CN108468438B - Comprehensive construction method for treating rammed earth wall under space condition limitation - Google Patents

Abstract

The invention provides a comprehensive construction method for treating a rammed earth wall under the limitation of space conditions, which is characterized by comprising the following steps of: a: manufacturing rammed earth wall blocks; b: preparing special mortar for building rammed earth wall blocks; c: installing rammed earth wall blocks; d: the effective connection treatment of the topmost layer of rammed earth wall blocks and the structural beam slab; e: the gaps between the rammed earth wall blocks and the lower in-situ rammed earth wall adopt the original ramming and filling technology of the gaps between the in-situ rammed earth walls. The invention adopts multilayer prefabricated rammed earth wall blocks and combines the topmost block and the grouting steel bar connecting structure of the structural beam slab, so the integral appearance effect is good, the vertical texture appearance effect is neat, the ramming degree is stable, and the integral quality is high.

Description

Comprehensive construction method for treating rammed earth wall under space condition limitation

Technical Field

The invention relates to a construction technology, in particular to a novel rammed earth building construction method for decorative effect.

Background

The novel rammed earth wall belongs to one of the technologies of 'ancient ways newly do' in the building industry, and modern use mainly solves some special buildings, such as the antique decorative effect of museum, historical exhibition hall, etc., utilizes formwork technology, adopts the operation technology mode of tamping and filling in layers to obtain the antique edition on appearance and builds the texture effect (filling soil in the middle of the splint and tamping, the successive layer upwards).

The requirement of the tamping in the tamping process on the operation space is clear, and at least a high space for enabling an operator to normally use a tamping tool to perform tamping is required. When the novel rammed earth wall is designed for a building with a cast-in-place frame structure, a part of the top of the wall body is often provided with cast-in-place structural beam slabs, and the problem that the operation cannot be performed due to the limited top space is solved.

As shown in fig. 1, the top of the in-situ rammed earth wall 1 manufactured by the prior art is a cast-in-place structural beam slab 2, and the gap 12 between the in-situ rammed earth wall 1 and the structural beam slab 2 is small.

At present, the method of layered small filling and small tamping is adopted at the position where tamping cannot be implemented at the top of the novel rammed earth wall, and a side filling extrusion method is usually adopted at the position where the top is even small filling and small tamping cannot be operated, but the overall appearance effect of a final finished product is poor, the texture appearance effect presented from top to bottom is obviously different, the tamping degree cannot be guaranteed, the overall quality has hidden danger, and the novel rammed earth wall cannot be used in places with higher requirements.

Disclosure of Invention

The invention provides a comprehensive construction method for a rammed earth wall under the limitation of space conditions, which aims to solve the defects of the prior art and ensure that the overall appearance of the novel rammed earth wall with a decorative effect is good and stable after the top of the novel rammed earth wall is constructed.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a comprehensive construction method for treating a rammed earth wall under the limitation of space conditions is characterized by comprising the following steps: the method comprises the following steps:

a: manufacturing a rammed earth wall block material: erecting an auxiliary mould of the rammed earth wall by using a mould erecting process consistent with the process for manufacturing the in-situ rammed earth wall, and manufacturing a rammed earth wall block material with the thickness equal to the thickness of the in-situ rammed earth wall by using earth materials consistent with the in-situ rammed earth wall, a ramming method consistent with the process and ramming times;

b: preparing special mortar for building rammed earth wall blocks: the weight ratio of the prepared cement to the sand is 1: 3, adding 10 percent of acrylate copolymer emulsion by weight of cement into the cement mortar, wherein the cement is 32.5-grade ordinary portland cement, and the sand is ordinary medium sand with the mud content not more than 1 percent;

c: installing rammed earth wall blocks: building one or more blocks of rammed earth wall blocks to the top of the in-situ rammed earth wall (the upper range of the wall which cannot be operated due to the limitation of space conditions); the thickness of a horizontal mortar joint of the masonry mortar is controlled according to 3mm, no mortar joint is vertically arranged, and rammed earth wall blocks are mutually propped and placed;

d: the effective connection treatment of one layer of rammed earth wall block material on the top and the structural beam plate: reserving a grouting groove at the top of the most top layer of rammed earth wall blocks during ramming and forming, wherein the width of the grouting groove is gradually reduced from top to bottom; reserving grouting holes when the structural beam plate is poured; after the topmost layer of rammed earth wall blocks is built in place, the grouting holes are located above the grouting grooves, grouting is conducted in the grouting holes and the grouting grooves, and reinforcing steel bars are inserted;

e: the gap between the rammed earth wall blocks and the lower in-situ rammed earth wall adopt the gap treatment technology between the in-situ rammed earth walls of the original ramming and filling process: common wood trowel is used as a treatment tool, a fine mist spray can is used for spraying water to the gap parts in a proper amount for wetting, and the wood trowel is used for rubbing along the gap properly, so that the gap traces among all the parts are eliminated, and the surface achieves a relatively consistent effect.

The grout groove is the groove that section width reduces gradually and set up along rammed earth wall bulk material through-length from the top down.

The invention has the advantages that:

the invention adopts multilayer prefabricated rammed earth wall blocks and combines the topmost block and the grouting steel bar connecting structure of the structural beam slab, so the integral appearance effect is good, the vertical texture appearance effect is neat, the ramming degree is stable, and the integral quality is high.

Drawings

FIG. 1 is a prior art schematic;

FIG. 2 is a schematic view of the present invention.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other embodiments can be obtained according to the drawings without inventive labor.

As shown in fig. 2:

technical measure 1: the rammed earth wall blocks 3 are manufactured on site and are arranged at the top of the in-situ rammed earth wall 1 where ramming and filling operations cannot be carried out, and the rammed earth wall blocks 3 are built to the top just like building a wall. I.e. the upper extent of the wall which is not operable due to space conditions. The rammed earth wall block 3 is manufactured by supporting an auxiliary mould of the rammed earth wall nearby by using the same mould supporting process when the in-situ rammed earth wall 1 is rammed and filled, adopting earth materials which are completely consistent with the in-situ rammed earth wall 1, adopting a ramming method with consistent process and ramming times, wherein the thickness of the manufactured rammed earth wall block 3 is equal to the thickness of the in-situ rammed earth wall 1, the length of the manufactured rammed earth wall block can be obtained according to 400-600 mm, the rammed earth wall block can be sawed according to actual needs, and the height of the rammed earth wall block can be controlled according to actual conditions on site according to 200-400 mm.

Technical measure 2: the rammed earth wall blocks 3 are prepared by special mortar for masonry. The special mortar for building the rammed earth wall block 3 is 1: 3, cement mortar (the weight-to-weight ratio of cement to sand is 10 percent of the weight of the cement, and acrylate copolymer emulsion is added), wherein the cement is 32.5 grade ordinary portland cement, and the sand is ordinary medium sand (the mud content is not more than 1 percent). The thickness of the horizontal mortar joint of the masonry mortar is controlled according to 3mm, the mortar joint is not vertically arranged, and rammed earth wall blocks are mutually propped and placed.

Technical measure 3: and (3) effectively connecting the topmost layer of rammed earth wall blocks 3 with the structural beam plates 2. The method comprises the following steps: a measure of an inverted trapezoid grouting groove 4 is reserved in the rammed earth wall block 3 at the topmost layer during ramming and filling molding; and (5) reserving a grouting hole 5 when the structural beam plate 2 is poured. The grouting groove 4 is arranged along the length direction of the wall body, the section of the grouting groove 4 is in an inverted trapezoid shape, the upper part of the grouting groove is wide, the lower part of the grouting groove is narrow, and the size range is within a certain range; namely, the grouting groove 4 is a groove with gradually reduced section width from top to bottom and arranged through the length; after the topmost layer of rammed earth wall blocks 3 is built in place, the grouting holes 5 are positioned above the grouting grooves 4, and reinforcing steel bars 6 are grouted and inserted into the grouting holes 5 and the grouting grooves 4.

Technical measure 4: the treatment technology of the gaps between the rammed earth wall blocks 3 and the in-situ rammed earth wall 1 with the lower part directly adopting the ramming and filling process comprises the following steps:

common wood trowel is used as a processing tool, a 2L fine mist spray can is used for spraying water to the gap part in a proper amount for wetting, and the wood trowel is used for rubbing along the gap in a proper amount, so that the gap traces among all parts are eliminated, and the surface achieves a relatively consistent effect.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. 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 these embodiments 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.

Claims (1)

1. A comprehensive construction method for treating a rammed earth wall under the limitation of space conditions is characterized by comprising the following steps: the method comprises the following steps:

a: manufacturing a rammed earth wall block material: erecting an auxiliary mould of the rammed earth wall by using a mould erecting process consistent with the process for manufacturing the in-situ rammed earth wall, and manufacturing a rammed earth wall block material with the thickness equal to the thickness of the in-situ rammed earth wall by using earth materials consistent with the in-situ rammed earth wall, a ramming method consistent with the process and ramming times;

b: preparing special mortar for building rammed earth wall blocks: the weight ratio of the prepared cement to the sand is 1: 3, adding 10 percent of acrylate copolymer emulsion by weight of cement into the cement mortar, wherein the cement is 32.5-grade ordinary portland cement, and the sand is ordinary medium sand with the mud content not more than 1 percent;

c: installing rammed earth wall blocks: building one or more blocks of rammed earth wall blocks to the top of the in-situ rammed earth wall; the thickness of a horizontal mortar joint of the masonry mortar is controlled according to 3mm, no mortar joint is vertically arranged, and rammed earth wall blocks are mutually propped and placed;

d: the effective connection treatment of one layer of rammed earth wall block material on the top and the structural beam plate: reserving a grouting groove at the top of the most top layer of rammed earth wall blocks during ramming and forming, wherein the diameter of the grouting groove is gradually reduced from top to bottom; reserving grouting holes when the structural beam plate is poured; after the topmost layer of rammed earth wall blocks is built in place, the grouting holes are located above the grouting grooves, grouting is conducted in the grouting holes and the grouting grooves, and reinforcing steel bars are inserted;

e: the gap between the rammed earth wall blocks and the lower in-situ rammed earth wall adopt the gap treatment technology between the in-situ rammed earth walls of the original ramming and filling process: common wood trowel is used as a treatment tool, a fine mist spray can is used for spraying water to the gap parts in a proper amount for wetting, and the wood trowel is used for rubbing along the gap properly, so that the gap traces among all the parts are eliminated, and the surface achieves a relatively consistent effect.

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