Net hanging component for SMW construction method piles, SMW construction method pile enclosure structure and construction method

Abstract

The net hanging component comprises a center penetrating rod, a sleeve and a supporting rib, the center penetrating rod is sleeved with the sleeve, the supporting rib is located in the middle of the center penetrating rod and wound around the sleeve, and the two free ends of the supporting rib are located on the inclined upper portion and the inclined lower portion of the same side of the center penetrating rod respectively. And the lower free end is provided with an upward bending part. According to the enclosure structure, the hanging net component is installed on one side of a construction method pile, during construction, notches are formed in the construction method pile, the two ends of the hanging net component are arranged in the corresponding notches of the two adjacent construction method piles respectively and fixed through grouting, then the hanging net is connected to supporting ribs in a hanging mode, and finally concrete is sprayed to form the enclosure structure. The hanging net component is simple in structure and convenient to install, and the hanging net of the building envelope after construction is high in fixing reliability.

Description

Technical Field

[0001] The invention belongs to the field of construction engineering, and particularly relates to a PET fabric hanging net component for SMW construction method piles, an SMW construction method pile enclosure structure implemented by adopting the hanging net component, and a construction method thereof. Background Art

[0002] The general method of pile retaining structure foundation pit side wall hanging mesh spraying process adopts planting steel bars on the mixing pile as the mesh hanging support. This connection method has low reliability and the mesh is easy to fall off. If the implanted steel bars are welded to the H-steel, the subsequent withdrawal of the H-steel will easily cause damage to the hanging mesh structure. In addition, the water-stop curtain is easily penetrated during planting, causing subsequent water leakage. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a PET fabric hanging net component for SMW piles, an SMW pile enclosure structure implemented by using the hanging net component, and a construction method thereof, so as to solve the problems of low reliability of the existing hanging net method, easy falling off of the hanging net, and easy damage to the hanging net structure, which may cause subsequent water leakage.

[0004] In order to achieve the above technical effects, the technical solution adopted by the present invention is:

[0005] A PET fabric mesh hanging member for SMW piles is characterized in that it includes a through rod, a sleeve and a support rib, the sleeve is sleeved on the surface of the through rod, the support rib is located in the middle of the through rod, the support rib is wound on the sleeve, the two free ends of the support rib are respectively located obliquely above and below the same side of the through rod, and the lower free end of the support rib is provided with an upward bending portion.

[0006] Preferably, the sleeve is an open sleeve with a C-shaped cross section.

[0007] Preferably, a friction reducer is provided between the inner wall of the sleeve and the outer wall of the through rod.

[0008] Preferably, there are three sleeves, including two end sleeves and a middle sleeve. The middle sleeve is sleeved in the middle of the through rod, and the two end sleeves are correspondingly sleeved at both ends of the through rod. There is a distance between adjacent sleeves, and the support rib is located in the middle position of the middle sleeve.

[0009] Furthermore, the present invention also provides an SMW method pile enclosure structure, including a method pile, an H-shaped steel, a hanging net and a hanging net component; the H-shaped steel is inserted into the method pile, and the hanging net is hung on the side of the method pile close to the foundation pit through the hanging net component, characterized in that the hanging net component adopts the above-mentioned hanging net component.

[0010] Preferably, a horizontal groove is provided vertically at regular intervals on the cement mixing piles between the webs of two adjacent H-shaped steels.

[0011] Preferably, the mesh member except for the two free ends is disposed in the notch of the construction pile and is fixed by grouting in the notch, and the mesh member does not directly contact the H-shaped steel.

[0012] Preferably, the spacing between the hook grooves of the lower end curved portions of two upper and lower adjacent support ribs is adapted to the spacing between two transverse ribs of the hanging net.

[0013] Preferably, the hanging net is a PET hanging net, a transverse rib of the hanging net is hooked in the hook groove of the lower curved portion of the supporting rib, and another transverse rib above the transverse rib is hung on the upper free end of the supporting rib.

[0014] Furthermore, the present invention also provides a construction method of the pile retaining structure according to the above-mentioned SMW construction method, which is characterized by comprising the following steps:

[0015] Step 1: To construct SWM piles, first use a mixer to drill into the soil. After the mixing head sinks to the designed elevation, start the mortar pump to press the mixed cement slurry into the soil. Before the cement soil begins to set, insert the H-shaped steel. Before insertion, calibrate the position and set a guide device to ensure verticality.

[0016] Step 2: After the SWM piles reach the design strength, a horizontal notch is opened vertically at regular intervals on the cement mixing piles between the adjacent H-steel webs, and the notch length is ensured to be no less than the length of the mesh member.

[0017] Step 3: implant the mesh components into the slots one by one, and inject grout into the slots to fix the mesh components;

[0018] Step 4: Connect one side of the customized hanging net to the hanging net component first, and then fix the hanging net along the construction piles in sequence to cover the entire set area;

[0019] Step 5: First spray the first layer of concrete from top to bottom. The concrete coverage needs to completely include the PET mesh. After the surface of the first layer of concrete is initially solidified, spray the second layer of concrete. The second layer of concrete needs to ensure that the mesh structure is completely covered and no exposed structure should appear. After the sprayed concrete has finally set for a certain period of time, it should be cured.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] (1) The mesh member of the present invention is wound around the sleeve by using supporting ribs to form two free ends, thereby providing great convenience for the construction of the pile mesh. The mesh is easy to install and not easy to fall off.

[0022] (2) The enclosure structure of the present invention minimizes damage to the formed water-stop curtain by opening notches on the construction piles and implanting hanging net components, thereby preventing leakage. Even if the water-stop curtain partially leaks, the hanging net structure can still achieve a good water-stopping effect, forming an effective secondary protection.

[0023] (3) By using PET hanging mesh, it is corrosion-resistant and highly reliable;

[0024] (4) There is no direct contact between the steel mesh and the H-shaped steel, forming an isolation zone to prevent damage to the mesh spraying system when the H-shaped steel is pulled out, thereby ensuring the quality of the side wall external waterproofing.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is an elevation view of the mesh component of Example 1;

[0027] Figure 2 It is a plan view of the mesh hanging component of Example 1;

[0028] Figure 3a The side of the mesh component of Example 1 Figure 1 ;

[0029] Figure 3b The side of the mesh component of Example 1 Figure 2 ;

[0030] Figure 3c The third side view of the mesh hanging component of the first embodiment;

[0031] Figure 4 This is an elevation view of the enclosure structure of Example 2;

[0032] Figure 5 This is a plan view of the enclosure structure of Example 2;

[0033] Figure 6 It is a side view of the enclosure structure of Example 2;

[0034] Figure 7 for Figure 6 Magnified view of part A.

[0035] The numbers and corresponding names in the figure are:

[0036] 1. Netting component, 11. Through-core rod, 12. Sleeve,

[0037] 12a. End sleeve, 12b. Middle sleeve, 121. Opening,

[0038] 13. Support rib, 131. Free end, 132. Wrapping part,

[0039] 14. Friction reducer, 2. Construction pile, 3. H-beam,

[0040] 4. Hanging mesh, 41. Transverse ribs, 5. Notches. DETAILED DESCRIPTION

[0041] Example 1

[0042] A mesh component for SMW piles, such as Figure 1 、 2 As shown, the net hanging component 1 includes a through rod 11, a sleeve 12 and a support rib 13. The sleeve 12 is sleeved on the surface of the through rod 11, and a friction reducer 14 is provided between the inner wall of the sleeve 12 and the outer wall of the through rod 11. The support rib 13 is located in the upper middle part of the through rod 11, and the support rib 13 has two free ends 131 and a winding portion 132 connecting the two free ends 131. The winding portion 132 of the support rib 13 is tightly wound on the outer surface of the sleeve 12, and the two free ends 131 are respectively located obliquely above and obliquely below the same side of the through rod 11, forming an eight-shaped shape. The lower free end 131 of the support rib 13 is provided with an upward bending portion to form a hook-shaped structure for hooking the hanging net 4 to ensure the stability of the hanging net 4.

[0043] Preferably, the through rod 11 is made of metal material and its surface is treated with rust prevention to extend its service life. The sleeve 12 is made of PVC material, and its surface can have a certain degree of roughness, which can effectively prevent the support rib 13 from sliding on the sleeve 12 after being wound. The sleeve 12 adopts an open sleeve 12 with a C-shaped cross-section, and the width of its opening 121 is smaller than the diameter of the through rod 11, so that the sleeve 12 can be stuck on the through rod 11 without falling off; and the opening 121 of the sleeve also makes the sleeve have a certain degree of elasticity, which is more convenient when the sleeve is implanted in the groove opened on the construction pile 2 and when the through rod 11 is stuck in the sleeve. In addition, in order to facilitate installation and save materials and costs, the sleeve 12 adopts a three-section structure to be sleeved on the surface of the through rod 11, two of which are end sleeves 12a, which are correspondingly sleeved on the two ends of the through rod 11, and the third is a middle sleeve 12b, which is sleeved in the middle of the through rod 11. There is a distance between the three sleeves 12; and the three-section sleeve 12 design is also more conducive to ensuring the stability of the position of the support rib 13 and.

[0044] The support rib 13 is made of a metal wire material with good elasticity and is a spring-shaped structure, the middle of which is wound around the sleeve 12 for 1.5-3.5 turns. The shape of the upper free end 131 of the support rib 13 is not limited, that is, the upper free end 131 of the support rib 13 may not have a bent portion (such as Figure 3a As shown), an upward or downward bending portion may also be provided (as shown Figure 3b 、 3c As shown), the shape of the curved portion is not limited and may be arc-shaped, triangular-shaped, etc. In short, the upper free end 131 of the support rib 13 is configured to ensure that the transverse rib 41 of the hanging net 4 can be hung and that the transverse rib 41 will not move outwards without external force, and the curved portion of the lower free end 131 is the same.

[0045] Example 2

[0046] A SMW pile retaining structure, such as Figure 4-7 As shown, the retaining structure includes a construction pile 2, an H-shaped steel 3, a mesh 4 and a mesh component 1. The H-shaped steel 3 is inserted into the construction pile 2, and the flange of the H-shaped steel 3 is parallel to the side wall of the foundation pit. The mesh 4 is hung on the construction pile 2 close to the foundation pit through the mesh component 1. The mesh component 1 adopts the mesh component 1 of embodiment 1. Specifically, a horizontal groove 5 is opened vertically at regular intervals on the web of the cement mixing pile between the webs of two adjacent H-shaped steels 3; the mesh component 1, except for the two free ends 131, is embedded in the groove 5 of the construction pile 2 and is fixed by grouting in the groove 5, and the mesh component 1 does not directly contact the H-shaped steel 3.

[0047] Preferably, the mesh 4 is made of PET polyester material instead of the traditional wire mesh 4, which can effectively resist groundwater corrosion and effectively enhance the functionality of the second waterproofing. The PET mesh 4 is woven with a hexagonal grid, which effectively enhances the tensile strength and increases the strength of the enclosure structure. When the mesh component 1 is selected or manufactured, it is ensured that the distance from the lowest point of the hook groove of the lower end bend of the support rib 13 to the contact point after the upper free end 131 above it is hooked to the transverse rib 41 of the mesh 4 is an integer multiple of the mesh height of the PET mesh 4. The spacing between the hook grooves of the lower end bends of two adjacent support ribs 13 above and below is an integer multiple of the mesh height of the PET mesh 4, that is, it is ensured that one transverse rib 41 of the mesh 4 is hooked in the hook groove of the lower end bend of one support rib 13, and the other transverse rib 41 above the transverse rib 41 is hung on the lower free end 131 of the other support rib 13. This can reduce the tensile torque of the mesh 4 on the support rib 13, while also ensuring the overall strength and stability of the mesh 4.

[0048] Example 3

[0049] A construction method for the SMW pile retaining structure according to the second embodiment includes the following steps:

[0050] Step 1: Construct SWM piles 2. First, use a mixer to drill into the soil. After the mixing head sinks to the designed elevation, start the mortar pump and press the prepared cement slurry into the soil. Insert H-shaped steel 3 before the cement soil begins to set. Before insertion, calibrate the position and install a guide device to ensure verticality.

[0051] Step 2: After the SWM pile 2 reaches its designed strength, horizontal slots 5 are created vertically at regular intervals along the cement mixing pile between the webs of two adjacent H-beams 3, based on the required area and location of the PET mesh 4. These slots 5 are sized to completely fit within the mesh member 1, excluding its two free ends 131. Furthermore, the sleeves 12 are positioned to avoid the flanges of the H-beams 3, preventing damage to the mesh 4 structure when the H-beams 3 are later pulled out.

[0052] Step 3: Insert the mesh component 1 except the outward portion of the two free ends 131 into the notch 5, and adjust the position of the support rib 13 so that the support rib 13 is located at the center of the overlapping portion of the two mixing piles, and then inject grout into the notch 5 to fix the mesh component 1; at the same time, ensure that the mesh component 1 does not contact the H-shaped steel 3.

[0053] Step 4: First, attach one side of the custom mesh 4 to the support ribs 13 of the mesh member 1. Then, sequentially secure the remaining mesh 4 sections to the corresponding support ribs 13 along the construction piles 2 until the mesh 4 covers the entire designated area. During actual construction, due to the highly sculptural nature of PET mesh, the mesh 4 area will need to be 10% larger than the intended installation area.

[0054] Step 5: At the mesh 4 position, spray the first layer of concrete from top to bottom, ensuring that the concrete completely covers the mesh 4. After the first layer of concrete has solidified, spray the second layer of concrete. Ensure that the mesh structure is completely covered with no exposed structure. Allow the sprayed concrete to set for 2 hours before curing, with a total curing time of at least 14 days.

[0055] The present invention is not limited to the above-mentioned specific implementation manners. For ordinary technicians in this field, various changes made based on the above-mentioned conception without creative work are all within the scope of protection of the present invention.

Claims

1. A mesh component for SMW pile construction method, characterized in that: It includes a through rod, a sleeve and a supporting rib. The sleeve is sleeved on the surface of the through rod. The supporting rib is located in the middle of the through rod. The supporting rib is wrapped around the sleeve. The two free ends of the supporting rib are respectively located obliquely above and below the same side of the through rod. The lower free end of the supporting rib is provided with an upward bending portion.

2. The mesh component for SMW pile construction method according to claim 1, characterized in that: The sleeve is an open sleeve with a C-shaped cross section.

3. The mesh member for SMW pile construction method according to claim 1, characterized in that: A friction reducer is provided between the inner wall of the sleeve and the outer wall of the through rod.

4. The mesh member for SMW pile construction method according to claim 1, characterized in that: There are three sleeves, including two end sleeves and a middle sleeve. The middle sleeve is sleeved in the middle of the through rod, and the two end sleeves are correspondingly sleeved at both ends of the through rod. There is a distance between adjacent sleeves, and the support rib is located in the middle position of the middle sleeve.

5. A SMW pile enclosure structure, comprising a pile, an H-shaped steel, a hanging net, and a hanging net component; the H-shaped steel is inserted into the pile, and the hanging net is hung on the pile near the foundation pit through the hanging net component, characterized in that: The mesh hanging component adopts the mesh hanging component according to any one of claims 1 to 5.

6. The SMW pile retaining structure according to claim 5, characterized in that: A horizontal notch is provided vertically at regular intervals along the upper side of the cement mixing pile between the webs of two adjacent H-shaped steels.

7. The SMW pile retaining structure according to claim 6, characterized in that: The mesh component, except for the two free ends, is arranged in the groove of the construction pile and is fixed by grouting in the groove. The mesh component does not directly contact the H-shaped steel.

8. The SMW pile retaining structure according to claim 6, characterized in that: The spacing between the hook grooves of the lower end curved portions of two upper and lower adjacent support ribs is adapted to the spacing between two transverse ribs of the hanging net.

9. The SMW pile retaining structure according to claim 8, characterized in that: The hanging net is a PET hanging net, a transverse rib of the hanging net is hung in the hook groove of the lower end bending part of the supporting rib, and another transverse rib above the transverse rib is hung on the upper free end of the supporting rib.

10. A construction method of an SMW pile retaining structure according to claim 5, characterized in that: The following steps are involved: Step 1: To construct SWM piles, first use a mixer to drill into the soil. After the mixing head sinks to the designed elevation, start the mortar pump to press the mixed cement slurry into the soil. Insert H-shaped steel before the cement soil begins to set. Before insertion, the position should be corrected and a guide device should be set up to ensure verticality; Step 2: After the SWM piles reach the designed strength, a horizontal notch is opened vertically on the cement mixing piles between adjacent H-steels at regular intervals, and the notch length is ensured to be no less than the length of the mesh member. Step 3: implant the mesh components into the slots one by one, and inject grout into the slots to fix the mesh components; Step 4: Connect one side of the customized hanging net to the hanging net component first, and then fix the hanging net along the construction piles in sequence to cover the entire set area; Step 5: Spray the first layer of concrete from top to bottom. The concrete coverage must completely include the mesh. After the surface of the first layer of concrete has initially solidified, spray the second layer of concrete. The second layer of concrete must ensure that the mesh structure is completely covered without any exposed structure. The shotcrete is cured after a certain period of final setting.

Images