CN115717407A - Retaining wall single-face formwork structure of ultra-high steep slope and construction method thereof - Google Patents

Abstract

The invention relates to a single-sided formwork structure for a retaining wall on a super-high and steep slope and a construction method thereof, comprising: a formwork set corresponding to the formwork position of the retaining wall; several rows of anchor cables arranged at intervals along the height direction of the formwork , the anchor cables in each row are distributed at intervals along the length direction of the formwork, one end of the anchor cables is anchored in the rock of the slope, and the other end extends out of the formwork and is fixed on the formwork. The anchor cable is pulled to achieve fixation to the formwork. In the present application, there is no need for supporting steel pipes along the entire height of the formwork, which reduces the construction cost and makes the construction more convenient.

Description

Retaining wall single-sided formwork structure and its construction method for super high and steep slope

technical field

The invention relates to the technical field of buildings, in particular to a single-sided formwork structure for a retaining wall on a super-high and steep slope and a construction method thereof.

Background technique

In the construction of the slope-attached retaining wall, it is necessary to use the method of one-sided support formwork to reinforce the formwork, and then pour concrete to form the retaining wall. In the prior art, supporting steel pipes are usually arranged obliquely outside the formwork, and the supporting steel pipes are propped between the formwork and the ground to support and fix the formwork. However, for the construction of retaining walls on super high and steep slopes, Due to the high construction height of the retaining wall, if super-long supporting steel pipes are used for construction, not only the manufacturing cost and transportation construction cost are high, but also the construction operation is relatively difficult.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a single-sided formwork structure and construction method for a retaining wall on a super-high and steep slope, so as to solve the problem of using super-long support for the existing retaining wall on a super-high and steep slope The formwork support method of the steel pipe will cause the problems of manufacturing cost, high transportation and construction cost, and difficult construction operation.

In order to achieve the above purpose, the present invention provides a single-sided formwork structure for a retaining wall on a super-high and steep slope, including:

The template corresponding to the formwork position setting of the retaining wall;

A plurality of rows of anchor cables are arranged at intervals along the height direction of the formwork, each row of anchor cables is distributed along the length direction of the formwork at intervals, one end of the anchor cables is anchored in the slope rock, and the other end extends out of the The template is outside and fixed on the template, and the anchor cable is stretched by prestressing to realize the fixing of the template.

In the present invention, several rows of anchor cables are arranged at intervals along the height direction of the formwork, one end of the anchor cables is anchored in the rock of the slope, the other end extends out of the formwork and is fixed on the formwork, and through prestressing Stretching the anchor cable to realize the tension fixation of the formwork. In the present application, there is no need for supporting steel pipes along the entire height of the formwork, which reduces the construction cost and makes the construction more convenient.

The further improvement of the single-sided formwork structure of the retaining wall of the ultra-high and steep slope of the present invention is that it also includes at least one pair of reinforcing rods with one end fixed on the anchor cable and a sleeve sleeve sleeved on the anchor cable;

One end of the sleeve is fixed against the slope surface and the other end is passed through and fixed on the template;

The other end of the reinforcement rod extends out of the sleeve and is fixed on the formwork, and each pair of reinforcement rods is respectively located above and below the corresponding anchor cable.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention lies in that the reinforcement rods on each row of anchor cables are distributed in two rows and the positions of each row of reinforcement rods on the formwork are along the The lengthwise interval distribution of the template;

The retaining wall single-sided formwork structure also includes a stop rod fixedly connected to each row of the reinforcement rods and abutting against the outside of the formwork, and the setting direction of the stop rod is consistent with the length direction of the formwork.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention lies in the installation of the reinforcement bar on the sleeve from the end of the sleeve close to the slope to the installation of the reinforcement rod on the sleeve. The position is provided with a through groove that runs through the sleeve, and the setting direction of the through groove is consistent with the setting direction of the corresponding reinforcing rod, and the reinforcing rod is placed in the through groove;

The retaining wall single-sided formwork structure also includes a sealing member fixed on the sleeve and sealingly covering the through groove.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention lies in that it also includes a socket piece that is sleeved and fixed on the anchor cable;

One end of the reinforcing rod is installed and fixed on the sleeve.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention is that it also includes at least one row of screw rods that are fixed on the template and are located between two adjacent rows of anchor cables, installed on the The upper side and the lower side of each row of the screw rods and the steel pipes located outside the formwork, and the buckles installed on the screw rods and located on the side of the steel pipes away from the formwork;

The buckle is clamped on the steel pipes on the upper and lower sides of the screw, so that the steel pipe is pressed against the template, and the screw is clamped and fixed between the corresponding pair of steel pipes ;

By dividing the concrete pouring area of two adjacent rows of anchor cables into three pouring layers of anchor cable layers in the lower row, screw layers between the two rows of anchor cables, and anchor cable layers in the upper row, The screw rod is partially embedded in the solidified concrete, so that the formwork is clamped between the solidified concrete and the steel pipe.

The further improvement of the single-sided formwork structure of the retaining wall of the ultra-high and steep slope of the present invention is that it also includes several rows of diagonal braces that are obliquely supported and connected between the outer side of the formwork and the ground and are located at the bottom of the formwork , each row of diagonal braces is distributed at intervals along the length direction of the template.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention is that it also includes a first mounting seat installed and fixed on the outer surface of the template corresponding to the setting position of the diagonal brace and corresponding to the The setting position of the diagonal brace is installed and fixed on the second mounting seat above the ground;

The top end of the diagonal brace is hingedly connected to the first mounting base through a first hinge shaft, and the bottom end is hingedly connected to the second hinge base through a second hinge shaft.

The further improvement of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention is that it also includes hanging and fixing the steel mesh on the slope surface and spraying and forming on the slope surface and embedding. The fine stone concrete layer of the steel mesh.

The present invention also provides a construction method for the single-sided formwork structure of the retaining wall of the super-high and steep slope as described above, comprising the following steps:

Construct the retaining wall section by section from bottom to top, construct at least two rows of the anchor cables in the first construction section, anchor one end of the anchor cables in the first construction section in the slope rock, and bind the retaining wall steel bars in the first construction section , support the formwork of the first construction section, pass the other end of the anchor cable of the first construction section through the retaining wall reinforcement of the first construction section and extend out of the formwork and fix it on the formwork of the first construction section, so that each The anchor cables are arranged at intervals along the length direction of the formwork, and the anchor cables are stretched by prestress to fix the formwork of the first construction section and pour the retaining wall concrete of the first construction section;

Construct the anchor cable of the next construction section, the reinforcement of the retaining wall of the next construction section, the formwork of the next construction section and the concrete of the retaining wall of the next construction section, and repeat this step until the construction of the entire retaining wall is completed.

Description of drawings

Fig. 1 is a state diagram of the single-sided formwork structure of the retaining wall of the super-high steep slope of the present invention during the construction of the first construction section.

Fig. 2 is a state diagram of the single-sided formwork support structure of the retaining wall of the ultra-high and steep slope of the present invention when the anchor cables located in the upper row are being constructed.

Explanation of symbols: fine stone concrete layer 10, template 20, anchor cable 30, socket 31, casing 40, reinforcement rod 50, gear rod 60, screw rod 70, buckle 71, steel pipe 80, and diagonal brace 90.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The invention provides a single-sided formwork structure for a retaining wall with a super-high and steep slope and its construction method. On the one hand, anchor cables 30 are used to support and fix the anchor plate, and on the other hand, the concrete is poured layer by layer, so that the After the screw 70 is firmly embedded in the concrete, the steel pipe 80 and the buckle 71 are installed on the screw 70 to further strengthen the formwork 20. When the concrete above is poured, the mechanical performance of the formwork 20 can be effectively enhanced and the ultra-high cracking can be alleviated. The formwork 20 in the stone layer area reinforces the pressure.

The retaining wall single-sided formwork structure and construction method of the super-high and steep slope of the present invention will be described below in conjunction with the accompanying drawings.

Referring to Fig. 1 and Fig. 2, in this embodiment, a retaining wall single-sided formwork structure of a super-high and steep slope includes: a formwork 20 set corresponding to the formwork position of the retaining wall; along the height direction of the formwork 20 A plurality of rows of anchor cables 30 arranged at intervals, each row of anchor cables 30 are distributed at intervals along the length direction of the formwork 20, one end of the anchor cables 30 is anchored in the slope rock, and the other end extends out of the formwork 20 And it is fixed on the template 20, and the anchor cable 30 is stretched by prestressing, so as to realize the fixing of the template 20.

In this embodiment, the single-sided formwork structure of the retaining wall uses one end of the anchor cable 30 to be anchored in the slope rock, and the other end supports and hangs the formwork 20, and the anchor cable 30 is stretched by prestressing to strengthen the anchor cable. 30 force performance. The method of constructing the anchor cable 30 reduces the construction cost, and the construction is more convenient.

Referring to Fig. 1 and Fig. 2, in a specific embodiment, the single-sided formwork structure of the retaining wall further includes at least one pair of reinforcing rods 50 installed and fixed on the anchor cable 30 at one end and sleeved on the anchor cable 30. The sleeve 40 on the top; one end of the sleeve 40 is fixed against the slope surface and the other end is passed through and fixed on the template 20; the other end of the reinforcement rod 50 extends out of the sleeve 40 and pass through and fixed on the template 20 , each pair of reinforcing rods 50 is located above and below the corresponding anchor cables 30 .

One end of the reinforcement rod 50 is fixed on the anchor cable 30 and the other end is fixed on the formwork 20 , so as to further support and reinforce the formwork 20 through the reinforcement member.

By setting the casing 40 to enclose the anchor cable 30 , it is avoided that the anchor cable 30 is completely embedded in the concrete when pouring concrete, which will affect the mechanical performance of the anchor cable 30 .

Referring to FIGS. 1 and 2 , further, the reinforcement rods 50 on each row of anchor cables 30 are distributed in two rows and the position of each row of reinforcement rods 50 on the template 20 is along the length direction of the template 20 distributed at intervals; the single-sided formwork structure of the retaining wall also includes a stop bar 60 fixedly connected to each row of the reinforcing bars 50 and abutting against the outside of the formwork 20, and the setting direction of the stop bar 60 is the same as that of the The length direction of the template 20 is consistent.

Referring to Fig. 1 and Fig. 2, further, the sleeve 40 is provided with through-holes from the end of the sleeve 40 close to the slope to the installation position of the reinforcement rod 50 on the sleeve 40. The groove of the casing 40, the setting direction of the groove is consistent with the setting direction of the corresponding reinforcing rod 50, and the reinforcing rod 50 is placed in the groove; the single-sided formwork structure of the retaining wall It also includes a seal fixed on the sleeve 40 and sealingly covering the through groove.

Since the reinforcing rod 50 needs to be installed on the anchor cable 30 first, by opening a groove on the sleeve 40, when the sleeve 40 is placed on the anchor cable 30, the reinforcing rod 50 can be smoothly inserted into the corresponding groove, thereby It is convenient to install the casing 40. After the casing 40 is installed, seal the groove with a sealing member, so as to prevent concrete from penetrating into the casing 40 and affecting the anchor cable 30.

Preferably, the sealing member is a sealing tape, and the sealing tape is wound on the sleeve 40 to seal and cover the groove.

Referring to Fig. 1 and Fig. 2, in a specific embodiment, it also includes a socket 31 sleeved and fixed on the anchor cable 30; one end of the reinforcing rod 50 is mounted and fixed on the socket 31 .

Further, the sleeve 31 is a U-shaped clamp.

Referring to Fig. 1 and Fig. 2, in a specific embodiment, the single-sided formwork structure of the retaining wall further includes at least one row fixed on the formwork 20 and located between two adjacent rows of anchor cables 30 The screw 70, the steel pipe 80 installed on the upper side and the lower side of each row of the screw 70 and located outside the formwork 20, is sleeved on the screw 70 and located on a side of the steel pipe 80 away from the formwork 20. The buckle 71 on the side; the buckle 71 is set on the steel pipe 80 on the upper side and the lower side of the screw 70, so that the steel pipe 80 is pressed against the template 20, and the screw 70 Clamping and fixing between a pair of corresponding steel pipes 80; by dividing the concrete pouring area of the two adjacent rows of anchor cables 30 into the anchor cable layer in the lower row and the anchor cable layer between the two rows of anchor cables 30 The three-layer pouring layer of the screw layer and the anchor cable layer in the upper row is partially embedded in the solidified concrete through the screw rod 70, so that the formwork 20 is clamped between the solidified concrete and the steel pipe Between 80. One end of the screw 70 is embedded in the concrete and the other end is fixed by the steel pipe 80 and the buckle 71, so as to realize the reinforced support for the formwork 20 and relieve the reinforcement pressure of the formwork 20 in the ultra-high gravel layer area. .

Preferably, the buckle 71 is a mountain-shaped buckle.

Referring to FIG. 1 , in a specific embodiment, the single-sided formwork structure of the retaining wall also includes several rows of diagonal braces that are diagonally supported between the outer side of the formwork 20 and the ground and located at the bottom of the formwork 20 90 , and each row of diagonal braces 90 is distributed at intervals along the length direction of the formwork 20 .

Preferably, the diagonal braces 90 are only used at a lower height from the ground, and the upper area is not provided, so as to reduce the construction cost and strengthen the reinforcement of the bottom of the formwork 20 .

Further, the single-sided formwork support structure of the retaining wall also includes a first installation seat installed and fixed on the outer surface of the formwork 20 corresponding to the installation position of the diagonal brace 90 and installed corresponding to the installation position of the diagonal brace 90. The second installation base fixed on the ground; the top end of the diagonal brace 90 is hingedly connected to the first installation base through a first hinge shaft and the bottom end is hinged to the second hinge joint through a second hinge shaft. seat.

Referring to Fig. 1, further, the single-sided formwork structure of the retaining wall also includes a reinforcement mesh hung and fixed on the slope surface and a thin mesh formed by spraying on the slope surface and embedding the reinforcement mesh. The stone concrete layer 10 is formed to reinforce the slope surface by forming the fine stone concrete layer 10 .

Preferably, a plurality of soil discharge nails are drilled at intervals along the height direction of the side slope surface on the side slope surface, and the steel mesh is fixed on the soil nails.

In a specific embodiment, the other end of the anchor cable 30 is sheathed with an anchor and the anchor abuts against the outer surface of the template 20 .

Preferably, the casing 40 is a PVC pipe.

The construction process of the retaining wall single-sided formwork structure of the super-high and steep slope of the present invention will be described below.

Use soil nails to hang the reinforcement mesh on the slope surface, and spray fine stone concrete on the slope surface to embed the reinforcement mesh to strengthen the slope surface.

In this embodiment, the retaining wall is constructed section by section from bottom to top by means of segmented formwork, and concrete is poured layer by layer in each construction section by layered pouring, and the formwork of each construction section is at least 20 There are two rows of said anchor cables 30 fixed.

When pouring two adjacent rows of anchor cable 30 areas, construct the anchor cable 30 located in the lower row, and pour the concrete of the anchor cable layer located in the lower row until the concrete of the anchor cable layer located in the lower row reaches the preset value. After the strength, at least one row of screw rods 70 is fixed at the formwork 20 above the lower row of anchor cable layers, the concrete of the screw rod layer is poured and the screw rods 70 are embedded, and after the concrete of the screw rod layer reaches the preset strength, the Install steel pipes 80 on the upper and lower sides of each row of screw rods 70 at the outside of the template 20, install and fix buckle parts 71 on the screw rods 70, and fasten the buckle parts 71 on the upper and lower sides of the screw rods 70. On the steel pipe 80, so that the steel pipe 80 is pressed against the template 20, the anchor cables 30 in the upper row are constructed, and the concrete for the anchor cable layer in the upper row is poured.

The present invention also provides a construction method for the single-sided formwork structure of the retaining wall of the super-high and steep slope as described above, comprising the following steps:

Construction of the retaining wall section by section from bottom to top, construction of at least two rows of anchor cables 30 in the first construction section, anchoring one end of the anchor cables 30 in the first construction section in the rock of the slope, binding the retaining walls of the first construction section The wall reinforcement is used to support the formwork 20 of the first construction section, and the other end of the anchor cable 30 of the first construction section passes through the retaining wall reinforcement of the first construction section and extends out of the formwork 20 and is fixed to the first construction section. On the formwork 20, the anchor cables 30 of each row are distributed at intervals along the length direction of the formwork 20, and the anchor cables 30 are stretched by prestress to fix the formwork 20 of the first construction section, and pour the first construction section. retaining wall concrete;

Construct the anchor cable 30 of the next construction section, the reinforcing bar of the retaining wall of the next construction section, the formwork 20 of the next construction section and the concrete of the retaining wall of the next construction section, and repeat this step until the construction of the entire retaining wall is completed.

In a specific embodiment, when the formwork 20 is supported, one end of at least one pair of reinforcement rods 50 is installed and fixed on the anchor cable 30, and the sleeve 40 is sleeved on the anchor cable 30, so that the The other end of the reinforcement rod 50 extends out of the sleeve 40 and is fixed on the template 20, and each pair of reinforcement rods 50 is respectively located above and below the corresponding anchor cable 30. One end of the sleeve 40 is fixed against the side slope and the other end is passed through and fixed on the template 20 .

Further, the reinforcement rods 50 on each row of anchor cables 30 are distributed in two rows, and the positions of each row of reinforcement rods 50 on the template 20 are distributed along the length direction of the template 20 at intervals;

After the reinforcement rod 50 is installed, the gear rod 60 is fixedly connected to each row of the reinforcement rod 50 and leans against the outside of the template 20, so that the setting direction of the gear rod 60 is aligned with the length direction of the template 20 unanimous.

Further, the sleeve 40 is provided with a through groove through the sleeve 40 from the end of the sleeve 40 close to the side slope to the installation position of the reinforcement rod 50 on the sleeve 40 , the setting direction of the through groove is consistent with the setting direction corresponding to the reinforcing rod 50;

When the casing 40 is sheathed on the anchor cable 30 , the reinforcing rod 50 is inserted into the corresponding through groove, and is fixed on the casing 40 by a sealing member so as to seal and cover the through groove.

In a specific embodiment, when installing the reinforcing rod 50 , the sleeve 31 is sleeved and fixed on the anchor cable 30 , and one end of the reinforcing rod 50 is installed and fixed on the sleeve 31 .

In a specific embodiment, the retaining wall is constructed section by section from bottom to top by means of segmented formwork, and concrete is poured layer by layer from bottom to top in each construction section by layered pouring, and each construction section The template 20 has at least two rows of the anchor cables 30 fixed;

When pouring two adjacent rows of anchor cable 30 areas, construct the anchor cable 30 located in the lower row, and pour the concrete of the anchor cable layer located in the lower row until the concrete of the anchor cable layer located in the lower row reaches the preset value. After the strength, at least one row of screw rods 70 is fixed at the formwork 20 above the lower row of anchor cable layers, the concrete of the screw rod layer is poured and the screw rods 70 are embedded, and after the concrete of the screw rod layer reaches the preset strength, the Install steel pipes 80 on the upper and lower sides of each row of screw rods 70 at the outside of the template 20, install and fix buckle parts 71 on the screw rods 70, and fasten the buckle parts 71 on the upper and lower sides of the screw rods 70. On the steel pipe 80, so that the steel pipe 80 is pressed against the template 20, the anchor cables 30 in the upper row are constructed, and the concrete for the anchor cable layer in the upper row is poured.

In a specific embodiment, when constructing the formwork 20, several rows of diagonal braces 90 are obliquely supported and connected between the outer side of the formwork 20 and the ground corresponding to the bottom of the formwork 20, so that each row of The diagonal braces 90 are distributed at intervals along the length direction of the template 20 .

Further, the installation position of the first mounting seat corresponding to the diagonal brace 90 is installed and fixed on the outer surface of the template 20, and the second mounting seat is installed and fixed on the ground corresponding to the installation position of the diagonal brace 90. superior;

The top end of the diagonal brace 90 is hingedly connected to the first mounting base through a first hinge shaft, and the bottom end is hingedly connected to the second hinge base through a second hinge shaft.

Furthermore, before the construction of the anchor cable 30, the steel mesh is hung and fixed on the entire slope surface, and the fine stone concrete is sprayed on the slope surface to form a fine stone concrete layer 10 and the steel bars are embedded. net.

It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not intended to limit the present invention Therefore, it has no technical substantive meaning, and any modification of structure, change of proportional relationship or adjustment of size shall still fall into the within the scope covered by the technical content disclosed in the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit this specification. The practicable scope of the invention and the change or adjustment of its relative relationship shall also be regarded as the practicable scope of the present invention without any substantial change in the technical content.

Claims (10)

1. The utility model provides a retaining wall single face formwork structure of steep side slope of superelevation which characterized in that includes:

the template is arranged corresponding to the formwork supporting position of the retaining wall;

the anchor cable fixing device comprises a plurality of rows of anchor cables arranged at intervals in the height direction of a template, wherein each row of anchor cables are distributed at intervals in the length direction of the template, one ends of the anchor cables are anchored in side slope rocks, the other ends of the anchor cables extend out of the template and are fixed on the template, and the anchor cables are tensioned through prestress so as to fix the template.

2. The retaining wall single-sided formwork structure of ultra-high steep side slope according to claim 1, further comprising at least one pair of reinforcing rods with one ends fixed on the anchor cables and sleeves sleeved on the anchor cables;

one end of the sleeve is abutted against and fixed on the side slope surface, and the other end of the sleeve is fixedly arranged on the template in a penetrating way;

the other ends of the reinforcing rods extend out of the sleeve and penetrate and are fixed on the template, and each pair of reinforcing rods is located above and below the corresponding anchor cable respectively.

3. The retaining wall single-side formwork structure with the ultra-high steep side slope as claimed in claim 2, wherein the reinforcing rods on each row of the anchor cables are distributed in two rows, and the positions of the reinforcing rods on the formwork in each row are distributed at intervals along the length direction of the formwork;

the retaining wall single-face formwork structure further comprises a blocking rod fixedly connected to each row of the reinforcing rods and abutted against the outer side of the formwork, and the setting direction of the blocking rods is consistent with the length direction of the formwork.

4. The retaining wall single-side formwork structure with the ultra-high steep side slope as claimed in claim 2, wherein a through groove penetrating through the sleeve is formed in the sleeve from one end of the sleeve close to the side slope to the installation position of the reinforcing rod on the sleeve, the arrangement direction of the through groove is consistent with the arrangement direction corresponding to the reinforcing rod, and the reinforcing rod is arranged in the through groove in a penetrating manner;

the retaining wall single-face formwork structure further comprises a sealing element which is fixed on the sleeve and hermetically covers the through groove.

5. The retaining wall single-face formwork structure of the ultra-high steep side slope as claimed in claim 2, further comprising a sleeve member sleeved and fixed on the anchor cable;

one end of the reinforcing rod is fixedly arranged on the sleeve-joint piece.

6. The retaining wall single-side formwork structure with the ultra-high steep side slope as claimed in claim 1, further comprising at least one row of screw rods which are fixedly arranged on the formwork in a penetrating manner and are located between two adjacent rows of the anchor cables, steel pipes which are arranged on the upper side and the lower side of each row of the screw rods and are located on the outer side of the formwork, and a buckling piece which is sleeved on the screw rods and is located on one side, far away from the formwork, of the steel pipe;

the clamping pieces are clamped on the steel pipes positioned on the upper side and the lower side of the screw rod so that the steel pipes are tightly propped against the template, and the screw rod is clamped and fixed between the corresponding pair of steel pipes;

concrete pouring areas of two adjacent rows of anchor cables are divided into three pouring layers, namely an anchor cable layer positioned in one row below, a screw rod layer positioned between the two rows of anchor cables and an anchor cable layer positioned in one row above, and the three pouring layers are partially embedded and fixed in solidified concrete through the screw rods, so that the template is clamped between the solidified concrete and the steel pipe.

7. The retaining wall single-side formwork structure with the ultra-high steep side slope as claimed in claim 1, further comprising a plurality of rows of diagonal braces obliquely supported and connected between the outer side surface of the formwork and the ground and positioned at the bottom of the formwork, wherein each row of diagonal braces are distributed at intervals along the length direction of the formwork.

8. The retaining wall single-face formwork structure of the ultra-high steep slope as claimed in claim 7, further comprising a first mounting seat fixed on the outer side face of the formwork corresponding to the arrangement position of the diagonal support member and a second mounting seat fixed on the ground corresponding to the arrangement position of the diagonal support member;

the top end of the diagonal bracing piece is hinged to the first mounting seat through a first hinge shaft, and the bottom end of the diagonal bracing piece is hinged to the second hinge seat through a second hinge shaft.

9. The retaining wall single-face formwork structure of the ultra-high steep side slope as claimed in claim 1, further comprising a reinforcing mesh fixedly hung on the side slope surface and a fine stone concrete layer formed on the side slope surface by spraying and fixedly buried in the reinforcing mesh.

10. A construction method of the retaining wall single-face formwork structure with the ultra-high steep side slope as claimed in claim 1, characterized in that the construction method comprises the following steps:

constructing a retaining wall section by section from bottom to top, constructing at least two rows of anchor cables of a first construction section, anchoring one end of the anchor cable of the first construction section in a slope rock, binding retaining wall reinforcing steel bars of the first construction section, erecting a template of the first construction section, penetrating the other end of the anchor cable of the first construction section through the retaining wall reinforcing steel bars of the first construction section, extending out of the template and fixing on the template of the first construction section, enabling each row of anchor cables to be distributed at intervals along the length direction of the template, stretching the anchor cable through prestress, and pouring retaining wall concrete of the first construction section by fixing the template of the first construction section;

and constructing an anchor cable of the next construction section, a retaining wall steel bar of the next construction section, a template of the next construction section and retaining wall concrete of the next construction section, and repeating the steps until the construction of the whole retaining wall is completed.

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