the first annular rubber gasket, the outer wall of the inner sleeve and the inner wall of the outer sleeve A first annular cavity is formed, and a second annular rubber gasket is set on both ends of the pull screw, and a second annular cavity is formed between the cylindrical surface of the pull screw and the inner wall of the inner sleeve, and the outer sleeve Both ends are provided with waterproof plugs.

The above-mentioned double-wall composite sleeve for the pull screw is characterized in that: lock nuts and elastic washers are installed at both ends of the pull screw.

The present invention also provides a construction method in which the pull screws in the concrete wall can be fully recovered. The cutting equipment cuts the pull screw and the single-layer casing exposed outside the concrete wall, which simplifies the construction process, and is characterized in that the method includes the following steps:

Step 1. Assemble N sets of paired pullers:

Each set of the pair of pull members includes a pair of pull screws and a double-walled combined sleeve sleeved on the pair of pull screws, wherein, N is a positive integer greater than 2;

Step 2, setting up the first formwork and the second formwork:

First, the first formwork is supported, and N sets of said pair of tension members are installed horizontally on the inner side of the first formwork. One end of one end passes through the first template, and then the second template is supported, so that the other end of the pull screw in the N groups of the pull members passes through the second template, and the inner surfaces of the first template and the second template are close to each other. the two end faces of the outer casing;

Step 3, Reinforce the first formwork and the second formwork:

Vertical main keels and transverse secondary keels are arranged on the outside of the first formwork and the second formwork, and bolts and elastic washers are used to fasten the opposite tension screws of each set of opposite tension members to the end faces of the main keels, Realize the reinforcement of the first formwork and the second formwork;

Step 4, pouring concrete and forming the concrete wall;

Step 5. Remove the first template and the second template, and take out the pull screw:

First, the first formwork and the second formwork on both sides of the concrete wall are removed, and then, the tension screws of each set of the tension members in the concrete wall are taken out one by one, and the inner sleeves of each set of the tension elements are The pipe is taken out simultaneously with the pull screw of the pull piece, and the outer casing and waterproof plug of each set of pull pieces are embedded in the concrete wall;

Step six, maintaining the concrete wall.

The above-mentioned construction method is characterized in that: in step 1, assembling N sets of said pair of pull parts, wherein, the specific process of assembling each set of said pair of pull parts includes:

Step 101, apply lubricating oil on the outer surface of the pull screw;

Step 102 , insert the split screw into the inner sleeve, and put second annular rubber gaskets on both ends of the split screw, so that a second annular cavity is formed between the cylindrical surface of the split screw and the inner wall of the inner sleeve.

Compared with the prior art, the present invention has the following advantages:

1. The double-wall combined casing provided by the present invention is provided with an outer casing on the inner casing, and the two ends of the inner casing are equipped with first annular rubber gaskets, so that the outer wall of the inner casing is in contact with the outer casing. The first annular cavity is formed between the inner walls. In actual use, the inner casing is set on the pull screw, and the two ends of the pull screw are fitted with a second annular rubber gasket, so that the cylindrical surface of the pull screw is in line with the said pull screw. A second annular cavity is formed between the inner walls of the inner casing. Therefore, during the process of pouring concrete and forming the concrete wall, the outer casing is elastically deformed due to the extrusion of the concrete. When the maximum radial deformation of the outer casing is greater than the first When the ring width of an annular cavity is wide, the inner casing starts to support the outer casing. At this time, the inner casing and the outer casing form a common force-bearing body. Therefore, the pressure of the concrete acting on the outer surface of the outer casing is determined by The inner casing and the outer casing work together to fight against each other. Compared with the single-layer casing in the prior art, it has better anti-deformation ability. After the first formwork and the second formwork are removed, the tension screws can all be taken out from the concrete wall , can realize the repeated use of the pulling screw, save energy, and effectively reduce the production cost.

2. The outer casing in the double-wall composite casing provided by the present invention can be used as a positioning rib between the first formwork and the second formwork. Supporting and setting ribs can not only save materials, but also improve the visual quality of concrete walls.

3. The double-wall composite casing provided by the present invention is provided with waterproof plugs at both ends of the outer casing. The waterproof plugs are water-swellable rubber plugs. During the concrete pouring process, the water-swellable rubber plugs can Preventing the occurrence of slurry leakage at both ends of the outer casing can avoid quality problems such as poor vibration and pockmarks around the outer casing, and the use effect is good.

4. In the construction method provided by the present invention, the double-wall composite casing is used to fit the pull screw on the double-wall composite casing. The double-wall composite casing has good deformation resistance and is convenient for the pull screw in the concrete wall. And the inner casing is taken out, no need to use cutting equipment to cut the double-layered screw and the single-layer casing exposed outside the concrete wall, which saves manpower and material resources, simplifies the construction process, and enables the full recovery of the double-sided screw. Use, use effect is good.

To sum up, the double-wall composite casing of the present invention has simple structure, reasonable design, and strong deformation resistance. The repeated use of the pull screw saves energy and effectively reduces the production cost. The construction method of the present invention does not need to support a plurality of positioning ribs between the first template and the second template, and does not need to use cutting equipment to The split screw and single-layer casing outside the concrete wall are cut, and the split screw inside the concrete wall can be fully recycled, which simplifies the construction process, saves labor and material costs, and improves construction efficiency.

The present invention will be described in further detail below with reference to the accompanying drawings and examples.

Description of drawings

Fig. 1 is a schematic diagram of the connection relationship between the double-wall composite casing and the pull screw of the present invention.

Fig. 2 is a schematic view of the use state of the double-wall composite sleeve of the present invention.

Fig. 3 is a flow chart of the construction method of the present invention.

Explanation of reference signs:

1—pull screw; 2—inner casing; 3—outer casing;

4—the first annular chamber; 5—the second annular chamber; 6—the first annular rubber gasket;

7—the second annular rubber gasket; 8—waterproof plug; 9—elastic gasket;

10—nut; 11—the first template; 12—the second template;

13—main keel; 14—secondary keel; 15—concrete wall.

Detailed ways

As shown in Figure 1, the present invention provides a double-wall composite sleeve for pull screw, including an inner sleeve 2 set on the pull screw 1 and an outer sleeve 3 set on the inner sleeve 2 , both ends of the inner casing 2 are fitted with a first annular rubber gasket 6, a first annular cavity 4 is formed between the outer wall of the inner casing 2 and the inner wall of the outer casing 3, and the two ends of the pull screw 1 The second annular rubber gasket 7 is set on both sides, and the second annular cavity 5 is formed between the cylindrical surface of the pull screw 1 and the inner wall of the inner casing 2, and the two ends of the outer casing 3 are provided with waterproof plugs. head 8.

As shown in Figures 1 and 2, in this embodiment, the inner sleeve 2 is fitted with an outer sleeve 3, and both ends of the inner sleeve 2 are fitted with a first annular rubber gasket 6, so that the inner sleeve 2 A first annular cavity 4 is formed between the outer wall of the outer casing and the inner wall of the outer casing 3. In actual use, the inner casing 2 is set on the pull screw 1, and a second annular rubber gasket is set at both ends of the pull screw 1. 7. The second annular cavity 5 is formed between the cylindrical surface of the pull screw 1 and the inner wall of the inner casing 2. During the process of pouring concrete and forming the concrete wall 15, the outer casing 3 is squeezed by the concrete Elastic deformation occurs along the radial direction. When the maximum radial deformation of the outer sleeve 3 is greater than the ring width of the first annular cavity 4, the inner sleeve 2 starts to support the outer sleeve 3. At this time, the inner sleeve 2 2 and the outer casing 3 form a common stress body, therefore, the extrusion force of the concrete acting on the outer casing 3 is jointly resisted by the inner casing 2 and the outer casing 3, compared with the single-layer casing in the prior art, The double-wall composite casing has better anti-deformation ability.

In this embodiment, under the extrusion of the outer sleeve 3, the inner sleeve 2 elastically deforms in the radial direction, and the second annular cavity 5 provides a deformation space for the elastic deformation of the inner sleeve 2, And the second annular rubber gasket 7 can absorb and relieve the extrusion force and impact force transmitted by the inner sleeve 2 to the pulling screw 1, when the maximum radial deformation of the inner sleeve 2 is less than the ring width of the second annular cavity 5 , the extrusion force and impact force received by the inner casing 2 will not be transmitted to the pull screw 1, which can protect the pull screw 1, so that the pull screw 1 will not be deformed, so as to ensure that the pull screw 1 is free from the concrete It should be taken out from the wall 15; it should be noted that: when the maximum radial deformation of the inner sleeve 2 is greater than or equal to the ring width of the second annular cavity 5, the inner surface of the inner sleeve 2 and the outer surface of the pulling screw 1 Clinging, so that the pull screw 1 is tightly wrapped in the concrete, and cannot be taken out from the concrete wall 15.

In this embodiment, the outer casing 3 can also be used as a positioning rib between the first formwork 11 and the second formwork 12. In the actual construction process, there is no need to support and position between the first formwork 11 and the second formwork 12. The ribs can not only save materials, but also improve the visual quality of the concrete wall 15 .

In this embodiment, waterproof plugs 8 are provided at both ends of the outer casing 3, and the waterproof plugs 8 are water-swellable rubber plugs. During the concrete pouring process, the water-swellable rubber plugs can prevent the outer casing 3 from Occurrence of slurry leakage at both ends can avoid quality problems such as poor vibration and pitted surface around the outer casing 3, and the use effect is good.

In this embodiment, lock nuts 9 and elastic washers 10 are installed at both ends of the pull screw 1 .

As shown in Figure 3, a construction method, the method comprises the following steps:

Step 1. Assemble N sets of paired pullers:

Each set of the pair of pulling parts includes a pair of pulling screws 1 and a double-walled combined sleeve sleeved on the pair of pulling screws 1, wherein N is a positive integer greater than 2;

In this embodiment, by putting the double-walled combined casing on the pull screw 1 to form the pull parts, when forming each concrete wall 15, the number of the pull parts required is N groups, so it is necessary to Before setting up the first formwork 11 and the second formwork 12, the assembly of N opposite pull pieces provides preparations for setting up the first formwork 11 and the second formwork 12 in step 2, which can save time and cost and improve construction efficiency.

Step 2, setting up the first formwork and the second formwork:

First, the first formwork 11 is set up, and N sets of the pair of pull pieces are installed horizontally on the inner side of the first formwork 11, and the N sets of the pair of pull pieces are arranged in multiple rows and columns, so that the pairs of the N sets of the pair of pull pieces One end of the pull screw 1 passes through the first template 11, and then supports the second template 12, so that the other end of the pull screw 1 in the pair of pull members in the N groups passes through the second template 12, and the first template 11 and the second template The inner surface of the second template 12 is close to the two end surfaces of the outer sleeve 3;

In this embodiment, the inner surfaces of the first formwork 11 and the second formwork 12 are closely attached to the two end faces of the outer sleeve 3. Compared with the existing construction technology, there is no need to install the first formwork 11 and the second formwork. A plurality of positioning ribs are supported between 12, which simplifies the construction process, saves labor and material costs, and improves construction efficiency.

Step 3, Reinforce the first formwork and the second formwork:

The vertical main keel 13 and the transverse sub-keel 14 are arranged on the outer sides of the first formwork 11 and the second formwork 12, and bolts 9 and elastic washers 10 are used to fasten the pair of tension screws 1 of each set of tension members. On the end face of the main keel 13, the reinforcement of the first template 11 and the second template 12 is realized;

Step 4, pouring concrete, forming the concrete wall 15;

Step 5. Remove the first template and the second template, and take out the pull screw:

First, the first formwork 11 and the second formwork 12 on both sides of the concrete wall 15 are removed, then, the pair of tension screws 1 of each group of the pair of tension members in the concrete wall 15 are taken out one by one, and each group of the pair of tension members The inner sleeve 2 of the puller is taken out simultaneously with the puller screw 1 of the puller, and the outer sleeve 3 and waterproof plug 8 of each set of the puller are embedded in the concrete wall 15;

In the existing construction technology, the recovery of the pull screw 1 is realized by putting a single-layer casing on the pull screw 1. However, in the actual use process, the single-layer casing has poor deformation resistance, which causes the pull screw 1 to fall from the concrete. The wall 15 cannot be taken out or the recovery rate of the pull screw 1 is low. Therefore, the pull screw 1 embedded in the concrete wall 15 and the single-layer casing that cannot be taken out are removed in the first formwork 11 and the second formwork 12. Afterwards, it is necessary to use cutting equipment to cut the pull screw 1 and the single-layer casing exposed outside the concrete wall 15, which consumes a lot of manpower and material resources;

In this embodiment, the double-wall composite sleeve is installed on the pull screw 1, and the double-wall composite sleeve has better deformation resistance, which is convenient for the pull screw 1 and the inner sleeve 2 in the concrete wall 15. Take it out, so that the pull screw 1 can be fully recovered and used repeatedly, effectively reducing the construction cost.

Step six, maintaining the concrete wall.

In this embodiment, in step 1, N groups of the pair of pulls are assembled, wherein the specific process of assembling each set of the pair of pulls includes:

Step 101, apply lubricating oil on the outer surface of the pull screw 1;

In actual use, by smearing lubricating oil on the outer surface of the pull screw 1, the pull screw 1 and the inner sleeve 2 can be lubricated, which is not only convenient for installation, but also convenient for the pull screw 1 and the inner sleeve 2 to be removed from the concrete. Extract out in body of wall 15.

Step 102, insert the pull screw 1 into the inner sleeve 2, and put the second annular rubber gasket 7 on both ends of the pull screw 1, so that a second ring is formed between the cylindrical surface of the pull screw 1 and the inner wall of the inner sleeve 2. Annular chamber 5.

In this embodiment, the second annular cavity 5 provides a deformation space for the elastic deformation of the inner sleeve 2, and the second annular rubber gasket 7 can absorb and relieve the extrusion force and impact transmitted from the inner sleeve 2 to the pulling screw 1 Force, when the maximum radial deformation of the inner sleeve 2 is less than the ring width of the second annular cavity 5, the extrusion force and impact force on the inner sleeve 2 will not be transmitted to the pull screw 1, which can protect the pair Pulling the screw rod 1 prevents deformation of the pulling screw rod 1 , thereby ensuring that the pulling screw rod 1 is taken out from the concrete wall 15 .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to the technical aspects of the present invention. within the scope of protection of the scheme.

Claims (4)

1. A double-walled combined sleeve for the pull screw, characterized in that: it includes an inner sleeve (2) sleeved on the pull screw (1) and an outer sleeve sleeved on the inner sleeve (2) pipe (3), both ends of the inner casing (2) are fitted with a first annular rubber gasket (6), and a first Annular cavity (4), the two ends of the pull screw (1) are fitted with a second annular rubber gasket (7), the cylindrical surface of the pull screw (1) and the inner wall of the inner sleeve (2) A second annular cavity (5) is formed therebetween, and waterproof plugs (8) are provided at both ends of the outer casing (3). 2. According to claim 1, a double-walled combined sleeve for the pull screw, characterized in that: lock nuts (9) and elastic washers are installed at both ends of the pull screw (1) (10). 3. A method of utilizing the double-walled composite casing as claimed in claim 2 to carry out concrete wall construction, characterized in that: the method comprises: Step 1. Assemble N sets of paired pullers: Each set of the pair of pull members includes a pair of pull screws (1) and a double-walled combined sleeve sleeved on the pair of pull screws (1), wherein, N is a positive integer greater than 2; Step 2, setting up the first formwork and the second formwork: First, the first formwork (11) is supported, and N sets of said pair of pullers are installed horizontally on the inner side of the first template (11). One end of the pull screw (1) in the pull piece passes through the first template (11), and then supports the second template (12), so that the other end of the pull screw (1) in the N groups of pull pieces passes through The second formwork (12), and the inner surfaces of the first formwork (11) and the second formwork (12) are close to the two end surfaces of the outer casing (3); Step 3, Reinforce the first formwork and the second formwork: Vertical main keel (13) and transverse sub-keel (14) are set on the outside of first formwork (11) and second formwork (12), and utilize bolt (9) and elastic washer (10) to connect each group The opposite tension screw (1) of the tension member is fastened on the end surface of the main keel (13), realizing the reinforcement of the first formwork (11) and the second formwork (12); Step 4, pouring concrete and forming the concrete wall; Step 5. Remove the first template and the second template, and take out the pull screw: First, the first formwork (11) and the second formwork (12) on both sides of the concrete wall (15) are removed, and then, the tension screws (1) of each group of the tension members in the concrete wall (15) ) are taken out one by one, the inner casing (2) of each group of said pair of pull parts is taken out simultaneously with the pair of pull screws (1) of said pair of pull parts, and the outer sleeve (3) of each group of said pair of pull parts and a waterproof plug (8) are embedded in the concrete wall (15); Step six, maintaining the concrete wall. 4. According to a kind of construction method described in claim 3, it is characterized in that: in step 1, assembling N groups of described pair of pull parts, wherein, the specific process of assembling each group of described pair of pull parts includes: Step 101, apply lubricating oil on the outer surface of the pull screw (1); Step 102, insert the pull screw (1) into the inner sleeve (2), put the second annular rubber gasket (7) on both ends of the pull screw (1), make the cylindrical surface of the pull screw (1) and the inner A second annular cavity (5) is formed between the inner walls of the casing (2).