阅读说明：本技术 一种装配式预应力路基结构及施工工法 (Assembled prestressed roadbed structure and construction method ) 是由 赵文辉 苏谦 李波 王宇 李�昊 于 2019-08-30 设计创作，主要内容包括：本发明涉及一种装配式预应力路基结构,该结构包括碎石垫层、混凝土底座、轻质混凝土砌块、轻质混凝土垫块和上部填料层。碎石垫层由下部和上部构成；混凝土底座中心设上部,其上设轻质混凝土砌块、上部填料层；混凝土底座两端设预制槽,预制槽内嵌钢筋混凝土预制板；两个钢筋混凝土预制板之间设轻质混凝土砌块；相邻两个轻质混凝土砌块之间设现浇微膨胀高流动性砂浆；相邻两层轻质混凝土砌块之间设轻质混凝土垫块和钢索,该钢索两端固定在钢筋混凝土预制板上；最底层轻质混凝土砌块与上部及混凝土底座之间设防水土工布Ⅰ；最顶层轻质混凝土砌块与上部填料层之间设防水土工布Ⅱ。本发明还公开了该结构的施工工法。本发明结构稳定,可实现快速施工。(The invention relates to an assembled prestressed roadbed structure which comprises a gravel cushion layer, a concrete base, a light concrete building block, a light concrete cushion block and an upper packing layer. The gravel cushion layer consists of a lower part and an upper part; the center of the concrete base is provided with an upper part, on which a lightweight concrete block and an upper packing layer are arranged; two ends of the concrete base are provided with prefabricated grooves, and reinforced concrete prefabricated plates are embedded in the prefabricated grooves; a lightweight concrete block is arranged between the two reinforced concrete precast slabs; a cast-in-situ micro-expansion high-fluidity mortar is arranged between two adjacent light concrete building blocks; a light concrete cushion block and a steel cable are arranged between two adjacent layers of light concrete building blocks, and two ends of the steel cable are fixed on the reinforced concrete precast slab; waterproof geotextile I is arranged between the bottommost layer lightweight concrete block and the upper part and between the bottommost layer lightweight concrete block and the concrete base; and a waterproof geotextile II is arranged between the topmost light concrete block and the upper packing layer. The invention also discloses a construction method of the structure. The invention has stable structure and can realize rapid construction.)

1. An assembled prestressing force road bed structure which characterized in that: the structure comprises a gravel cushion layer (1), a concrete base (2), a lightweight concrete block (4), a lightweight concrete cushion block (6) and an upper packing layer (10); the gravel cushion (1) consists of a lower part (11) and an upper part (12); the upper part (12) is arranged in the center of the concrete base (2), and a plurality of layers of the lightweight concrete building blocks (4) and the upper packing layer (10) are sequentially arranged on the upper part; two ends of the concrete base (2) are provided with prefabricated grooves, and reinforced concrete prefabricated plates (3) are embedded in the prefabricated grooves; a plurality of light concrete blocks (4) which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs (3); cast-in-place micro-expansion high-fluidity mortar (5) is arranged between two adjacent lightweight concrete blocks (4); the lightweight concrete cushion blocks (6) and the steel cable (8) arranged in the steel cable sleeve (7) are respectively arranged between two adjacent layers of the lightweight concrete building blocks (4), and two ends of the steel cable (8) are fixed on the reinforced concrete precast slab (3); waterproof geotextile I (91) is arranged among the bottommost layer of the lightweight concrete building block (4), the upper part (12) and the concrete base (2); and a waterproof geotextile II (92) is arranged between the top lightweight concrete block (4) and the upper packing layer (10).

2. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the gravel cushion layer (1) adopts open-graded gravel with the grain diameter of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part (11) is 12-18 cm, and the thickness of the upper part (12) is the same as the height of the concrete base (2).

3. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the distance between the precast groove and the plate outer boundary of the concrete base (2) is not less than 20cm, and the distance between the precast groove and the plate inner boundary is not less than 50 cm; the height is not less than 20 cm.

4. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the reinforced concrete precast slab (3) is coated with organic silicon waterproof paint, the size of the reinforced concrete precast slab is 1m high by 1m wide by 0.15m thick, the two transverse sides of the reinforced concrete precast slab are grooves, the two longitudinal sides of the reinforced concrete precast slab are bulges, and the middle of the reinforced concrete precast slab is provided with an anchor cable hole; the anchor cable holes are connected with the steel cable (8).

5. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the waterproof geotextile I (91) is fully paved and is higher than the surface of the upper part (12) by more than 10 cm.

6. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the waterproof geotextile II (92) transversely exceeds the lightweight concrete building block (4) by at least 0.1 m.

7. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the size of the light concrete blocks (4) is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing of every two light concrete blocks (4) is 2-3 cm.

8. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: 4 light concrete cushion blocks (6) are placed on the lower portion of one light concrete block (4), and the light concrete cushion blocks (6) are placed on the lower portion of the position 1/4 inside the side length of the light concrete block (4) on the upper portion; the size of the light concrete cushion block (6) is 0.1m long by 0.1m wide by 0.02-0.03 m high.

9. A fabricated prestressed roadbed structure as claimed in claim 1, wherein: the design strength of the cast-in-situ micro-expansion high-fluidity mortar (5) is the same as that of the lightweight concrete block (4), and the mass mixture ratio is as follows: mineral powder: fine aggregate: swelling agent: water reducing agent: water =10% ~ 13%: 8% -11%: 68% -72%: 2% -2.5%: 0.33% -0.37%: 7% -7.5%; the cement is ordinary Portland cement with the strength grade of 42.5; the swelling agent is a UEA swelling agent.

10. A construction method of an assembled prestressed roadbed structure as claimed in claim 1, comprising the steps of:

the construction method comprises the steps of adopting open grading gravel with the grain diameter of 1cm, enabling the permeability coefficient to be larger than 0.5cm/s, constructing the lower part (11) of a gravel cushion layer (1), and paving the gravel cushion layer to be 12-18 cm thick;

constructing the concrete base (2):

adopting factory building prefabrication manufacturing; two ends of the concrete base (2) are provided with prefabricated grooves, and the center of the concrete base is provided with a groove; the distance between the precast groove and the plate outer boundary of the concrete base (2) is not less than 20cm, and the distance between the precast groove and the plate inner boundary is not less than 50 cm; the height is not less than 20 cm;

thirdly, open graded broken stones with the particle size of 1cm are adopted in the grooves, the permeability coefficient is larger than 0.5cm/s, the upper part (12) of the broken stone cushion layer (1) is constructed, and the laying thickness is the same as the height of the concrete base (2);

fourthly, paving a waterproof geotextile I (91) on the upper portion (12) and the concrete base (2) in a full-paved mode, wherein the waterproof geotextile I is higher than the surface of the upper portion (12) by more than 10 cm; when the waterproof geotextile I (91) needs to be lapped, organic silicon waterproof coating is adopted for lapping, and the lapping width exceeds 10 cm;

fifthly, manufacturing a reinforced concrete precast slab (3) with the size of 1m high, 1m wide and 0.15m thick, wherein grooves are formed in the two transverse sides of the precast slab, protrusions are formed in the two longitudinal sides of the precast slab, and anchor cable holes are formed in the middle of the precast slab; installing the reinforced concrete precast slab (3) into the precast trough on site through a small crane; after the installation is finished, smearing organic silicon waterproof paint between the longitudinal direction and the transverse direction; when an anchor cable is arranged, an anchor cable hole is pre-embedded in the middle of the precast slab in advance, and reinforcing steel bars are integrally reinforced; after the position is determined, the outer side is positioned by adopting a steel pipe frame;

sixthly, constructing a lightweight concrete block (4):

the product is prepared by factory prefabrication and maintenance, and the size is 0.5m long by 0.5m wide by 0.48m high; when laying is carried out, the building blocks are constructed in a layered mode and placed in a staggered mode, and the longitudinal and transverse spacing of the building blocks is 2-3 cm;

putting-on-lightweight concrete pad (6):

the light concrete cushion block (6) is formed by cutting the leftover materials of the light concrete building blocks (4), the size of the light concrete cushion block is 0.1m long by 0.1m wide by 0.02-0.03 m high, 4 cushion blocks are placed on the lower portion of one building block, and the cushion blocks are placed on the lower portion of the position 1/4 in the side length of the upper building block;

and placing a wire sleeve (7):

the light concrete cushion blocks (6) are laid simultaneously, and redundant gaps are blocked through anchor cable holes in the reinforced concrete precast slabs (3);

the self-drilling carries out the construction of the cast-in-situ micro-expansion high-fluidity mortar (5) according to the design strength:

firstly, spraying water to the lightweight concrete block (4); pouring the upper-layer cement mortar after the initial setting of the lower-layer mortar is finished;

carrying out the construction of the self-skin according to the step of the self-skin according to the design requirement until the design elevation is achieved;

laying waterproof geotextile II (92) on the top-most lightweight concrete block (4) and enabling the waterproof geotextile II to transversely exceed the lightweight concrete block (4) by at least 0.1 m; the lapping mode is the same as that of the waterproof geotextile I (91);

placing a steel rope (8) in the steel rope sleeve (7), applying prestress and checking stress relaxation regularly;

the upper filler layer (10) is filled in a manner of paving and rolling, and the filler is A, B groups of fillers.

Technical Field

The invention relates to the technical field of rapid construction of high embankments in special soil areas, in particular to an assembled prestressed roadbed structure and a construction method.

Background

At present, when a high embankment in a special soil area is designed by adopting traditional filling materials and processes, the problems of large sedimentation, long consolidation time, poor stability, large occupied area and the like exist, and the problems of large workload, high manufacturing cost and the like exist; when cast-in-place light soil is adopted for filling, the problems of cement dust, hydration heat, pouring layering segregation and the like are easy to occur.

Disclosure of Invention

The invention aims to solve the technical problem of providing an assembled prestressed roadbed structure which is stable in structure and rapid in construction.

The invention also provides a construction method of the fabricated prestressed roadbed structure.

In order to solve the above problems, the present invention provides an assembled prestressed foundation structure, which is characterized in that: the structure comprises a gravel cushion layer, a concrete base, a light concrete block, a light concrete cushion block and an upper packing layer; the gravel cushion layer consists of a lower part and an upper part; the center of the concrete base is provided with the upper part, and a plurality of layers of the light concrete blocks and the upper part packing layer are sequentially arranged on the upper part; two ends of the concrete base are provided with prefabricated grooves, and reinforced concrete prefabricated plates are embedded in the prefabricated grooves; a plurality of layers of light concrete blocks which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs; cast-in-place micro-expansion high-fluidity mortar is arranged between every two adjacent lightweight concrete blocks; the light concrete cushion blocks and the steel cable arranged in the steel cable sleeve are respectively arranged between two adjacent layers of the light concrete building blocks, and two ends of the steel cable are fixed on the reinforced concrete precast slab; waterproof geotextile I is arranged among the light concrete building blocks on the bottommost layer, the upper part and the concrete base; and a waterproof geotextile II is arranged between the light concrete block at the topmost layer and the upper packing layer.

The broken stone cushion layer adopts open-graded broken stones with the grain size of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part of the concrete base is 12-18 cm, and the thickness of the upper part of the concrete base is the same as the height of the concrete base.

The distance between the precast groove and the outer boundary of the concrete base plate is not less than 20cm, and the distance between the precast groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm.

The reinforced concrete precast slab is coated with organic silicon waterproof paint, the size of the reinforced concrete precast slab is 1m high by 1m wide by 0.15m thick, the two transverse sides of the reinforced concrete precast slab are grooves, the two longitudinal sides of the reinforced concrete precast slab are bulges, and the middle of the reinforced concrete precast slab is provided with an anchor cable hole; the anchor cable holes are connected with the steel cable.

The waterproof geotextile I is fully paved and is higher than the upper surface by more than 10 cm.

The waterproof geotextile II transversely exceeds the lightweight concrete building block by at least 0.1 m.

The size of the light concrete blocks is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing between every two light concrete blocks is 2-3 cm.

4 light concrete cushion blocks are placed on the lower portion of one light concrete block, and the light concrete cushion blocks are placed on the lower portion of the side length inner 1/4 position of the light concrete block on the upper portion; the size of the light concrete cushion block is 0.1m long by 0.1m wide by 0.02-0.03 m high.

The cast-in-place micro-expansion high-fluidity mortar has the same design strength as the lightweight concrete building block, and the mass mixture ratio of the mortar is as follows: mineral powder: fine aggregate: swelling agent: water reducing agent: water =10% ~ 13%: 8% -11%: 68% -72%: 2% -2.5%: 0.33% -0.37%: 7% -7.5%; the cement is ordinary Portland cement with the strength grade of 42.5; the swelling agent is a UEA swelling agent.

The construction method of the assembled pre-stressed roadbed structure comprises the following steps:

the method comprises the steps of adopting open grading gravel with the particle size of 1cm, enabling the permeability coefficient to be larger than 0.5cm/s, performing lower construction on a gravel cushion layer, and paving the gravel cushion layer with the thickness of 12-18 cm;

constructing a concrete base:

adopting factory building prefabrication manufacturing; two ends of the concrete base are provided with prefabricated grooves, and the center of the concrete base is provided with a groove; the distance between the precast groove and the outer boundary of the concrete base plate is not less than 20cm, and the distance between the precast groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm;

thirdly, open-graded broken stones with the particle size of 1cm are adopted in the grooves, the permeability coefficient is larger than 0.5cm/s, the upper construction of the broken stone cushion layer is carried out, and the paving thickness is the same as the height of the concrete base;

fourthly, a full-spread mode is adopted, waterproof geotextile I is laid on the upper portion and the concrete base, and the waterproof geotextile I is higher than the surface of the upper portion by more than 10 cm; when the waterproof geotextile I needs to be lapped, organic silicon waterproof coating is adopted for lapping, and the lapping width exceeds 10 cm;

fifthly, manufacturing a reinforced concrete prefabricated plate with the size of 1m high, 1m wide and 0.15m thick, wherein grooves are formed in the two transverse sides of the prefabricated plate, protrusions are formed in the two longitudinal sides of the prefabricated plate, and anchor cable holes are formed in the middle of the prefabricated plate; installing the reinforced concrete precast slab into the precast groove through a small crane on site; after the installation is finished, smearing organic silicon waterproof paint between the longitudinal direction and the transverse direction; when an anchor cable is arranged, an anchor cable hole is pre-embedded in the middle of the precast slab in advance, and reinforcing steel bars are integrally reinforced; after the position is determined, the outer side is positioned by adopting a steel pipe frame;

sixthly, constructing the lightweight concrete building blocks:

the product is prepared by factory prefabrication and maintenance, and the size is 0.5m long by 0.5m wide by 0.48m high; when laying is carried out, the building blocks are constructed in a layered mode and placed in a staggered mode, and the longitudinal and transverse spacing of the building blocks is 2-3 cm;

putting lightweight concrete pad:

the lightweight concrete cushion block is formed by cutting the leftover materials of the lightweight concrete block, the size of the lightweight concrete cushion block is 0.1m long x 0.1m wide x 0.02-0.03 m high, 4 cushion blocks are placed on the lower portion of one block, and the cushion blocks are placed on the lower portion of the position 1/4 in the side length of the upper block;

placing the wire rope sleeve:

finishing the laying of the lightweight concrete cushion blocks at the same time, and plugging redundant gaps through anchor cable holes in the reinforced concrete precast slabs;

the self-skin carries out the construction of the cast-in-situ micro-expansion high-fluidity mortar according to the design strength:

firstly, spraying water to the lightweight concrete building block; pouring the upper-layer cement mortar after the initial setting of the lower-layer mortar is finished;

carrying out the construction of the self-skin according to the step of the self-skin according to the design requirement until the design elevation is achieved;

laying waterproof geotextile II on the top lightweight concrete block, and enabling the geotextile II to transversely exceed the lightweight concrete block by at least 0.1 m; the lapping mode is the same as that of the waterproof geotextile I;

placing a steel cable in the steel cable sleeve, applying prestress, and periodically checking stress relaxation;

the upper filler layer is filled in a mode of first paving and then rolling, and the filler is A, B groups of fillers.

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

the invention utilizes the advantages of light weight, high strength and no need of compacting and backfilling of the lightweight concrete material, and utilizes the prefabricated lightweight concrete building block factory building to directly build a main body on site, the gap adopts cast-in-situ micro-expansion high-fluidity mortar material to build an integral structure, and the combination of a steel cable system and related auxiliary structures can reduce the additional stress generated by the high embankment filling in special areas to the foundation, and the prestress is applied to the upper and lower positions to ensure the dynamic stability and the integral structure stability of the upper part, simultaneously achieve the purpose of rapid construction, and have no problems of cast-in-situ lightweight soil hydration heat, casting height and the like.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view of the present invention.

Fig. 2 is a construction layout view of the lightweight concrete block of the present invention.

In the figure: 1-a gravel cushion layer; 11-lower part; 12-upper part; 2-a concrete base; 3-precast reinforced concrete slab; 4-light concrete building blocks; 5, casting micro-expansion high-fluidity mortar in situ; 6-light concrete cushion block; 7-steel cable sleeve; 8-a steel cord; 91-waterproof geotextile I; 92-waterproof geotextile II; 10 — upper packing layer.

Detailed Description

As shown in fig. 1 and 2, the prefabricated prestressed roadbed structure comprises a gravel cushion layer 1, a concrete base 2, a lightweight concrete block 4, a lightweight concrete cushion block 6 and an upper packing layer 10.

The gravel cushion layer 1 consists of a lower part 11 and an upper part 12; the center of the concrete base 2 is provided with an upper part 12, which is sequentially provided with a plurality of layers of light concrete blocks 4 and an upper packing layer 10; two ends of the concrete base 2 are provided with prefabricated grooves, and reinforced concrete prefabricated plates 3 are embedded in the prefabricated grooves; a plurality of layers of light concrete blocks 4 which are arranged in a staggered manner are arranged between the two reinforced concrete precast slabs 3; a cast-in-situ micro-expansion high-fluidity mortar 5 is arranged between two adjacent lightweight concrete blocks 4; a lightweight concrete cushion block 6 and a steel cable 8 arranged in a steel cable sleeve 7 are respectively arranged between two adjacent layers of lightweight concrete building blocks 4, and two ends of the steel cable 8 are fixed on the reinforced concrete precast slab 3; waterproof geotextile I91 is arranged between the bottommost layer lightweight concrete block 4 and the upper part 12 and between the bottommost layer lightweight concrete block and the concrete base 2; and a waterproof geotextile II 92 is arranged between the topmost light concrete block 4 and the upper packing layer 10.

Wherein: the broken stone cushion layer 1 adopts open-graded broken stones with the grain diameter of 1cm, and the permeability coefficient is more than 0.5 cm/s; the thickness of the lower part 11 is 12-18 cm, and the thickness of the upper part 12 is the same as the height of the concrete base 2.

The distance between the prefabricated groove and the outer boundary of the concrete base 2 plate is not less than 20cm, and the distance between the prefabricated groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm.

The reinforced concrete precast slab 3 is coated with organosilicon waterproof coating, the size of the organosilicon waterproof coating is 1m high by 1m wide by 0.15m thick, the two transverse sides of the organosilicon waterproof coating are grooves, the two longitudinal sides are bulges, and the middle of the organosilicon waterproof coating is provided with anchor cable holes; the anchor cable holes are connected to the wire rope 8.

The waterproof geotextile I91 is fully paved and is higher than the 12 surface of the upper part by more than 10 cm.

The waterproof geotextile II 92 transversely exceeds the lightweight concrete block 4 by at least 0.1 m.

The size of the light concrete blocks 4 is 0.5m long by 0.5m wide by 0.48m high, and the longitudinal and transverse spacing between every two light concrete blocks 4 is 2-3 cm.

4 light concrete cushion blocks 6 are placed at the lower part of one light concrete block 4, and the light concrete cushion blocks 6 are placed at the lower part of 1/4 positions inside the side length of the upper light concrete block 4; the size of the light concrete cushion block 6 is 0.1m long by 0.1m wide by 0.02-0.03 m high.

The design strength of the cast-in-situ micro-expansion high-fluidity mortar 5 is the same as that of the lightweight concrete block 4, and the mass (kg) mixing ratio is as follows: mineral powder: fine aggregate: swelling agent: water reducing agent: water =10% ~ 13%: 8% -11%: 68% -72%: 2% -2.5%: 0.33% -0.37%: 7% -7.5%; the cement is ordinary Portland cement with the strength grade of 42.5; the swelling agent is a UEA swelling agent.

A construction method of an assembled pre-stressed roadbed structure comprises the following steps:

the construction method includes the steps that open-graded broken stones with the grain diameter of 1cm are adopted, the permeability coefficient is larger than 0.5cm/s, construction is carried out on the lower portion 11 of a broken stone cushion layer 1, and the paving thickness is 12-18 cm;

the concrete base 2 is constructed:

adopting factory building prefabrication manufacturing; two ends of the concrete base 2 are provided with prefabricated grooves, and the center of the concrete base is provided with a groove; the distance between the prefabricated groove and the outer boundary of the concrete base 2 plate is not less than 20cm, and the distance between the prefabricated groove and the inner boundary is not less than 50 cm; the height is not less than 20 cm;

thirdly, open-graded broken stones with the grain size of 1cm are adopted in the grooves, the permeability coefficient is larger than 0.5cm/s, the upper part 12 of the broken stone cushion layer 1 is constructed, and the paving thickness is the same as the height of the concrete base 2;

fourthly, paving a full-paved manner, paving waterproof geotextile I91 on the upper part 12 and the concrete base 2, and enabling the waterproof geotextile I91 to be higher than the surface of the upper part 12 by more than 10 cm; when the waterproof geotextile I91 needs to be lapped, organic silicon waterproof coating is adopted for lapping, and the lapping width exceeds 10 cm;

fifthly, manufacturing a reinforced concrete prefabricated plate 3 with the size of 1m high, 1m wide and 0.15m thick, wherein grooves are formed in the two transverse sides of the prefabricated plate, protrusions are formed in the two longitudinal sides of the prefabricated plate, and anchor cable holes are formed in the middle of the prefabricated plate; installing the reinforced concrete precast slab 3 into the precast groove through a small crane on site; after the installation is finished, smearing organic silicon waterproof paint between the longitudinal direction and the transverse direction; when an anchor cable is arranged, an anchor cable hole is pre-embedded in the middle of the precast slab in advance, and reinforcing steel bars are integrally reinforced; after the position is determined, the outer side is positioned by adopting a steel pipe frame;

sixthly, constructing a lightweight concrete block 4:

the lightweight concrete building block 4 is formed by factory prefabrication and maintenance, and the size is 0.5m long by 0.5m wide by 0.48m high; when laying is carried out, the building blocks are constructed in a layered mode and placed in a staggered mode, and the longitudinal and transverse spacing of the building blocks is 2-3 cm; when a smaller-size building block type is needed, the building block type can be obtained by cutting a large building block;

putting lightweight concrete pad 6:

the light concrete cushion block 6 is formed by cutting the leftover materials of the light concrete blocks 4, the size of the light concrete cushion block is 0.1m long by 0.1m wide by 0.02-0.03 m high, 4 cushion blocks are placed on the lower portion of one block, and the cushion blocks are placed on the lower portion of the position 1/4 in the side length of the upper block;

placing the wire sleeve 7:

the light concrete cushion blocks 6 are laid simultaneously, and redundant gaps are blocked through anchor cable holes in the reinforced concrete precast slabs 3;

the self-skin is constructed by the cast-in-situ micro-expansion high-fluidity mortar 5 according to the design strength:

firstly, spraying water to the lightweight concrete block 4 to basically ensure that the surface of the block does not absorb water; pouring the upper layer of cement mortar after the initial setting of the lower layer of cement mortar is finished; the construction of the building blocks is not higher than that of the three layers of the pouring surface of the cast-in-situ micro-expansion high-fluidity mortar 5;

carrying out the step-step self-whitening construction alternately according to design requirements till reaching the designed elevation;

laying waterproof geotextile II 92 on the topmost lightweight concrete block 4, and enabling the waterproof geotextile II to transversely exceed the lightweight concrete block 4 by at least 0.1 m; the lapping mode is the same as that of the waterproof geotextile I91;

placing a steel cable 8 in a steel cable sleeve 7, applying prestress, and periodically checking stress relaxation;

the upper filler layer 10 is filled in a manner of paving and rolling, and the filler is A, B groups of fillers.