阅读说明：本技术 一种混凝土分层施工方法 (Concrete layered construction method ) 是由 李贵兴 刘新红 庞保平 颉小兵 俞天仁 陈晨程 牛彦琦 陈合 刘汉义 陈瑞 王召 于 2020-07-21 设计创作，主要内容包括：本发明实施例提供了一种混凝土分层施工方法,包括基岩面清理和钢筋安装两个环节,其中岩面清理包括：混凝土浇筑前,清除建基面上的杂物、泥土等,岩基面清除松动岩石,并用压力水冲洗干净；如遇有承压水,将采用快硬水泥堵塞并留集中排水口用软管将水引出工作面；经检验合格,才能进入下一个工序；易风化的岩石基础及软基,在立模扎筋前应处理好地基临时保护层。通过本发明的设计,可以确保在岩层上构建筑物的结构基础稳定。(The embodiment of the invention provides a concrete layered construction method, which comprises two links of base rock surface cleaning and reinforcing steel bar installation, wherein the rock surface cleaning comprises the following steps: before concrete pouring, removing impurities, soil and the like on a building base surface, removing loose rocks on the rock base surface, and washing the rock base surface by using pressure water; if pressure-bearing water is met, the quick-hardening cement is adopted to block the water, a centralized water outlet is reserved, and the water is led out of the working face by a hose; after the inspection is qualified, the next procedure can be carried out; the rock foundation and soft foundation which are easy to be weathered are treated well before the steel bars are tied up by erecting the mould. Through the design of the invention, the structural foundation of the building constructed on the rock stratum can be ensured to be stable.)

1. A concrete layered construction method comprises the following steps:

cleaning a bedrock face: before concrete pouring, removing impurities, soil and the like on a building base surface, removing loose rocks on the rock base surface, and washing the rock base surface by using pressure water; if pressure-bearing water is met, the quick-hardening cement is adopted to block the water, a centralized water outlet is reserved, and the water is led out of the working face by a hose; after the inspection is qualified, the next procedure can be carried out; treating a foundation temporary protective layer before erecting a mold and binding bars on the easily weathered rock foundation and a soft foundation;

and (3) steel bar installation: installing a steel bar structure according to a specified position and a specified interval, and laying a protective layer after the steel bars are installed, wherein the thickness of the protective layer is at least 30 mm; arranging cushion blocks on the protective layer, supporting the template by the cushion blocks, and embedding iron wires in the cushion blocks so as to be fastened with the steel bars; the cushion blocks are staggered and distributed.

2. The concrete layering construction method according to claim 1,

the steel bar is HRB400 type, and mainly has specifications of phi 36, phi 32, phi 28, phi 25 and the like; the connection of the steel bars with the diameter of more than phi 28 is mainly realized by adopting a straight thread sleeve, and the steel bars with the diameter of less than phi 25 are subjected to manual arc welding; the anchoring length of the grade III steel bar should not be less than 35d, and when the diameter of the HRB400 grade steel bar is more than 25mm, the minimum anchoring length should be multiplied by a correction factor of 1.1.

3. The concrete layering construction method according to claim 1,

the installation of the steel bars needs to be based on design drawings and measurement lofting points, and the processed steel bars are erected, bound and installed and are firmly reinforced.

4. The concrete layering construction method according to claim 1,

the reinforcing steel bar protective layer is fixed by a mortar cushion block with the same label as the concrete; arranging a specially-assigned person to correct the deformation and displacement of the reinforcing steel bars during concrete pouring; the vertical construction joint dowel bars are characterized in that 2.5 cm wide joints are reserved according to design sizes when the templates are installed, after the dowel bars are installed, the joints between the dowel bars and the dowel bars are sealed by wood boards, and the dowel bars are connected and reinforced on the outer sides of the templates to prevent displacement and deformation during concrete pouring.

Technical Field

The invention relates to the technical field of dam construction, in particular to a concrete layered construction method.

Background

Since buildings near hydroelectric power stations are all built on rocks, special design of concrete is required in the building process, otherwise poor stability of upper buildings will be caused.

Disclosure of Invention

In view of the above technical problems, embodiments of the present invention provide a concrete layered construction method.

A concrete layered construction method comprises the following steps:

cleaning a bedrock face: before concrete pouring, removing impurities, soil and the like on a building base surface, removing loose rocks on the rock base surface, and washing the rock base surface by using pressure water; if pressure-bearing water is met, the quick-hardening cement is adopted to block the water, a centralized water outlet is reserved, and the water is led out of the working face by a hose; after the inspection is qualified, the next procedure can be carried out; treating a foundation temporary protective layer before erecting a mold and binding bars on the easily weathered rock foundation and a soft foundation;

and (3) steel bar installation: installing a steel bar structure according to a specified position and a specified interval, and laying a protective layer after the steel bars are installed, wherein the thickness of the protective layer is at least 30 mm; arranging cushion blocks on the protective layer, supporting the template by the cushion blocks, and embedding iron wires in the cushion blocks so as to be fastened with the steel bars; the cushion blocks are staggered and distributed.

The steel bar is HRB400 type, and mainly has specifications of phi 36, phi 32, phi 28, phi 25 and the like; the connection of the steel bars with the diameter of more than phi 28 is mainly realized by adopting a straight thread sleeve, and the steel bars with the diameter of less than phi 25 are subjected to manual arc welding; the anchoring length of the III-grade steel bar is not less than 35d, and when the diameter of the HRB 400-grade steel bar is more than 25mm, the minimum anchoring length is multiplied by a correction coefficient of 1.1; the installation of the steel bars is carried out according to a design drawing and a measurement lofting point, and the processed steel bars are erected, bound and installed and are firmly reinforced; the reinforcing steel bar protective layer is fixed by a mortar cushion block with the same label as the concrete; arranging a specially-assigned person to correct the deformation and displacement of the reinforcing steel bars during concrete pouring; the vertical construction joint dowel bars are characterized in that 2.5 cm wide joints are reserved according to design sizes when the templates are installed, after the dowel bars are installed, the joints between the dowel bars and the dowel bars are sealed by wood boards, and the dowel bars are connected and reinforced on the outer sides of the templates to prevent displacement and deformation during concrete pouring.

Through the design of the invention, the structural foundation of the building constructed on the rock stratum can be ensured to be stable.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.

Example embodiments will now be described with reference to the accompanying drawings, which may be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art.

Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.

The invention provides a concrete layered construction method, which comprises the following steps:

cleaning a bedrock face: before concrete pouring, removing impurities, soil and the like on a building base surface, removing loose rocks on the rock base surface, and washing the rock base surface by using pressure water; if pressure-bearing water is met, the quick-hardening cement is adopted to block the water, a centralized water outlet is reserved, and the water is led out of the working face by a hose; after the inspection is qualified, the next procedure can be carried out; treating a foundation temporary protective layer before erecting a mold and binding bars on the easily weathered rock foundation and a soft foundation;

and (3) steel bar installation: installing a steel bar structure according to a specified position and a specified interval, and laying a protective layer after the steel bars are installed, wherein the thickness of the protective layer is at least 30 mm; arranging cushion blocks on the protective layer, supporting the template by the cushion blocks, and embedding iron wires in the cushion blocks so as to be fastened with the steel bars; the cushion blocks are staggered and distributed.

The steel bar is HRB400 type, and mainly has specifications of phi 36, phi 32, phi 28, phi 25 and the like; the connection of the steel bars with the diameter of more than phi 28 is mainly realized by adopting a straight thread sleeve, and the steel bars with the diameter of less than phi 25 are subjected to manual arc welding; the anchoring length of the III-grade steel bar is not less than 35d, and when the diameter of the HRB 400-grade steel bar is more than 25mm, the minimum anchoring length is multiplied by a correction coefficient of 1.1; the installation of the steel bars is carried out according to a design drawing and a measurement lofting point, and the processed steel bars are erected, bound and installed and are firmly reinforced; the reinforcing steel bar protective layer is fixed by a mortar cushion block with the same label as the concrete; arranging a specially-assigned person to correct the deformation and displacement of the reinforcing steel bars during concrete pouring; the method comprises the steps of vertically constructing joint dowels, reserving joints with the width of 2.5 cm according to design sizes when templates are installed, sealing the joints between the dowels and the dowels by using wood boards after the dowels are installed, and connecting and reinforcing the dowels at the outer sides of the templates to prevent displacement and deformation during concrete pouring;

and (3) template construction:

the template construction process flow comprises the following steps: paying off → installing support → template hoisting → adjusting → detecting → checking → fixing → checking → concrete pouring → form removal and maintenance → next cycle;

first power generation factory building template

Constructing side walls and side walls of the power generation plant with regular body shapes by adopting P9015 and P3015 standard flat steel templates, wherein the maximum pouring height is 3.0m, and installing and detaching templates by adopting a tower crane or an automobile crane;

Stand column factory building template

Firstly, a bowl buckle support plate and a beam combined steel template are adopted in the auxiliary factory building, and a support body of a unit is a bowl buckle support, an adjustable base and a channel steel and steel template which are used as a support system of a floor slab and a frame beam; the row spacing and the row spacing of the bowl buckle brackets are 80 multiplied by 80cm, and the step height is 100 cm;

secondly, the array pitch at the bottom of the beam is encrypted or support columns are adopted, the upper end of the support columns is supported on a beam bottom template by a single support combined with channel steel, and the lower end of the support columns is adjusted in height by an adjustable base; paving the paving plates along the direction of the main purlin according to the designed paving direction of the main purlin and the secondary purlin; in order to prevent slurry leakage and local deformation, when a top formwork is erected, a batten (0.15 m wide) is erected along the periphery of a wall and is properly fixed, and a floor slab steel formwork is lapped on the batten; the erection of the beam frame of the outer frame beam can utilize a bowl buckle frame, a ground anchor and a steel pipe fastener as a cantilever frame;

construction process flow: erecting a first upright rod on a base point, adjusting an adjustable base to a calculated height, installing a unit of 80 multiplied by 80cm along a datum line → adjusting the calculated height of the unit to meet the height requirement of the whole bay frame → taking the unit as a reference, installing the whole bay frame according to the size of a marked cross rod → installing an adjustable support, adjusting to the height of laying a main keel → laying a main keel and a secondary keel according to the design direction, jacking a batten → laying a steel formwork, leveling the formwork → adhering an adhesive tape to a seam

Fourthly, constructing the concrete of the stand columns of each layer of the auxiliary workshop by adopting four steel templates to form a column mould, and reinforcing the column mould by adopting a column hoop or a surrounding purlin, wherein the layering height is 3.0-4.5 m for one layer;

three bracket concrete form

The bracket parts of the gate piers of the inlet and the tail water channels adopt special-shaped internal pull bracket templates, and the concrete is internally provided with steel bar columns which are connected with the templates through pull bars;

fourth design template

The pier nose shaping template and the water inlet and outlet shaping template are customized by a professional template manufacturer according to the requirement of the body type of the design drawing, and the finished shaping template is delivered out of a factory for use after being checked and accepted by technical quality.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to this embodiment will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the specification and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order.