TW521111B - Anti-corrosion partition grouting device for corrugated pipe and construction method thereof - Google Patents

Abstract

This invention relating to an anti-corrosion partition grouting device for corrugated pipe and construction method thereof aims to solve locking difficulty caused by sand out gush, piece earth, and debris encountered inside of sleeves or anchor holes while constructing the permanent ground anchor in easily-tumbling sand layer with high groundwater level, mainly including an insulation sealed cone with a central hole, a partition device with central and bias holes, corrugated pipes, cone-shaped covers, water pipes, grouting pipes, and a set of tendons. A firm and permanent ground anchor is constructed with insulation effect, comprising the steps of: (1) inserting a set of well-assembled tendons into the corrugated pipe; (2) drilling anchor holes via sleeves; (3) placing the set of tendons and the corrugated pipe down into the sleeve of the anchor hole and flushing outwardly from the bottom of the corrugated pipe through the water pipes; (4) grouting cement paste through the water pipe until it flows out of the anchor hole to seal the water pipe after the set of tendons and the corrugated pipe are placed all the way down to the bottom of the anchor hole, and then sealing the top opening of the corrugated pipe with the cone-shaped cover; (5) pulling the sleeves out and simultaneously grouting cement paste continuously until the sleeves are pulled out totally; (6) grouting resin paste into the corrugated pipe through grouting pipes.

Description

521111 V. Description of the invention α) The present invention is a wave tube anti-corrosion isolation grouting device and construction method, which mainly solves the problem that the casing or tin hole is often caused during the construction process of the sand layer which is permanently wrong in the groundwater level and easy to collapse. Sand gushing, debris, gravel, etc. cause difficulty in entering the key; it is mainly an insulated closed cone with a center hole, a spacer with a center hole and an eccentric hole, a wave tube, a tapered cover, a water pipe, and an irrigation pipe And steel key sets, etc. By placing the completed steel key sets in the corrugated tube; drilling a tin hole with a casing; lowering the steel key sets and the corrugated tube into the casing of the anchor hole, and through the water pipe in the The bottom of the wave tube is flushed outwards; after the steel key group and the wave tube are completely lowered to the bottom of the tin hole, the cement slurry is poured through the water pipe until it overflows the anchor hole, then the water pipe is closed, and the upper end of the wave pipe is closed with a tapered cap. ; While pulling out the casing while continuing to inject the cement slurry until the casing is completely pulled out; the construction steps such as pouring the resin slurry into the wave tube with the grouting tube, complete the permanent anchor with a strong isolation effect. Chinese and foreign scholars and experts have unanimously affirmed that the anchor is the best state for slope stability and anti-floating, and that the anchor anchor is an extremely important part that cannot be denied. According to the FIP International Prestress Association, 1988 published 35 major ground anchor corrosion disasters, of which the corroded anchor section accounted for 5%, the free section corroded accounted for 50%, and the external end anchor corroded accounted for 45%. In addition, Chinese and foreign scholars and experts have concluded that cement slurry cannot be regarded as a permanent ground anchor anti-corrosion protection layer. FIP i 9 88 and BSI 1 989 stipulate that resin slurry should be poured into the PE wave tube at the anchor end, cement slurry should be filled outside the PE wave tube, and cement slurry should be poured into the protective tube, and the outer anchor should be covered with concrete after being coated with anti-corrosion oil. According to the above provisions, the inventors and others have continued to improve the research and design of ground anchors for many years, proving a quick, economical and simple construction

Page 5 521111 V. Description of the invention (2) The construction method can indeed meet the above requirements. The construction method is to use wave = coated steel key group, and the two ends are plugged with closed insulation cones. > Prevent water / nylon from flowing into the wave tube to invade the steel key group; after the completion of I seed hole / huo water / nylon outside the wave tube, remove the insulating cone on the top of the wave tube and pour the moon into the wave tube. The purpose slurry is 0 μ 丄. This is a construction method. The anchor hole is filled with cement slurry and has opposite holding power after solidification. The inner tube is filled with resin slurry and can be isolated from external moisture. Effectively protect the steel key set. _ In general, anchoring projects often encounter sand layers (SM) with a relatively low groundwater level and easy to identify holes. When drilling anchor holes with casing 1, there will be groundwater inflow into casing 1 as shown in the first figure. Entrained with a large amount of sediment, the depth of the anchor hole inside and outside the suite 1 is not the preset depth. The insufficient depth does not allow the keyholes to be entered under the steel key set, which leads to insufficient depth of the tin hole or construction loss. Problems such as groundwater and sand gushing encountered during casing drilling will eventually fail. Therefore, in order to effectively solve the above problems, the present inventors have developed an = when the holes are entered under the steel key set protected by the isolated wave tube, the water is continuously flushed with water & toward the bottom of the hole outside the good tube In order to flush out the deposited sediment, when the wave tube and the steel key, Fan Fan, reach the bottom of the hole, the water pipe acts as a grouting pipe for grouting, so that the water / Ni liquid fills the bottom of the anchor hole quickly and prevents the continuous invasion of groundwater "4 dagger outside" in the wave tube is filled with resin slurry to protect the steel key group from moisture and damage. After a long time of design and experiments, this good tube anti-corrosion isolation grouting device and construction method have been developed. & With a more specific embodiment of the present invention, and in conjunction with the drawings, the device, working method, characteristics and effects of the present invention are described in detail as follows ...

521111 V. Description of the invention (3) The construction steps of the present invention are shown in the following order: As shown in the second figure, the free end of the ground anchor includes a plurality of steel wires 21 covered with PE pipes 20, and It is coated with anti-corrosion butter. The lower end of the PE pipe 20 is wrapped with adhesive tape 2 to prevent butter from leaking out. Then, a number of spacers 23 with a central hole and an eccentric hole are provided at the anchor end to connect the steel strand 21 to form a steel key group 2. A larger grouting pipe 5 is provided at the center hole of the spacer 23, and a smaller water passing pipe 6 is provided at the eccentric hole of the spacer 23; thereafter, the entire steel key set 2 is set inside the PE wave pipe 3, The lower end of the PE wave tube 3 is provided with a hollow insulating cone 4, and the insulating cone 4 is fastened and fixed to the lower end of the pe wave tube 3 by using iron wires or other ties, tape 40 and the like. Among them, the hollow insulating cone 4 has a through-hole 41 through which the water pipe 6 can pass and is fixed by two inner and outer nut a. As shown in the third figure, the steel key set 2 and the wave tube 3 are lowered into the casing 1, and the water 14 is flushed to the bottom of the wave tube 3 through the water pipe 6 (as shown by the arrow Ψ). It is washed out by sand (as shown by arrow S). Down to the golden level: FI IV, * As shown in the fifth figure, when the steel key group 2 and the wave tube 3 can be completely lowered to the bottom of Jiangtian hole or Chu Fanwang injection cement (such as the depth of the axe ^ 疋, then The water pipe 6 is changed into an irrigation cone seal (7 == nothing) to the outside of the anchor hole, that is, the water pipe 6 is closed, and the cement slurry is filled to fill the upper part, and the pipe 1 is pulled out while holding the reading tube. 1 Completely pull out the gap in the water hole until the sleeve is filled with the hole between the anchor hole and the wave tube 3 as shown in the sixth figure. Fill the resin slurry (such as removing the tapered cover 7 and filling the self-grouting tube 5 to the wave tube 5 as shown in the hoe R), so that the steel key group 2 is covered with the resin slurry to complete the steel key group 2 Type the hole and isolate the grouting construction.

521111 V. Description of the invention (4) After the resin is solidified during the curing period, the steel strand 2 can be conducted on the ground surface to conduct a conductivity test 'to confirm that the wave tube 3 is non-conductive and insulative inside and outside, and prove that no water has penetrated into the wave tube. 3 to ensure the permanent effectiveness of the steel key set 2; finally, the installation, pre-tensioning, fine adjustment, lock-up, etc. of the pressure-bearing sheet, anchor head gripper, etc. outside the ground are completed and a solid and isolated groundwater is completed The effect of permanent tin. In the above construction steps, the assembled steel key set 2 is mainly composed of a plurality of steel hinge wires 21. At its free end, the steel hinge wire 21 is covered with a PE pipe 20 and coated with rust-proof butter; The fixed end portion of the steel hinge 2 丨 is connected to the steel hinges 21 by several spacers 2 3 to form a steel key group 2. The spacer 2 3 is provided with a grouting tube 5 at the center hole and the eccentric hole. And a water pipe 6, and then a PE wave tube 3 is coated on the outside of the entire steel key group 2, the wave tube 3 needs to be 30cm ~ 50cm longer than the steel key group 2, and a hollow insulating cone 4 is set below the wave tube 3. In addition, the insulation cone 4 is fixed at the lower end of the wave tube 3 by using iron wires or other ties, such as a tie, adhesive tape, and the like, and the water pipe 6 is communicated to the outside of the insulation cone 4 at the lower end of the wave tube 3. Among them, the resin slurry filled in the wave tube 3 may have other additives, such as non-aqueous fiber & dimension, particles, and the like. The present invention is characterized in that the lower end of the wave tube 3 is closed with an insulating cone 4 and then the water passing pipe 6 protruding outside the wave tube 3 is used for flushing and entering the hole to ensure that the steel key group 2 can be smoothly lowered to a predetermined depth. Later and at the same time grouting to fill the iron holes. Another feature of the present invention is that the casing 1 is filled with cement slurry, and the wave tube 3 is filled with resin slurry, so that both the water-saturated cement slurry and groundwater cannot penetrate the wave tube 3 and cause erosion to the steel key group 2.

521111 V. Description of the invention (5) Another feature of the present invention is to grout the bottom of the anchor hole with the water pipe 6 first, and then grout the bushing 1 while pulling up to make the cement slurry fill the anchor hole without additional installation. Ventilation tube. Another feature of the present invention is that the cement slurry and the resin slurry are separately poured, and because the components of the resin slurry are mixed by the AB agent, it must be cleaned with a solvent immediately after the grouting, and the cost of cleaning and materials is not low. Therefore, the present invention can focus on resin grouting once the cement grouting is completed in a certain number of ground anchors, which can save considerable costs. Based on the above, it can be known that the device and construction method of the present invention can effectively control the smooth construction of ground anchors, and exert anti-corrosion functions for permanent ground anchors. The materials are economical and easy to construct, and they have industrial use value. Application 0

521111 The diagram is a simple illustration. The first diagram is a schematic diagram of a borehole encountering a collapsed formation with a casing; the second diagram is a schematic diagram of the completion of the assembly of the steel key group of the present invention; the third diagram is a water pipe to the wave Schematic diagram of flushing outside the pipe; Figure 4 is a schematic diagram of grouting outside the wave tube with a water pipe according to the present invention; Figure 5 is a schematic diagram of the grouting completion of the present invention; Figure 6 is a resin pouring from the grouting tube into the wave tube according to the present invention Schematic diagram of the pulp. Description of drawing number: 1 bushing 2 steel key set 20 PE pipe 2 1 steel hinge 22 tape 23 spacer 3 wave pipe 4 wave pipe 40 fastening piece 41 through hole 42 nut 5 grouting pipe 6 water pipe 7 conical seal Cover SM sand layer W flush line

Page 10 521111 Schematic description S Sand soil flow line C Cement grout line R resin grout line

1BHII

Claims (1)

521111 VI. Patent application: The wave tube: Fang Li Guanzhong Construction Method 'The method steps are as follows: (1) Complete the steel key and the assembly of the steel key and place the steel key group into the wave-shaped protective tube. An insulating cone is set at the end; one (2) drilling the anchor hole with the casing to the ground; (3) driving the steel key group and the wave-shaped protective tube into the sleeve of the anchor hole, and exiting; Sand main punch (4) When the steel key set and the wave-shaped camp-now? ^ After the delivery, the water from the water pipe will be flushed immediately; it will become perfusion water: outside the anchor hole, the top of the corrugated tube will be closed with a conical seal (5) —Pull out the casing while filling the gap; KM added (6) Remove the conical cover from the anchor hole, and pour the tree from the grouting tube to make the steel key group filled with resin; paste in the wave-shaped protective tube to complete the keyhole of the steel key group. After the solidification of the toilet resin slurry during the health period, that is, ^ ^ work, waiting for the cement slurry and testing; confirm and prove that there is no water ^, the permanent effectiveness of the conductive bond group on the steel strand ΓΪΪ; two ... well-shaped protective tube,嚷 Baogang: Qi and other Anshang ya pull: ::: = = bu; line, ㈣ grip 2 away, the effect of the water is permanently wrong.疋 Specialized workers have completed a kind of anti-corrosion isolation grouting with a wave tube, which is composed of several steel hinge lines. The composition of the steel key group is: 'within it is coated with anti-rust oil; # 由 若; ^ ^ End is covered with PE, 姹 end is fixed to make a steel key group, the steel key ': an anchor steel ring set at the center of the steel hinge line, a grout tube is set to $ 12, page 521111 VI. Apply for a patent Inside the edge of the cone, and a water pipe protruding out of the insulating cone, the upper and lower nuts cooperate with the water seal ring to fix the water pipe and the insulating cone, and truly prevent the groundwater or cement slurry from penetrating into the wave-shaped protective tube to protect the steel key group. Invaded by moisture; then, the entire steel key group is covered with a wave-shaped protective tube made of plastic. The upper and lower ends of the wave-shaped protective tube are each equipped with a plastic integrated hollow cone cover and insulation cone. In addition, a fastening device composed of iron wires or other ties, tapes and the like is used to fix the insulating cone at the lower end of the wave-shaped protective tube. 3. According to the wave tube anti-corrosion isolation and grouting device described in the scope of the patent application, the hollow insulation cone at the lower end of the wave tube has a through hole for the water pipe to pass through and is fixed by two internal and external nuts. Page 13