CN216108479U - Foundation pit support anchor cable seepage double-liquid sealing grouting arrangement structure - Google Patents
Foundation pit support anchor cable seepage double-liquid sealing grouting arrangement structure Download PDFInfo
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- CN216108479U CN216108479U CN202121367536.9U CN202121367536U CN216108479U CN 216108479 U CN216108479 U CN 216108479U CN 202121367536 U CN202121367536 U CN 202121367536U CN 216108479 U CN216108479 U CN 216108479U
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Abstract
The utility model relates to the technical field of anchor cable leakage, and discloses a double-liquid closed grouting arrangement structure for foundation pit support anchor cable leakage, which comprises a grouting drill hole and a grouting pipe, wherein the edge of the upper end of a waist beam is connected with a support pile to form an upper connection part in linear arrangement; the outer end of the grouting drill hole is exposed at the upper joint, and the inner end of the grouting drill hole sequentially penetrates through the support pile and the soil body and extends into the anchor cable hole; a grouting pipe is inserted into the grouting drill hole, the inner end of the grouting pipe penetrates through the inner end of the grouting drill hole and extends into the anchor cable hole, and the outer end of the grouting pipe is exposed outside the grouting drill hole to form an exposed section for connecting two different external grouting pipelines; and drilling a grouting drill hole at the upper intersection of the waist beam and the support pile along the angle direction of the anchor cable, putting a grouting pipe into the grouting drill hole, and pouring double-liquid mixed slurry into the grouting pipe to perform water stop and plugging on the deep layer of the anchor cable hole, so that the quick, deep and closed plugging effect can be achieved, the problem of water leakage of the anchor cable is effectively solved, and good social and economic benefits are obtained.
Description
Technical Field
The utility model relates to the technical field of anchor cable leakage, in particular to a double-liquid closed grouting arrangement structure for foundation pit support anchor cable leakage.
Background
When pile anchor support is adopted in deep foundation pit excavation, the phenomenon of water leakage of different degrees at the anchor head position often occurs after the anchor cable is tensioned and locked. The long-time anchor cable leakage water can cause the reduction of underground water level around the foundation pit in different degrees, and the anchor cable leakage water is continuously increased, which can cause the increase or standard exceeding of the settlement of peripheral pipelines and buildings (structures).
In the foundation pit, a plurality of longitudinally arranged supporting piles are utilized to surround and support in the soil body around the foundation pit, a transverse waist beam is connected to the plurality of supporting piles, the waist beam is connected with the plurality of supporting piles, and the plurality of supporting piles are integrally connected and supported. When the anchor cable is supported, the anchor cable penetrates through the waist beam and the supporting pile in sequence, the inner end of the anchor cable is anchored in a soil body to form an anchoring section, the outer end of the anchor cable is exposed outside the waist beam to form a connecting section, the connecting section is connected with an anchor head, the anchor cable is locked by the anchor head, and a base plate is arranged between the anchor head and the waist beam in a padding mode.
In order to eliminate the potential safety hazard caused by the leakage of the anchor cable to the foundation pit, a plurality of grouting holes are drilled in a base plate of an anchor head, and grouting liquid is injected by a high-pressure grouting machine to stop the leakage. In the actual plugging construction, when the anchor cable leakage water is saturated or slightly leaked, the anchor head is subjected to chemical grouting treatment, so that a certain effect is achieved, and the leakage point can be quickly plugged; when the anchor cable has large leakage water, the chemical grouting treatment is adopted, the water leakage point of the anchor head can be blocked, but the leakage can be generated around the waist beam of the anchor cable, the effect of blocking leakage is difficult to achieve, and the leakage blocking effect is poor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a leakage double-liquid closed grouting arrangement structure for an anchor cable of a foundation pit support, and aims to solve the problem that in the prior art, the leakage stoppage effect of the anchor cable is poor.
The foundation pit supporting anchor cable seepage double-liquid closed grouting arrangement structure comprises a grouting drill hole and a grouting pipe, wherein the edge of the upper end of a waist beam is connected with a supporting pile to form an upper connection part in linear arrangement; the outer end of the grouting drill hole is exposed at the upper joint, and the inner end of the grouting drill hole sequentially penetrates through the support pile and the soil body and extends into the anchor cable hole;
the grouting drill hole is inserted with a grouting pipe, the inner end of the grouting pipe penetrates through the inner end of the grouting drill hole and extends into the anchor cable hole, and the outer end of the grouting pipe is exposed outside the grouting drill hole to form an exposed section for connecting two different grouting pipelines outside.
Furthermore, the central axis of the grouting drill hole and the central axis of the anchor cable hole are in the same longitudinal plane.
Furthermore, an included angle between the central axis of the grouting drill hole and the central axis of the anchor cable hole is 3-7 degrees.
Furthermore, an included angle between the central axis of the grouting drill hole and the central axis of the anchor cable hole is 5 degrees.
Further, the inner end of the grouting pipe is arranged in a closed mode.
Further, along the inserting direction of the grouting pipe, the grouting pipe is provided with a spraying section arranged on the inner side of the support pile, a plurality of grouting holes are formed in the side wall of the spraying section, a waterproof cloth is wound outside the spraying section, and the grouting holes are sealed by the waterproof cloth; when the grouting pipe performs high-pressure grouting, the slurry breaks the water-stopping cloth blocked on the grouting hole by extrusion and is ejected out through the grouting hole.
Further, a plurality of the grouting holes are arranged around the periphery of the grouting pipe at intervals.
Further, a plurality of the grouting holes are spirally wound on the grouting pipe.
Further, go up handing-over department and be provided with the reinforcement seat that cement was pour and is formed, the periphery of the lower part of reinforcing seat cladding exposing the section, and fixed connection is at the lateral wall of a fender pile and the top of waist rail respectively.
Furthermore, the section that exposes of slip casting pipe is connected with the screw thread tube head, through the screw thread tube head is connected with outside two different slip casting pipelines.
Compared with the prior art, the double-liquid closed grouting arrangement structure for leakage of the foundation pit supporting anchor cable provided by the utility model has the advantages that the grouting drill hole is drilled along the angle direction of the anchor cable at the upper joint of the waist beam and the supporting pile, the grouting pipe is put in, in actual construction, double-liquid mixed slurry is poured into the grouting pipe by connecting two different grouting channels at the exposed section, and the deep water-stopping plugging of the anchor cable hole is realized, so that the quick, deep and closed plugging effect can be achieved, the problem of leakage of the anchor cable is effectively solved, and good social and economic benefits are obtained.
Drawings
FIG. 1 is a construction schematic diagram of a foundation pit support anchor cable seepage double-liquid closed grouting arrangement structure provided by the utility model;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a schematic internal view of a tee fitting provided by the present invention;
fig. 4 is a schematic front view of the support frame of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-4, preferred embodiments of the present invention are shown.
The anchor cable 103 has an anchoring section penetrating the soil body 100, a penetrating section sequentially penetrating the wale 102 and the support pile 101, and a connecting section exposed outside the wale 102, the connecting section is connected with an anchor head, and the upper end edge of the wale 102 is connected with the support pile 101 to form an upper intersection arranged in a linear shape.
A foundation pit support anchor cable seepage double-liquid closed grouting arrangement structure comprises grouting drill holes and a grouting pipe 301, wherein the grouting drill holes are arranged in a downward inclined mode, the outer ends of the drill holes are exposed at the upper intersection of a waist beam 102 and a support pile 101, and the inner ends of the grouting drill holes sequentially penetrate through the support pile 101 and a soil body 100 and extend into anchor cable holes.
And a grouting pipe 301 is inserted into the grouting drill hole, the inner end of the grouting pipe 301 penetrates through the inner end of the grouting drill hole and extends into the anchor cable hole, the outer end of the grouting pipe 301 is exposed outside the grouting drill hole to form an exposed section, and the exposed section is used for connecting two different grouting pipelines outside.
According to the foundation pit supporting anchor cable leakage double-liquid closed grouting arrangement structure, the grouting drill hole is drilled along the angle direction of the anchor cable 103 at the upper joint of the waist beam 102 and the supporting pile 101, the grouting pipe 301 is lowered, in actual construction, double-liquid mixed slurry is poured into the grouting pipe by connecting two different grouting channels at the exposed section, and the deep water-stopping and plugging of the anchor cable hole can be achieved, so that the quick, deep and closed leakage-stopping effect can be achieved, the problem of leakage of the anchor cable 103 is effectively solved, and good social and economic benefits are obtained.
The seepage double-liquid closed grouting arrangement structure for the anchor cable of the foundation pit support has the following technical effects:
1) the plugging effect is good, the flow channel of the leakage water is deeply plugged, the problem of the leakage water is solved from the source, and the plugging effect is good;
2) the grouting operation is convenient;
3) the method is green and environment-friendly and has no pollution;
4) the comprehensive cost is low, the used materials are simple, the use amount is small, and the operation uses conventional machines; the grouting speed is high, only two workers are needed to operate during operation, and the overall comprehensive cost is low.
In this embodiment, the inner end of the grouting pipe 301 is arranged in a closed manner, so that in actual construction, a cover is used for sealing the bottom of the grouting pipe 301, thereby ensuring that a closed space is formed during high-pressure grouting, increasing grouting pressure, and enabling grout to form high-pressure injection and permeation.
Along the insertion direction of the grouting pipe 301, the grouting pipe 301 is provided with a spraying section arranged on the inner side of the support pile 101, a plurality of grouting holes are formed in the side wall of the spraying section, and a waterproof cloth is wound outside the spraying section and externally seals the grouting holes; after the slurry entering the two different grouting pipelines is mixed, the slurry enters the grouting pipe 301, breaks the water stop cloth plugged on the grouting holes, and is ejected out through the grouting holes until the grouting pressure of the double-liquid grouting pump 200 reaches a set value, and the double-liquid grouting pump 200 stops working.
The plurality of grouting holes are circumferentially arranged at intervals along the circumference of the grouting pipe 301, and further, may be spirally arranged on the grouting pipe 301.
In this embodiment, the two-fluid grouting pump 200 is used to inject two-fluid mixed slurry of water glass and cement slurry into the grouting pipe 301, and the cement is coagulated by the water glass and the cement slurry.
In order to facilitate the connection of the exposed section with two different external grouting channels, the exposed section of the grouting pipe 301 is connected with a three-way pipe joint, the three-way pipe joint is provided with a discharge head 303 and two feed heads 302, and the two feed heads 302 are respectively connected with the discharge head 303; connecting a discharge head 303 of a three-way pipe joint with an exposed section of a grouting pipe 301, wherein two feed heads 302 are respectively communicated with a cement slurry pipeline and a water glass pipeline which are respectively connected with a double-liquid grouting pump 200;
the double-liquid grouting pump 200 injects cement slurry through a cement slurry pipeline and injects water glass through a water glass pipeline, the cement slurry and the water glass are mixed in the discharging head 303 and then enter the grouting pipe 301, the water stop cloth blocked on the grouting hole is squeezed and broken, the water stop cloth is sprayed out through the grouting hole, and the double-liquid grouting pump 200 stops working until the grouting pressure of the double-liquid grouting pump 200 reaches a set value.
The central axis of the grouting drill hole and the central axis of the anchor cable hole are located on the same longitudinal plane, and the included angle between the central axis of the grouting drill hole and the central axis of the anchor cable hole is 3-7 degrees, so that the grouting drill hole and the anchor cable 103 are ensured to be close to each other in a crossed mode.
Specifically, the included angle between the central axis of the grouting drill hole and the central axis of the anchor cable hole is 5 degrees.
After the grouting pipe 301 is inserted into the grouting drill hole, cement is used to form a reinforcing seat at the upper joint, the reinforcing seat covers the periphery of the lower part of the exposed section, and the reinforcing seat is fixedly connected to the side wall of the support pile 101 and the top of the wale 102 respectively. When preventing subsequent high-pressure biliquid slip casting, slip casting pipe 301 shifts or is washed out, influences the slip casting effect.
The tee joint comprises a feeding pipe 304, feeding heads 302 are formed at two ends of the feeding pipe 304, the middle part of the feeding pipe 304 is bulged to form a bulged part, a mixing cavity is formed in the bulged part, and a discharging head 303 is formed at the bottom of the bulged part; in the step 5), the water glass and the cement slurry entering from the two feeding heads 302 are gathered in the mixing cavity to be mixed, and then enter the grouting pipe 301 from the discharging head 303.
After the cement slurry and the water glass are respectively flushed by the two feeding heads 302 at high pressure, the cement slurry and the water glass can be fully mixed in the mixing cavity and then enter the grouting pipe 301 through the discharging head 303 at the bottom. The cement slurry is P042.5 common silicate, and the water-cement ratio is 0.5; the concentration Be' of the water glass is 20-35, and the modulus M is 2.4-3.2; the volume ratio of the cement paste to the water glass is 3: 2.
Injecting cement slurry and water glass in a two-liquid mode according to a certain proportion, wherein a cement hydrolysate CaOH2With water glass Na 2O. nSiO2After mixing, the chemical reaction is rapidly carried out to form cement paste Cao nSiO2·mH2And O, the colloid blocks the cracks and bleeding passages of the soil body 100 around the anchor cable 103, and cuts off the flow path of water flow, thereby achieving the purpose of deep sealing and water stopping. The cement glue of the double-liquid grouting has the setting time of only about 15 seconds, has high setting speed and high strength, and can realize quick leakage stoppage.
The mixing chamber comprises a middle portion aligned with the interior of the two feed heads 302, an upwardly arched portion 305 arranged upwardly arched above the middle portion, and a downwardly concave lower concave portion 306 arranged downwardly concave below the middle portion, the volume of the lower concave portion 306 being greater than the volume of the arched portion 305. Thus, after the cement slurry filled under high pressure is flushed with the water glass, the mixed mixture quickly enters the concave part 306 and is filled into the discharge head 303 due to the small volume of the arch part 305.
The inner end of the feed head 302 has a communication opening communicating with the mixing chamber, and the bottom of the communication opening is raised with a step baffle 307. Thus, the cement paste and the water glass, which are injected at high pressure under the restriction of the step dam 307, are first mixed at the arch part 305 by being pushed up at high speed, and then are mixed for the second time while being pushed down into the concave part 306 after being mixed, so that the cement paste and the water glass can be mixed more uniformly.
In actual construction, in order to realize the firm fixing of tee pipe joint, connect the support frame on tee pipe joint, the support frame includes bracing piece 402 and diagonal brace 401, the upper end and the inlet pipe 304 swing joint of bracing piece 402, the lower extreme butt of bracing piece 402 is at the top of waist rail 102, the upper end of diagonal brace 401 articulates at the middle part of bracing piece 402, the lower extreme butt of diagonal brace 401 is in last handing-over department. Like this, utilize the support frame to the support of tee bend coupling, at the in-process of slip casting, because all be high-pressure slip casting, then keep firm being connected between the section that exposes of tee bend coupling and slip casting pipe 301, and keep tee bend coupling can not drop or phenomenon such as shift because of high-pressure impact.
The inclined support rods 401 and the feeding pipes 304 are vertically arranged, so that the connection between the discharging heads 303 and the exposed sections of the tee pipe joints can be better kept, the feeding pipes 304 are kept in a horizontal state, and the cement paste and the water glass flushed in by the two feeding heads 302 can be guaranteed to be opposite to each other and mixed.
The top of the wale 102 is provided with a positioning groove 404, the positioning groove 404 is provided with a positioning side wall 405 arranged towards the support pile 101, the positioning side wall 405 is obliquely arranged towards the support pile 101 along the top-down direction, and the lower end of the support rod 402 is abutted against the positioning side wall 405; the upper end of the inclined strut 401 is hinged with a sliding head 403 which slides along the strut bar 402, and the sliding head 403 is movably sleeved on the strut bar 402.
The lower extreme of bracing piece 402 can be better supported to the location lateral wall 405 of constant head tank 404, avoids its position phenomenon that runs to appear, secondly, when the lower extreme of bracing piece 402 runs the position up along location lateral wall 405, at this moment, the upper end of diagonal brace 401 then moves down along bracing piece 402, back pull back bracing piece 402 for the location position of constant head tank 404 is got back to bracing piece 402, realizes the automatic function of adjusting the position of stabilizing automatically.
The working principle of the dual-fluid grouting pump 200 is mainly that the oil cylinder and the grouting cylinder have larger acting areas, so that the cylinder body can generate higher injection pressure only with small pressure. When the biliquid grouting pump 200 works, the crank of the biliquid grouting pump 200 rotates anticlockwise at an angular velocity omega, the piston moves rightwards, the volume of the cavity is increased suddenly, the pressure of liquid in the cavity is reduced, the suction valve is opened and the discharge valve is closed under the action of external pressure, and the conveyed liquid overcomes the resistance loss of a suction pipeline, the suction valve and the like and enters the cavity under the action of pressure difference.
When the crank rotates 180 deg., the piston moves leftwards, the liquid is squeezed, the pressure of the liquid in the cavity increases sharply, the suction valve is closed and the discharge valve is opened under the action of the pressure, and the liquid in the cavity is discharged to the discharge pipeline under the action of pressure difference. As the crank rotates continuously at the angular velocity ω, the dual fluid injection pump 200 continuously draws in and discharges fluid. The double-liquid grouting adopts two sets of suction and pumping pipelines, so that the water glass and the cement slurry can be respectively injected simultaneously, and are quickly mixed through a tee joint, thereby achieving the effect of plugging.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The double-liquid sealed grouting arrangement structure for the leakage of the anchor cable of the foundation pit support is characterized by comprising a grouting drill hole and a grouting pipe, wherein the edge of the upper end of a waist beam is connected with a support pile to form an upper connection part in linear arrangement; the outer end of the grouting drill hole is exposed at the upper joint, and the inner end of the grouting drill hole sequentially penetrates through the support pile and the soil body and extends into the anchor cable hole;
the grouting drill hole is inserted with a grouting pipe, the inner end of the grouting pipe penetrates through the inner end of the grouting drill hole and extends into the anchor cable hole, and the outer end of the grouting pipe is exposed outside the grouting drill hole to form an exposed section for connecting two different grouting pipelines outside.
2. The double-liquid sealed grouting arrangement structure for leakage of anchor cables in foundation pit support according to claim 1, wherein the central axis of the grouting bore hole and the central axis of the anchor cable hole are in the same longitudinal plane.
3. The foundation pit support anchor cable seepage biliquid closed grouting arrangement structure of claim 2, characterized in that the angle between the central axis of the grouting bore and the central axis of the anchor cable hole is between 3 ° and 7 °.
4. The foundation pit support anchor cable seepage biliquid closed grouting arrangement structure of claim 3, characterized in that the angle between the central axis of the grouting bore hole and the central axis of the anchor cable hole is 5 °.
5. The double-fluid sealed grouting arrangement structure for the leakage of anchor cables in foundation pit support as claimed in any one of claims 1 to 4, wherein the inner end of the grouting pipe is sealed.
6. The double-liquid sealed grouting arrangement structure for the leakage of anchor cables in foundation pit support as claimed in claim 5, wherein along the insertion direction of the grouting pipe, the grouting pipe is provided with a spraying section arranged on the inner side of the support pile, the side wall of the spraying section is provided with a plurality of grouting holes, the spraying section is wound with a water stop cloth, and the grouting holes are sealed by the water stop cloth; when the grouting pipe performs high-pressure grouting, the slurry breaks the water-stopping cloth blocked on the grouting hole by extrusion and is ejected out through the grouting hole.
7. The double-fluid-seal grouting arrangement structure for leakage of anchor cables in foundation pit support as claimed in claim 6, wherein a plurality of grouting holes are circumferentially arranged at intervals along the circumference of the grouting pipe.
8. The double-liquid closed grouting arrangement structure for leakage of anchor cables in foundation pit support as claimed in claim 7, wherein a plurality of grouting holes are spirally wound on the grouting pipe.
9. The double-liquid sealed grouting arrangement structure for the seepage of anchor cables in foundation pit support as claimed in any one of claims 1 to 4, wherein the upper junction is provided with a reinforcement seat formed by pouring cement, the reinforcement seat is coated on the periphery of the lower part of the exposed section and is fixedly connected to the side wall of the support pile and the top of the waist beam respectively.
10. The double-fluid closed grouting arrangement structure for foundation pit support anchor cable leakage according to any one of claims 1 to 4, wherein the exposed section of the grouting pipe is connected with a threaded pipe head through which two different grouting pipes are connected with the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121367536.9U CN216108479U (en) | 2021-06-18 | 2021-06-18 | Foundation pit support anchor cable seepage double-liquid sealing grouting arrangement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121367536.9U CN216108479U (en) | 2021-06-18 | 2021-06-18 | Foundation pit support anchor cable seepage double-liquid sealing grouting arrangement structure |
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| Publication Number | Publication Date |
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| CN216108479U true CN216108479U (en) | 2022-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121367536.9U Active CN216108479U (en) | 2021-06-18 | 2021-06-18 | Foundation pit support anchor cable seepage double-liquid sealing grouting arrangement structure |
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| CN (1) | CN216108479U (en) |
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2021
- 2021-06-18 CN CN202121367536.9U patent/CN216108479U/en active Active
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