CN109914440B - Construction method of w-type high-capacity anti-slip structure - Google Patents
Construction method of w-type high-capacity anti-slip structure Download PDFInfo
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Abstract
The construction method of the w-type large-capacity anti-slip structure is used for greatly improving the anti-slip capacity of the anti-slip pile and reducing the risk of landslide generation. The anti-skid device comprises anti-skid bodies which are longitudinally and transversely arranged at intervals along the sliding direction of the skid bodies in rows, wherein each anti-skid body comprises anti-skid piles constructed at the lower part of a construction well, each anti-skid pile vertically extends for a certain height in the skid body and the skid bed near the skid belt, and the anti-skid piles in two adjacent rows of anti-skid bodies are staggered on a plane. And connecting beams which are fixedly connected with the sliding blocks and exert prestress are arranged between the upper and lower adjacent anti-sliding piles in the sliding body, so that a three-dimensional integral anti-sliding structure is formed. And a three-dimensional drainage system is constructed at the upper part of the construction well and in the adjacent slide body, and underground water and lower water in the slide body are collected and drained outside the ground.
Description
Technical Field
The invention relates to a high-capacity anti-skid structure in civil engineering, in particular to a w-type high-capacity anti-skid structure and a construction method thereof.
Background
Landslide can cause very big threat to engineering safety, adopts reasonable engineering measure to administer landslide and is the important calamities renovation technique in geotechnical engineering, and the most effective traditional engineering measure of handling landslide is to adopt slide-resistant pile and integrated configuration, and his principle is mainly through slide-resistant pile's lateral resistance the landslide thrust that produces because the sliding body slides down, guarantees that the landslide body is stable. However, the traditional anti-slide pile still has the defects that the pile section is too large, the pile body section is required to be large for resisting landslide thrust, even a plurality of rows of piles are required to be supported simultaneously, so that the construction cost is high, and the construction period is long; in addition, single stake atress is uneven, and every stake is independent setting, and the sliding body is very likely to lead to whole destruction because of after local destruction when sliding, makes whole slide resistant pile structure inefficacy.
A great deal of researches are carried out on the anti-slip structure by engineering personnel at home and abroad, the combination form of the pile structure is changed, the integral rigidity of the structure is improved, the stress rationality is improved, and the cost and the function are slightly changed. For example, the traditional anti-slide piles are changed into door-shaped piles, chair-type piles, bent piles, h-shaped piles and the like through connecting beams, the main functions of the structure are resisting landslide thrust, the integral rigidity of the structure is improved to a certain extent, but the cost is not greatly saved, and the construction difficulty is increased.
Disclosure of Invention
The invention aims to solve the technical problem of providing a construction method of a w-type large-capacity anti-slip structure so as to greatly improve the anti-slip capacity of an anti-slip pile and reduce the risk of landslide generation.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention relates to a construction method of a w-type high-capacity anti-slip structure, which comprises anti-slip bodies arranged in rows at intervals longitudinally and transversely along the slip direction of the slip bodies, and is characterized in that: the anti-slip body comprises anti-slip piles constructed at the lower part of a construction well, each anti-slip pile vertically extends to a certain height in the slip body and the slip bed near the slip belt, and the anti-slip piles in two adjacent rows of anti-slip bodies are distributed in a staggered manner on a plane; a connecting beam which is fixedly connected with each upper and lower adjacent anti-skid pile and applies prestress is arranged between each upper and lower adjacent anti-skid piles in the skid body to form a three-dimensional integral anti-skid structure; a three-dimensional drainage system is constructed at the upper part of the construction well and in the adjacent slide body, and underground water and lower seepage water in the slide body are collected and drained out of the ground;
the two ends of the connecting beam are fixedly connected with the top end of the anti-slide pile into a whole, steel strands for applying prestress are arranged in the connecting beam, stress sensors are arranged on the steel strands, and an overhaul channel leading from the top end of the anti-slide pile to the ground is arranged in the construction well;
the three-dimensional drainage system consists of a three-dimensional water collecting structure, a water collecting well and a water pumping device; the three-dimensional water collecting structure is formed by arranging drainage blind pipes at longitudinal intervals and circumferential intervals along a construction well, wherein the drainage blind pipes are distributed in a dendritic mode, the lower end construction wells of the drainage blind pipes are communicated, and extend upwards in a tilting mode in a sliding body, and the tilting angle is 15-20 degrees;
the water collecting well is formed by broken stone or sand pebble filled in a cavity between the inner wall of the construction well and the outer wall of the overhaul channel, and the water pumping device is arranged at the bottom of the water collecting well; the upper port of the water collecting well is closed by a fixed cover plate, and a movable cover plate for closing the upper port of the overhaul channel is arranged;
the construction method comprises the following steps:
(1) excavating a construction well to a designed elevation;
(2) excavating a connecting beam construction channel, and communicating each upper and lower adjacent construction wells at the designed elevation;
(3) constructing a connecting beam, installing a connecting beam reinforcement cage in a connecting beam construction channel, fixing a steel strand on which a stress sensor is installed, pouring connecting beam concrete, and applying prestress to the connecting beam through the steel strand after the connecting beam concrete reaches the design strength;
(4) constructing an anti-slide pile, installing an anti-slide pile reinforcement cage at the lower part of the construction well, firmly connecting the anti-slide pile reinforcement cage with a connecting beam reinforcement cage, and pouring anti-slide pile concrete;
(5) constructing a three-dimensional water collecting structure, drilling inclined holes in the upper layer of a construction well and the sliding body at intervals in the circumferential direction, and inserting drainage blind pipes into the inclined holes;
(6) a steel pile casing leading to the ground is arranged at the central part of the top surface of the slide-resistant pile, and a maintenance ladder is welded and fixed on the inner wall of the steel pile casing;
(7) constructing a water collecting well, filling broken stone or sand pebble into a cavity between the outer wall of the steel casing and the inner wall of the construction well to form the water collecting well, and installing a water pumping device at the bottom of the water collecting well;
(8) and a fixed cover plate for sealing the upper port of the water collecting well and a movable cover plate for sealing the upper port of the overhaul channel are arranged on the ground.
The beneficial effects of the invention are mainly reflected in the following aspects:
1. connecting beams which are fixedly connected with the sliding piles and apply prestress are arranged between the upper and lower adjacent sliding piles in the sliding body to form a three-dimensional integral sliding-resistant structure, so that the sliding resistance of the sliding-resistant structure is greatly improved;
2. a three-dimensional drainage system is built at the upper part of the construction well and in the adjacent slide body, and underground water and lower water in the slide body are collected and drained out of the ground, so that the risk of landslide is greatly reduced;
3. each anti-slide pile directly acts on the slide belt, so that a large amount of reinforced concrete materials are saved, and the engineering cost can be greatly reduced;
4. steel strands are distributed in the connecting beam, and stress sensors are arranged on the steel strands, so that the state of the sliding body can be monitored to a certain extent;
5. the upper part of the construction well is provided with an overhaul channel leading to the top surface of the anti-skid pile, and the steel stranded wires can be subjected to repair tensioning in the overhaul channel to maintain the connecting beam, so that the service life of the anti-skid structure is prolonged.
Drawings
The specification includes the following six figures:
FIG. 1 is a cross-sectional view of a w-type high capacity slide blocking structure of the present invention;
FIG. 2 is a plan view of a w-type high-capacity slip resistant structure of the present invention;
FIG. 3 is a schematic view of a construction mode of the w-type high-capacity anti-skid structure of the invention;
FIG. 4 is a cross-sectional view of a tie beam in a w-type high capacity slip resistant structure of the present invention;
FIG. 5 is a longitudinal cross-sectional view of a water collection well and a three-dimensional drainage system in a w-type high-capacity slip resistant structure of the present invention;
FIG. 6 is a cross-sectional view of a water collection well of the w-type high capacity slip resistant structure of the present invention.
The component names and corresponding labels are shown: the construction system comprises a sliding bed 10, a sliding body 11, a sliding belt F, a construction well 12, a connecting beam construction channel 13, an anti-sliding pile 20, a drainage blind pipe 21, a steel pile casing 22, an overhaul channel 23, a maintenance ladder 24, a fixed cover plate 24, a water collecting well 25, a movable cover plate 26, a connecting beam 30 and a prefabricated assembled pipe piece 31.
Description of the embodiments
The invention will be further described with reference to the drawings and examples.
Referring to fig. 1, 2 and 5, the w-type high-capacity slide blocking structure of the present invention includes slide blocking bodies arranged in a row at intervals longitudinally and transversely along a sliding direction of the slide 11. The anti-slip bodies comprise anti-slip piles 20 constructed at the lower part of the construction well 12, each anti-slip pile 20 vertically extends to a certain height in the slip body 11 and the slip bed 10 near the slip belt F, and the anti-slip piles 20 in two adjacent rows of anti-slip bodies are distributed in a staggered manner on a plane. And connecting beams 30 fixedly connected with the sliding piles and applying prestress are arranged between the upper and lower adjacent sliding piles 20 in the sliding body 11 to form a three-dimensional integral sliding-resistant structure, so that the sliding resistance of the sliding-resistant structure is greatly improved. Each slide-resistant pile 20 directly acts on the slide belt F, so that a large amount of reinforced concrete materials are saved, and the engineering cost can be greatly reduced. And a three-dimensional drainage system is constructed at the upper part of the construction well 12 and in the adjacent sliding body 11, and underground water and downflowing water in the sliding body 11 are collected and drained out of the ground, so that the risk of landslide is greatly reduced.
Referring to fig. 1, two ends of the connecting beam 30 are fixedly connected with the top end of the slide-resistant pile 20, steel strands for applying prestress are arranged in the connecting beam 30, and stress sensors are arranged on the steel strands, so that the state of the slide body can be monitored to a certain extent. An overhaul channel 23 leading to the ground from the top end of the slide-resistant pile 20 is arranged in the construction well 12, and the steel stranded wires can be subjected to tensioning in the overhaul channel to maintain the connecting beam, so that the service life of the slide-resistant structure is prolonged.
Referring to fig. 1, 5 and 6, the three-dimensional drainage system is composed of a three-dimensional water collecting structure, a water collecting well 25 and a water pumping device. The three-dimensional water collecting structure is formed by arranging drainage blind pipes 21 at longitudinal intervals and annular intervals along the construction well 12, the drainage blind pipes are distributed in a dendritic mode, the lower end construction well 12 of each drainage blind pipe 21 is communicated, and the drainage blind pipes extend upwards in a tilting mode in the sliding body 11, and the tilting angle is 15-20 degrees. The water collecting well 25 is formed by broken stone or sand pebble filled in a cavity between the inner wall of the construction well 12 and the outer wall of the overhaul channel 23, and the water pumping device is arranged at the bottom of the water collecting well 25. The upper port of the water collection well 25 is closed by a fixed cover plate 26, and a movable cover plate 27 closing the upper port of the service passage 23 is provided.
Referring to fig. 1 and 3, the construction method of the w-type large-capacity anti-slip structure of the invention comprises the following steps:
excavating a construction well 12 to a designed elevation;
(2) excavating a connecting beam construction channel 13, and communicating each upper and lower adjacent construction wells 12 at the designed elevation;
(3) constructing a connecting beam 30, installing a connecting beam reinforcement cage in a connecting beam construction channel 13, fixing a steel strand on which a stress sensor is installed, pouring connecting beam concrete, and applying prestress to the connecting beam 30 through the steel strand after the connecting beam concrete reaches the design strength;
(4) a slide-resistant pile 20 is constructed, a slide-resistant pile reinforcement cage is arranged at the lower part of a construction well 12 and is firmly connected with a connecting beam reinforcement cage, and slide-resistant pile concrete is poured;
(5) constructing a three-dimensional water collecting structure, drilling upward inclined holes in the upper layer of a construction well 12 and the sliding body 11 at intervals in the circumferential direction, and inserting drainage blind pipes 21 into the upward inclined holes;
(6) a construction maintenance channel 23, wherein a steel pile casing 22 leading to the ground is arranged at the central part of the top surface of the slide-resistant pile 20, and a maintenance ladder 24 is welded and fixed on the inner wall of the steel pile casing 22;
(7) constructing a water collecting well 25, filling broken stone or sand and pebble into a cavity between the outer wall of the steel casing 22 and the inner wall of the construction well 12 to form the water collecting well 25, and installing a water pumping device at the bottom of the water collecting well 25;
(8) a fixed cover plate 26 closing the upper port of the water collecting well 25 and a movable cover plate 27 closing the upper port of the service passage 23 are installed at the ground.
Referring to fig. 4, in the step (2), the excavation of the connecting beam construction channel 13 is performed in the order of excavating a segment by segment, and the support is formed by assembling prefabricated assembled segments 31 in a full ring.
The foregoing is provided by way of illustration of the principles of the construction method of the w-type high-capacity anti-skid structure of the present invention, and is not intended to limit the invention to the specific structure and application scope of the invention shown and described, so that all possible modifications and equivalents thereof may be resorted to, falling within the scope of the invention as defined by the appended claims.
Claims (2)
- The construction method of the 1.w type high-capacity anti-slip structure comprises anti-slip bodies which are longitudinally and transversely arranged at intervals along the sliding direction of a slip body (11), wherein each anti-slip body comprises anti-slip piles (20) constructed at the lower part of a construction well (12), each anti-slip pile (20) vertically extends for a certain height in the slip body (11) and the slip bed (10) near a slip belt (F), and the anti-slip piles (20) in two adjacent anti-slip bodies are staggered on a plane; a connecting beam (30) which is fixedly connected with the sliding body and applies prestress is arranged between each upper and lower adjacent anti-sliding piles (20) in the sliding body (11) to form a three-dimensional integral anti-sliding structure; a three-dimensional drainage system is built in the upper part of the construction well (12) and the adjacent sliding body (11), and underground water and lower seepage water in the sliding body (11) are collected and drained out of the ground;the two ends of the connecting beam (30) are fixedly connected with the top end of the slide-resistant pile (20) into a whole, steel strands for applying prestress are arranged in the connecting beam (30), stress sensors are arranged on the steel strands, and an overhaul channel (23) leading from the top end of the slide-resistant pile (20) to the ground is arranged in the construction well (12);the three-dimensional drainage system consists of a three-dimensional water collecting structure, a water collecting well (25) and a water pumping device; the three-dimensional water collecting structure is formed by arranging drainage blind pipes (21) at intervals along the longitudinal direction and the circumferential direction of a construction well (12), wherein the drainage blind pipes are distributed in a dendritic shape, the construction well (12) at the lower end of each drainage blind pipe (21) is communicated, and the drainage blind pipes extend upwards in a tilting direction in a sliding body (11), and the tilting angle is 15-20 degrees;the water collecting well (25) is formed by broken stone or sand pebble filled in a cavity between the inner wall of the construction well (12) and the outer wall of the overhaul channel (23), and the water pumping device is arranged at the bottom of the water collecting well (25); the upper port of the water collecting well (25) is closed by a fixed cover plate (26), and a movable cover plate (27) for closing the upper port of the overhaul channel (23) is arranged;the construction method comprises the following steps:(1) excavating a construction well (12) to a designed elevation;(2) excavating a connecting beam construction channel (13), and communicating each upper and lower adjacent construction wells (12) at the designed elevation;(3) constructing a connecting beam (30), installing a connecting beam reinforcement cage in a connecting beam construction channel (13), fixing a steel strand on which a stress sensor is installed, pouring connecting beam concrete, and applying prestress to the connecting beam (30) through the steel strand after the connecting beam concrete reaches the design strength;(4) the construction of the anti-slide pile (20), the installation of the anti-slide pile reinforcement cage at the lower part of the construction well (12), and firmly connecting the anti-slide pile reinforcement cage with the tie beam reinforcement cage, and pouring anti-slide pile concrete;(5) constructing a three-dimensional water collecting structure, drilling inclined holes in the upper layer and the annular interval sliding body (11) of a construction well (12), and inserting drainage blind pipes (21) into the inclined holes(6) A construction maintenance channel (23), a steel pile casing (22) leading to the ground is arranged at the central part of the top surface of the slide-resistant pile (20), and a maintenance ladder (24) is welded and fixed on the inner wall of the steel pile casing (22);(7) constructing a water collecting well (25), filling broken stone or sand and pebble into a cavity between the outer wall of the steel casing (22) and the inner wall of the construction well (12) to form the water collecting well (25), and installing a water pumping device at the bottom of the water collecting well (25);(8) a fixed cover plate (26) for closing the upper port of the water collecting well (25) and a movable cover plate (27) for closing the upper port of the overhaul channel (23) are arranged on the ground.
- 2. The construction method of the w-type high-capacity anti-slip structure according to claim 1, wherein the construction method comprises the following steps: in the step (2), the excavation of the connecting beam construction channel (13) is carried out according to the sequence of excavating a section of support by a section, and the support is formed by splicing prefabricated spliced duct pieces (31) in a full ring.
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| CN111021369A (en) * | 2019-12-31 | 2020-04-17 | 深圳宏业基岩土科技股份有限公司 | Chair type double-row pile anchor construction method |
| CN117702782A (en) * | 2024-01-26 | 2024-03-15 | 成都信息工程大学 | Construction method for reinforcing triangular combined pile slope with soil arch and pile group effects |
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