CN115030102A - Ecological wetland dam leakage plugging system based on passive self-inspection technology and construction method thereof - Google Patents

Abstract

The invention relates to an ecological wetland dam leakage plugging system and its construction method based on passive self-checking technology. At least one of the clay core wall and the anti-seepage layer of the dam foundation is provided with reaction piles arranged along the road length direction of the dam crest highway. The reaction ball is eccentrically arranged on the water-facing side of the first pile body. The reaction ball includes a spherical shell and a reaction port opened on the water-facing side. The reaction port is equipped with a pressure trigger that opens when the external pressure of the reaction ball is less than the set value. Mechanism, the reaction ball is filled with liquid retarding adhesive and/or liquid water blocking material doped with retarder. In the present invention, the pre-buried reaction ball is used as the leakage sensing element, and the reaction ball uses pressure as the trigger condition to fill the glue and plug the leakage, and the leakage in the dam body of the water conservancy project will change the leakage whether it is cracking leakage or degeneration leakage. The pressure characteristics of the point position, so this plugging method has the advantage of rapid response.

Description

Leakage plugging system and construction method of ecological wetland dam based on passive self-inspection technology

technical field

The invention belongs to the field of water conservancy engineering construction, and in particular relates to an ecological wetland dam leakage plugging system based on passive self-checking technology and a construction method thereof.

Background technique

At present, the dam body of water conservancy projects is affected by factors such as poor core wall construction quality and poor basic geological conditions. After a period of use, it is found that the core wall anti-seepage system and foundation grouting will be affected by geological movement, human factors, etc. crack. In the prior art, the repair method for the core wall is usually to build another anti-seepage wall, and chemically block the leakage caused by the foundation grouting construction. However, the above-mentioned plugging methods require reports and instructions from relevant personnel, and a period of reaction time. Therefore, temporary plugging and timely early warning after leakage has become the primary problem currently faced, and it is a key problem faced by water conservancy engineering agencies at all levels. .

SUMMARY OF THE INVENTION

The object of the present invention is to provide a kind of rapid response based on the passive self-checking technology of the ecological wetland dam leakage plugging system, and its technical scheme is as follows:

The leakage plugging system of ecological wetland dam based on passive self-inspection technology, including:

The clay core wall and the dam foundation anti-seepage layer below it, and at least one of the clay core wall and the dam foundation anti-seepage layer is provided with reaction piles arranged along the road length direction of the dam crest road, and the reaction piles include bionic self-healing cement mortar cast-in-place The formed first pile body and the reaction ball embedded in it. The reaction ball is eccentrically arranged on the water-facing side of the first pile body. The reaction ball includes a spherical shell and a reaction port opened on the water-facing side. The pressure trigger mechanism opened when the external pressure of the ball is lower than the set value, and the reaction ball is filled with liquid retarding adhesive and/or liquid water blocking material doped with retarder.

Further, rigid piles are arranged in parallel between two adjacent reaction piles, and the rigid piles and the reaction piles are alternately distributed in the road length direction of the dam crest road to form a self-reaction curtain isolated between the upstream and downstream surfaces of the dam body. .

Further, the upstream side of the reaction pile is located between the upstream side and the downstream side of the rigid pile, so that a guide groove is enclosed by the upstream side of the two adjacent rigid piles and the upstream side of the reaction pile between the two. .

Further, the lower end of the rigid pile is not lower than the reaction pile, and the rigid pile includes a second pile body and an electric heating rod embedded therein, wherein,

The electric heating rod is a metal rod. The upper end of the electric heating rod is exposed from the second pile body, and the lower end is flush with the lower end of the second pile body. The exposed part is connected with a vibration sensor, and the vibration sensor is connected with an alarm when the vibration amplitude or vibration frequency exceeds the threshold. the alarm device;

The second pile body includes bulk material, grouting material and polyurethane material. The polyurethane material is mixed in the bulk material and driven together and heated to a fluid state during the pouring process of the grouting material, and cooled to a solid state after the grouting material is poured.

Further, the pressure triggering mechanism includes a triggering unit and a blasting unit, the triggering unit is an electronically triggered pressure sensor and/or a delayed triggering mechanical pressure triggering mechanism, and a fuze of the blasting unit is connected to the triggering unit.

Further, the delayed-triggered mechanical pressure triggering mechanism includes a movable contact rod that is sealed and inserted in the reaction port, the front end of the contact rod is located in the reaction port or passes through the reaction port, and the rear end is provided with an armature segment, and the armature is provided with an armature section. A compression spring is connected to the back of the segment, the armature segment jacket is provided with an electromagnetic coil fixed on the spherical shell and magnetically connected with the armature segment, and the electromagnetic coil is electrically connected with a battery fixed on the spherical shell.

Another object of the present invention is to provide a kind of construction method specially used for the above-mentioned ecological wetland dam leakage plugging system based on passive self-checking technology, and its technical scheme is as follows:

A construction method comprising:

Drill holes in the clay core wall, the holes are arranged along the road length of the crest road, and the holes are located on the water-facing side of the anti-seepage wall;

The reaction ball is positioned on the water-facing side of the borehole. The reaction ball includes a spherical shell and a reaction port opened on the water-facing side. The reaction port is installed with a pressure that is in a locked state and opens when the pressure outside the reaction ball is less than the set value when unlocked. Trigger mechanism, the reaction ball is filled with liquid retarding adhesive and/or liquid water blocking material doped with retarder;

Filling grouting is carried out into the borehole, and the grouting material is bionic self-healing cement mortar;

After the grouting material has cured, the pressure trigger mechanism is unlocked.

Another object of the present invention is to provide another kind of construction method dedicated to the above-mentioned ecological wetland dam leakage plugging system based on passive self-checking technology, and its technical scheme is as follows:

Alternative construction methods include:

Drill holes on the anti-seepage layer of the dam foundation, the holes are arranged along the road length of the dam crest road, and the holes are located on the water-facing side of the anti-seepage curtain;

The reaction ball is positioned on the water-facing side of the borehole. The reaction ball includes a spherical shell and a reaction port opened on the water-facing side. The reaction port is installed with a pressure that is in a locked state and opens when the pressure outside the reaction ball is less than the set value when unlocked. Trigger mechanism, the reaction ball is filled with liquid retarding adhesive and/or liquid water blocking material doped with retarder;

Filling grouting is carried out into the borehole, and the grouting material is bionic self-healing cement mortar;

After the grouting material is solidified, the dam body construction is carried out on the anti-seepage layer of the dam foundation;

After the construction of the dam body, the pressure trigger mechanism is unlocked.

Beneficial effects of the present invention:

(1) In the present invention, the pre-buried reaction ball is used as the leakage sensing element, and the reaction ball uses pressure as the trigger condition to fill the glue and plug the leakage, and the leakage in the dam body of the water conservancy project is whether it is cracking leakage or denaturation leakage. , will change the pressure characteristics of the leak point position, so this plugging method has the advantage of rapid response;

(2) After the pressure is triggered, the reaction ball of the present invention bursts the water-facing side by blasting, thereby destroying the leakage point, on the one hand, the leakage is alleviated, and on the other hand, the plugging effect is improved by increasing the plugging area;

(3) The trigger unit of the present invention adopts the electromagnetic magnetic attraction powered by the battery to realize the locking of the trigger mechanism, and uses the power of the battery as the condition for controlling the delayed unlocking, thereby ensuring the controllable and adjustable delay time, and is economical .

Description of drawings

Fig. 1 is the schematic diagram of the water conservancy project dam body of the present invention;

Fig. 2 is the schematic diagram of reaction curtain in the dam leakage plugging structure of the present invention;

Fig. 3 is the schematic diagram of reaction chain in the dam leakage plugging structure of the present invention;

Fig. 4 is a schematic diagram of a post-reaction ball in the leakage plugging structure of a hydraulic engineering dam body according to the present invention.

Detailed ways

Example 1

As shown in FIG. 1 to FIG. 4 , this embodiment is suitable for clay core rockfill dams that are relatively common in current hydraulic engineering. In order to facilitate those skilled in the art to implement the technical solutions in this embodiment, in this embodiment, the The side of the dam body facing the drinking water storage structures such as channels and reservoirs is the water-facing surface, and the side opposite to the water-facing surface 110 is the back-water surface; Because the structure and technical effect of the ecological wetland dam leakage plugging system based on passive self-inspection technology in this embodiment depends on its construction process, this embodiment mainly introduces the ecological wetland based on passive self-inspection technology. The construction method of the seepage sealing system of the wetland dam is the main method. For the structure of the leakage sealing structure of the dam body of the water conservancy project, the molding structure recorded in the construction method shall prevail. However, limited by the factors that can only be described by enumeration in the embodiment, the applicant believes that in order to realize a molding structure, the technical solutions of other common processes in the field should also belong to the same technology as this embodiment. The scheme belongs to the protection scope of the claims with the theme of "Ecological Wetland Dam Seepage Sealing System Based on Passive Self-Inspection Technology".

The construction method of the leakage plugging system for ecological wetland dams based on the passive self-checking technology in this embodiment is to carry out the reinforcement construction of secondary construction on the clay core wall of the existing clay core rockfill dam, so it is essentially It is a construction method for a seepage sealing structure based on the reinforcement of a clay core wall of a clay core rockfill dam, and the specific steps are as follows:

S100 , drilling holes on the clay core wall 800 , the drilling holes are arranged along the road length of the dam crest road, and the drilling holes are located on the water-facing side of the anti-seepage wall 300 .

Among them, the drilling process includes:

S110, firstly drill a row of reaction holes along the road length direction of the dam crest highway, the reaction holes are distributed at equal intervals, and the bottoms of the reaction holes extend to the concrete base 700 below the clay core wall 800;

S120, a pile hole is drilled between two adjacent reaction holes, the diameter of the pile hole is 1.5-3 times the diameter of the reaction hole, and the bottom of the pile hole also extends to the concrete base 700 below the clay core wall 800. The left and right sides of the dam intersect with the reaction holes and are symmetrical to each other, so that the reaction ditch is formed by the reaction holes and the pile holes which are alternately connected in the direction of the road length of the dam crest highway, and the reaction ditch is 1m-2m away from the anti-seepage wall;

S130, a thin-walled wellbore 621 is installed in the pile hole. The thin-walled wellbore 621 is made of engineering plastics. The thin-walled wellbore 621 prevents the pile hole from collapsing and keeps the shape of the reaction hole as much as possible.

Preferably, in order to reserve a space for reaction and blocking on the front side of the reaction hole, the reaction hole should be placed eccentrically between two adjacent pile holes, so that the front side hole wall of the reaction hole is located on the front side of the pile hole Between the hole wall and the central axis, in particular, the most forward position of the reaction hole can be selected to be reserved at the frontmost point of the pile hole and one half of the line connecting the axis, so as to be on the front side groove wall of the reaction groove. A rearward protrusion is surrounded by two adjacent pile holes and the reaction holes between them.

S200, the reaction ball 630 is positioned on the water-facing side in the reaction hole, and the temporary pile 622 is installed in the center of the pile hole.

Wherein, according to the leak-prone position in the reaction hole, if there is only one leak-prone position in a reaction hole, only one reaction ball 630 is set at the leak-prone position; if there are multiple positions in a reaction hole, then One reaction ball 630 is provided at each position. However, the above setting method is a discrete positioning method, which requires higher pre-construction preparation work and is more difficult to construct. To this end, the following positioning methods of the reaction ball 630 are proposed:

A number of reaction balls 630 are put into an elastic sleeve 640 to form a reaction chain. The elastic sleeve 640 can be selected from engineering plastics, rubber, metal materials with a wall thickness of 2-5 mm, etc. The elastic sleeve 640 is reserved with each reaction ball. The reaction ports on the 630 correspond to the corresponding matching ports one by one, and a spring retaining ring 650 located between two adjacent reaction balls 630 is sleeved on the outer circumference of the elastic sleeve 640, so that each reaction ball 630 will not move up and down, And the reaction balls 630 are positioned in the reaction holes at equal intervals.

More preferably, there are three groups of reaction chains and are distributed in an isosceles triangle in the reaction hole, one of which is located at the central position of the front side of the reaction hole and is defined as the front reaction chain 611, and the other two are symmetrically distributed in the rear of the reaction hole. The left and right sides are defined as the post-reaction chain 612 . Among them, the front reaction chain 611 is used to sense the leakage in front of the reaction hole, and the rear reaction chain 612 is used to sense the leakage that has penetrated into the reaction pile, so as to construct two sensing curtains and improve the accuracy of leakage detection.

Wherein, the reaction ball 630 of the pre-reaction chain 611 includes:

Spherical shell, the spherical shell 631 is a thin-walled shell made of engineering plastics, and a reaction port is opened on the front side of the spherical shell 631 .

Pressure trigger mechanism, the pressure trigger mechanism is cylindrical and extends forward and backward at the diameter position of the spherical shell 631. The pressure trigger mechanism includes:

The blasting unit 632, the blasting unit 632 is cylindrical and is blocked on the reaction port, the blasting unit 632 is also provided with a guide through hole extending back and forth, and the rear end of the blasting unit 632 is provided with a pressure-triggered fuze;

Triggering unit 603, the triggering unit 603 is a mechanical pressure trigger mechanism for delayed unlocking, and the mechanical pressure trigger mechanism for delayed unlocking includes a contact rod 633 that is movably plugged and connected in the guide through hole to realize the movable sealing insert in the reaction port, and the triggering unit 603 is a triggering mechanism. The front section of the rod 633 is provided with a striker 634 arranged behind the blasting unit 632 at intervals, the front end passes through the reaction port, and the rear end is provided with an armature segment, wherein the front edge of the striker 634 is provided with a striker facing the blasting unit 632. The striker can hit the pressure-triggered fuze to detonate the blasting unit 632; the armature segment is also provided with a disk-mounted ferromagnetic disk 635 and a guide post 636 coaxially fixed behind it. There is an electromagnetic coil 637 fixed on the spherical shell 631 and magnetically connected with the armature section. The electromagnetic coil 637 is electrically connected with a battery 638 fixed on the spherical shell 631; the armature section, the compression spring, the electromagnetic coil 637 and the battery 638 An electromagnet is formed by a sleeve 639 fixed on the rear side wall of the spherical shell 631, and a battery port for the battery 638 is opened on the rear side of the spherical shell 631, and the battery 638 is preferably a button battery.

The setting retarding adhesive is filled in the spherical shell 631 . In addition, as an alternative technical solution, a liquid water blocking material doped with a retarder can also be used to replace the retarder.

The reaction ball 630 of the post-reaction chain 612 is different from the pre-reaction chain 611 in that:

There are two pressure triggering mechanisms in the spherical shell 631 and are distributed in an angular shape with each other, one pressure triggering mechanism faces the intersection of the reaction hole and the pile hole, and the other pressure triggering mechanism faces the axis of the reaction hole;

The triggering unit 603 of the pressure triggering mechanism is fixed on the blasting unit 632, that is, the sleeve 639 is fixed on the outer circumference of the blasting unit 632, so as to be pushed back by the top pressure of the shock wave when detonating, so as to extrude the retarding adhesive from the reaction port to achieve The effect of pressure injection.

During the loading process of the front reaction chain 611 and the rear reaction chain 612, under the action of the battery 638, the electromagnetic coil 637 pulls the armature segment of the striker backward, so that the striker overcomes the elastic force of the compression spring and is locked in the reaction ball 630 .

Preferably, in order to improve the leakage blocking effect in the reaction pile, the outer diameter of the rear reaction chain 612 is smaller than the outer diameter of the front reaction chain 611, so as to facilitate loading more rear reaction chains 612 into the reaction holes.

Preferably, in order to facilitate the positioning of the pre-reaction chain 611 and the post-reaction chain 612 in the reaction well, the pre-reaction chain 611 and the post-reaction chain 612 are both preset in the reaction well by hanging, and the hanging structure is as shown in A hanger is erected at the opening of the reaction hole, so that the tops of the front reaction chain 611 and the rear reaction chain 612 are hooked and connected to the hanger through hooks.

The outer diameter of the temporary pile 622 is 1/3-1/5 of the diameter of the pile hole and is coaxially arranged in the pile hole. The temporary pile 622 includes a cylinder made of sulfur cement and a stainless steel material embedded and fixed in it. The upper end of the electric heating rod is exposed from the pile hole and is connected with a vibration sensor, and the vibration sensor is connected with an alarm device that alarms when the vibration amplitude or vibration frequency exceeds the threshold. The lower ends of the temporary piles 622 extend onto the concrete base 700 .

S300, filling grouting is performed into the reaction hole, and the grouting material is bionic self-healing cement mortar.

The biomimetic self-healing cement mortar includes cement mortar material and a hollow fiber compounded therein containing an adhesive, and the adhesive is slow-gelling water, polyurethane, acrylate and other materials.

The grouting pressure should be controlled between 0.05-0.02MPa or pressureless grouting should be used until the grouting overflows from the orifice of the reaction hole. In order to reduce the impact of the grouting process on the front reaction chain 611 and the rear reaction chain 612 , the false unlocking of the pressure trigger mechanism is avoided. Thus, the first pile body 613 is formed by grouting with bionic self-healing cement mortar, and the pre-reaction chain 611 and the post-reaction chain 612 are embedded in the first pile body 613 to form the reaction pile 610 .

S400, forming the rigid pile 620.

S410, mixing and stirring the bulk material and the polyurethane colloid particles, and the bulk material is crushed stone;

S420, filling the mixture of the bulk material and the polyurethane colloid particles between the temporary pile 622 and the thin-walled wellbore 621, and after the filling is completed, the mixture is vibrated and compacted for the first time at the orifice of the pile hole;

S430, energize the electric heating rod to remove the sulfur mortar around it, and then increase the temperature of the electric heating rod, so that the polyurethane colloid particles are melted to fill the pores between the crushed stones, and at the same time, a second vibration and compaction is performed;

S440, keep the temperature of the electric heating rod, and at the same time pour cement, ultra-fine cement or chemical grouting and other grouting materials into the pile hole by means of pressure pouring. The pores between them are closely fused with the polyurethane colloid in the thermal insulation state, so as to form the second pile body 623 of the rigid pile 620 .

S500, after the reaction piles 610 and the rigid piles 620 are cured for a period of time, they are alternately distributed in the direction of the road length of the dam crest road to form a self-reaction curtain 600 isolated between the upstream surface 110 and the downstream surface 120 of the dam body 100. The battery 638 in the 630 is depleted due to the power consumption, thereby releasing the restriction on the striker, so that the striker is pressed against the corresponding striker wall under the action of the compression spring.

Preferably, the distance between the tip of the striker in the front reaction chain 611 and the front side wall of the reaction pile 610 should be controlled between 10-25mm, and after the striker is unlocked, the distance from the initial position to the trigger position should be greater than The above distance, that is, greater than 25mm. In order to prevent the reaction ball 630 from being accidentally exploded, normal pressure sensing can be ensured.

During use, if there is leakage, limited by the rigid piles 620 on both sides, the leakage position will extend to the reaction pile 610, and then the detonating device will be triggered to seal the leakage; at the same time, the shock wave brought by the explosion will It is transmitted to the vibration sensor through the electric heating rod to realize the early warning of leakage, which is convenient for the relevant departments to give early warning and disposal.

Example 2:

The difference between this embodiment and Embodiment 1 is:

The above construction is carried out on the anti-seepage layer 200 of the dam foundation before the main part of the dam body 100 is constructed, and the construction position is located on the water-facing side of the anti-seepage curtain 400;

After the grouting material is solidified, the construction of the dam body 100 is carried out on the anti-seepage layer 200 of the dam foundation, and the pressure trigger mechanism is unlocked after the construction of the dam body 100 is completed.

The above only describes the preferred application examples of the present invention, but should not be construed as a limitation on the claims. The structure of the present invention may have other changes and is not limited to the above-mentioned structure. In a word, all changes made within the protection scope of the independent claims of the present invention are all within the protection scope of the invention.

Claims (8)

1. Ecological wetland dam seepage shutoff system based on passive self-checking technique includes:

the reaction pile comprises a first pile body formed by bionic self-healing cement mortar cast-in-place molding and a reaction ball embedded in the first pile body, the reaction ball is eccentrically arranged on the water-facing side of the first pile body, the reaction ball comprises a ball shell and a reaction port formed in the water-facing side of the ball shell, a pressure trigger mechanism opened when the external pressure of the reaction ball is smaller than a set value is installed on the reaction port, and the reaction ball is filled with a liquid retarding adhesive and/or a liquid water plugging material doped with a retarder.

2. The ecological wetland dam leakage plugging system based on the passive self-inspection technology as claimed in claim 1, wherein rigid piles are arranged in parallel between two adjacent reaction piles, and the rigid piles and the reaction piles are alternately distributed in the road length direction of the dam crest road to form a self-reaction curtain isolated between the upstream surface and the downstream surface of the dam body.

3. The ecological wetland dam leakage plugging system based on the passive self-inspection technology as claimed in claim 2, wherein the water facing side of the reaction pile is located between the water facing side and the back water side of the rigid pile, so that a guide groove is formed by the water facing sides of two adjacent rigid piles and the water facing side of the reaction pile between the two rigid piles.

4. The ecological wetland dam leakage plugging system based on the passive self-inspection technology according to claim 2, wherein the lower end of the rigid pile is not lower than the reaction pile, the rigid pile comprises a second pile body and an electric heating rod embedded therein, wherein,

the electric heating rod is a metal rod, the upper end of the electric heating rod is exposed out of the second pile body, the lower end of the electric heating rod is flush with the lower end of the second pile body, the exposed part of the electric heating rod is connected with a vibration sensor, and the vibration sensor is connected with an alarm device which gives an alarm when the vibration amplitude or the vibration frequency exceeds a threshold value;

the second pile body comprises a discrete material, a grouting material and a polyurethane material, wherein the polyurethane material is mixed in the discrete material and is driven together, heated to a fluid state in the grouting material pouring process, and cooled to a solid state after the grouting material pouring is completed.

5. The ecological wetland dam leakage plugging system based on the passive self-inspection technology as claimed in any one of claims 1 to 4, wherein the pressure trigger mechanism comprises a trigger unit and a blasting unit, the trigger unit is an electronically triggered pressure sensor and/or a delayed unlocking mechanical pressure trigger mechanism, and a fuse of the blasting unit is connected with the trigger unit.

6. The ecological wetland dam leakage plugging system based on the passive self-inspection technology as claimed in claim 5, wherein the mechanical pressure trigger mechanism for delaying unlocking comprises a movable contact rod which is sealed and inserted in the reaction port, the front end of the contact rod is positioned in the reaction port or penetrates out of the reaction port, the rear end of the contact rod is provided with an armature section, the rear part of the armature section is connected with a pressure spring in an abutting manner, the armature section is sleeved with an electromagnetic coil which is fixed on the spherical shell and is magnetically connected with the armature section, and the electromagnetic coil is electrically connected with a storage battery fixed on the spherical shell.

7. The construction method of the ecological wetland dam leakage plugging system based on the passive self-inspection technology specially used for the ecological wetland dam of claim 1 comprises the following steps:

drilling holes in the clay core wall, wherein the drilled holes are distributed along the road length of a dam crest highway, and the drilled holes are positioned on the water facing side of the impervious wall;

positioning a reaction ball at the water facing side in the drill hole, wherein the reaction ball comprises a ball shell and a reaction port formed in the water facing side, a pressure trigger mechanism which is in a locking state and is opened when the external pressure of the reaction ball is smaller than a set value during unlocking is installed on the reaction port, and the reaction ball is filled with a liquid retarding adhesive and/or a liquid water plugging material doped with a retarder;

filling type grouting is carried out in the drill hole, and the grouting material is bionic self-healing cement mortar;

after the grouting material is cured, the pressure trigger mechanism is unlocked.

8. The construction method of the ecological wetland dam leakage plugging system based on the passive self-inspection technology, which is specially used for the system as claimed in claim 1, comprises the following steps:

drilling holes in the impervious barrier of the dam foundation, wherein the drilling holes are distributed along the road length of the dam crest highway, and the drilling holes are positioned on the water facing side of the impervious curtain;

positioning a reaction ball at the water facing side in the drill hole, wherein the reaction ball comprises a ball shell and a reaction port arranged at the water facing side, a pressure trigger mechanism which is in a locking state and is opened when the external pressure of the reaction ball is less than a set value during unlocking is arranged on the reaction port, and the reaction ball is filled with a liquid retarding adhesive and/or a liquid water plugging material doped with a retarder;

filling type grouting is carried out in the drill hole, and the grouting material is bionic self-healing cement mortar;

after the grouting material is cured, performing dam body construction on the dam foundation impervious layer;

and after the dam body is constructed, the pressure trigger mechanism is unlocked.

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