CN113513015A

CN113513015A - A kind of semi-prefabricated concrete reinforced cage underground continuous wall and construction method

Info

Publication number: CN113513015A
Application number: CN202110892947.8A
Authority: CN
Inventors: 唐咸远; 罗杰; 马杰灵; 郭彬; 陈文杰
Original assignee: Guilin University of Electronic Technology
Current assignee: Guilin University of Electronic Technology
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2021-10-19

Abstract

The invention discloses an underground continuous wall of a semi-prefabricated concrete reinforcement cage and a construction method. The continuous wall is obtained by fixing prefabricated concrete panels on both sides of the reinforcement cage to obtain a semi-prefabricated reinforcement cage, and the adjacent semi-prefabricated reinforcement cages The slot connection is adopted, and it is hoisted into the unit slot after opening and cleaning, and concrete is poured into the steel cage between the concrete panels to form an underground continuous wall. The diaphragm wall is clamped by high-strength concrete on both sides to prevent the deformation of the reinforcement cage during the lifting process; the semi-prefabricated reinforcement cage is connected by a slot, which effectively prevents water leakage and misalignment at the interface; the high-strength concrete used The bearing capacity and impermeability of the diaphragm wall are greatly improved, and the diaphragm wall is used as a part of the foundation and structure of the building; the wall of the diaphragm wall is smooth, and the wall is continuous and flush. It has the advantages of high construction safety, reliable engineering quality, strong impermeability and good economy.

Description

Semi-prefabricated concrete reinforcement cage underground continuous wall and construction method

Technical Field

The invention relates to the technical field of civil engineering construction, in particular to a semi-prefabricated concrete reinforcement cage underground continuous wall and a construction method.

Background

Underground continuous walls are often used as a diaphragm wall and a temporary retaining wall, and are increasingly used as a part of foundations and structures of buildings and as a main structure through years of development and use and technological, equipment and material innovations. The underground continuous wall adopts a grooving machine, under the protection of a guide wall and slurry, a unit groove section is dug along the central axis of the guide wall, after the groove is cleaned, a crane is used for placing a prefabricated reinforcement cage into the unit groove according to the expected position, and concrete is used for pouring to form the unit wall. And sequentially, a continuous reinforced concrete wall can be built underground.

When the steel reinforcement cage is hoisted during the construction of the traditional underground continuous wall, the steel reinforcement cage is easy to deform, the hoisting and installation are difficult, and the construction safety is difficult to guarantee; in order to guarantee the impermeability requirement, waterproof concrete must be poured; the wall is rough and is not suitable for a part of a foundation and a structure, and when the construction geological condition is special, the problems that adjacent wall sections cannot be aligned and water leakage often occur.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides a semi-prefabricated concrete reinforcement cage underground continuous wall and a construction method thereof.

The technical scheme for realizing the purpose of the invention is as follows:

the utility model provides a half prefabricated formula concrete reinforcement cage underground continuous wall, includes the steel reinforcement cage, and the fixed prefabricated super high performance concrete panel of both sides face of steel reinforcement cage obtains half prefabricated formula steel reinforcement cage, and adjacent half prefabricated formula steel reinforcement cage adopts the draw-in groove to connect, in the unit cell after opening and removing the foundation with its hoist and mount, behind the steel reinforcement cage pouring ordinary concrete between the concrete panel of each half prefabricated formula steel reinforcement cage, forms underground continuous wall.

The concrete panel has the compressive strength of more than 150MPa and the impermeability grade of more than or equal to P10.

The clamping groove is an I-shaped clamping groove.

A construction method of a semi-prefabricated high-strength concrete reinforcement cage underground continuous wall comprises the following steps:

1) planning a lead, building a guide wall, and mining a unit groove by using a groover;

2) designing a reinforcement cage and a prefabricated panel according with the size of the unit groove according to the size of the unit groove;

3) the high-strength concrete is adopted, panels are prefabricated in a component factory, and after the concrete panels are formed, the prefabricated panels are fixed on two side surfaces of a reinforcement cage to form a semi-prefabricated reinforcement cage;

4) cleaning the inside of the unit groove, and placing the vertical end face of the prefabricated semi-prefabricated reinforcement cage into the unit groove by a crane along the clamping groove of the end face of the other constructed underground continuous wall, so that the adjacent semi-prefabricated reinforcement cages are connected by the clamping groove, and the position of the semi-prefabricated reinforcement cage is fixed;

5) and after the common concrete is poured into the reinforcement cage between the concrete panels of each semi-prefabricated reinforcement cage by adopting the concrete, the underground continuous wall is formed, and the operation of the underground continuous wall can be completed.

And step 1), designing and constructing the guide wall according to the standard and specification of the underground continuous wall construction process, wherein the size of the unit groove meets the requirement.

In the step 3), the high-strength concrete has the compressive strength of 100MPa in 3 days, 130MPa in 7 days and 150MPa in 28 days, and the anti-permeability grade of the high-strength concrete is not less than P10.

In the step 3), the high-strength concrete panels are all prefabricated and poured in factories, standardized construction maintenance is adopted, the pouring thickness is 5-8cm, the outer surface is smooth, and the inner side is provided with fixed steel bars.

And 4), fixing and installing the semi-prefabricated reinforcement cage with the deviation less than 1cm, and fixing by filling the prefabricated concrete block.

And 4), putting the semi-prefabricated reinforcement cage into the unit groove and simultaneously clamping the semi-prefabricated reinforcement cage into the clamping groove of the finished unit wall, and when the semi-prefabricated reinforcement cage is lifted and put down, controlling the position of the semi-prefabricated reinforcement cage by using a rope by a professional and slowly putting the semi-prefabricated reinforcement cage into the clamping groove.

The invention provides a semi-prefabricated high-strength concrete reinforcement cage underground continuous wall and a construction method thereof, and the semi-prefabricated high-strength concrete reinforcement cage underground continuous wall has the following advantages:

1. according to the requirements of the steel reinforcement cage and the lifting machine, the high-strength concrete at two sides is clamped, so that the steel reinforcement cage can be prevented from deforming in the lifting process;

2. the semi-prefabricated reinforcement cage is connected by the clamping grooves, so that the problems of water leakage, misalignment and the like at the interface can be effectively prevented;

3. the high-strength concrete adopted by the invention can greatly improve the bearing capacity and the anti-permeability capacity of the underground continuous wall, and can enable the underground continuous wall to be used as a part of the foundation and the structure of a building;

4. the invention adopts the semi-prefabricated reinforcement cage to ensure that the wall of the underground continuous wall is flat, and the wall is continuous and level.

5. The semi-prefabricated underground continuous wall panel has high anti-permeability performance, and can avoid pouring waterproof concrete into the reinforcement cage.

Drawings

FIG. 1 is a schematic view of a semi-prefabricated reinforcement cage;

FIG. 2 is a schematic view of a semi-prefabricated reinforcement cage connected by a slot;

FIG. 3 is a construction axial sectional view of a semi-prefabricated reinforcement cage in a unit groove;

FIG. 4 is a cross-sectional view of a semi-prefabricated reinforcement cage in the construction of unit slots;

in the figure: 1. the steel reinforcement cage 2, the concrete panel 3, the clamping groove 4, the groove wall 5 of the unit groove, the guide wall 6, the reserved gap 7, the crane 8 and the underground continuous wall.

Detailed Description

The invention will be further elucidated with reference to the drawings and examples, without however being limited thereto.

Example (b):

as shown in fig. 1 and 2, a semi-prefabricated formula concrete steel reinforcement cage underground continuous wall, including steel reinforcement cage 1, precast concrete panel 2 is installed to the both sides face of steel reinforcement cage 1, obtains semi-prefabricated formula steel reinforcement cage, and adjacent semi-prefabricated formula steel reinforcement cage adopts draw-in groove 3 to connect, behind the steel reinforcement cage 1 pouring concrete between the concrete panel 2 to each semi-prefabricated formula steel reinforcement cage, forms underground continuous wall 8.

The compressive strength of the concrete panel is more than 150 MPa.

The clamping groove is an I-shaped clamping groove.

As shown in fig. 3 and 4, a construction method of a semi-prefabricated type high-strength concrete reinforcement cage underground continuous wall includes the following steps:

2) designing a reinforcement cage conforming to the size of the unit groove according to the size of the unit groove, installing prefabricated ultrahigh-performance concrete panels on two side surfaces of the reinforcement cage by adopting high-strength concrete, removing a mold after the concrete panels are prefabricated and molded in a factory, maintaining the concrete panels according to a standard, and transporting the concrete panels to a site for installation to obtain a semi-prefabricated reinforcement cage;

3) cleaning the inside of each unit groove, using equipment to detect the inner wall of each groove to be qualified, then using a crane to place the vertical end face of the prefabricated semi-prefabricated reinforcement cage into the unit groove along the clamping groove of the end face of the other constructed underground continuous wall, connecting the adjacent semi-prefabricated reinforcement cages by using the clamping grooves, and performing the next operation after checking whether the semi-prefabricated reinforcement cages are stable or not;

4) after the positions of the semi-prefabricated high-strength concrete reinforcement cages are aligned, backfilling a gap between the wall of the unit groove and the semi-prefabricated reinforcement cage along two sides of the guide wall, and fixing the positions of the semi-prefabricated reinforcement cages;

5) and after concrete is poured into the reinforcement cage between the concrete panels of each semi-prefabricated reinforcement cage, the underground continuous wall is formed, and the operation of the underground continuous wall can be completed.

In the step 4), the gap is convenient for placing the semi-prefabricated reinforcement cage into the unit groove, and the width of the gap is less than 1 cm; backfilling sand and fixing the backfilled sand by using a concrete block to prevent the semi-prefabricated reinforcement cage from deviating and swinging during pouring.

Claims

1. a semi-prefabricated concrete reinforcing bar cage underground diaphragm wall, it is characterized in that, comprise reinforcing bar cage, the two sides of reinforcing bar cage fix prefabricated concrete panels respectively, obtain semi-prefabricated reinforcing bar cage, adjacent semi-prefabricated reinforcing bar cage The slot connection is adopted, and it is hoisted into the unit slot after opening and foundation cleaning. After pouring concrete into the reinforcement cage between the concrete panels of each semi-prefabricated reinforcement cage, an underground continuous wall is formed.

2 . The semi-prefabricated concrete reinforced cage underground diaphragm wall according to claim 1 , wherein the compressive strength of the concrete panel is greater than 150MPa, and the impermeability grade is greater than or equal to P10. 3 .

3 . The semi-prefabricated concrete reinforced cage underground diaphragm wall according to claim 1 , wherein the clamping slot is an I-shaped clamping slot. 4 .

4. a construction method of a semi-prefabricated high-strength concrete reinforcing bar cage underground diaphragm wall, is characterized in that, comprises the steps:

1) Plan the wire, build the guide wall, and use the trenching machine to mine the unit slot;

2) According to the size of the unit slot, design the reinforcement cage and prefabricated panel that meet the size of the unit slot;

3) Using concrete, the panels are prefabricated in the component factory. After the concrete panels are formed, the prefabricated panels are fixed on both sides of the reinforcement cage to obtain a semi-prefabricated reinforcement cage;

4) Clean up the unit slot, and use a crane to put the vertical end face of the prefabricated semi-prefabricated steel cage into the unit slot along the slot of the end face of another underground diaphragm wall that has been constructed, so that the adjacent The semi-prefabricated steel cage is connected by a slot, and the position of the semi-prefabricated steel cage is fixed;

5) After pouring ordinary concrete into the steel cage between the concrete panels of each semi-prefabricated steel cage with concrete, an underground continuous wall is formed, and the operation of the underground continuous wall can be completed.

5. The construction method of a semi-prefabricated high-strength concrete reinforced cage underground diaphragm wall according to claim 4, wherein in step 3), the compressive strength of the concrete can reach 100MPa in 3 days, The high-strength concrete whose compressive strength reaches 130MPa in 7 days and 150MPa in 28 days has an impermeability grade of ≥P10.

6. The construction method of a semi-prefabricated high-strength concrete reinforced cage underground diaphragm wall according to claim 4, characterized in that, in step 3), the high-strength concrete panels are all prefabricated and poured in the factory, using standardized Construction and maintenance, the pouring thickness is 5-8cm, the outside is smooth, and the inside is arranged with fixed steel bars.

7. The construction method of a semi-prefabricated high-strength concrete steel cage underground diaphragm wall according to claim 4, wherein in step 4), the fixed installation deviation of the semi-prefabricated steel cage is less than 1cm, and the prefabricated The concrete blocks are fixed.