CN-121992786-A - Sand gravel foundation spillway concrete joint seepage-proofing construction method

CN121992786ACN 121992786 ACN121992786 ACN 121992786ACN-121992786-A

Abstract

The application relates to the technical field of spillway pouring construction, and provides a spillway concrete slit seepage-proofing construction method for a sand gravel foundation, aiming at the problem that a water polyethylene foam board at a traditional spillway slit cannot be aligned with a water stop copper sheet nose groove, comprising the following steps of S1, binding a reinforcing steel bar structure on a spillway pouring station; the method comprises the steps of S2, lengthening a water stop copper sheet, supporting the water stop copper sheet on one side of a pouring station of a spillway module, enabling a nose groove of the water stop copper sheet to be located at a parting joint of the spillway module, S3, supporting polyethylene foam plates on two sides of the top and bottom of the nose groove of the water stop copper sheet, S4, supporting side templates on the periphery of the pouring station of the spillway module to form a pouring die cavity in a surrounding mode, S5, pouring concrete to form the spillway module, and S6, removing the templates, namely removing the side templates on the periphery of the spillway module. The application has the effect of keeping the polyethylene foam board and the water stop steel sheet nose groove centered.

Inventors

LIU XIANGMING
SHAN XIN
YANG BO
LIU ZHEN
PENG WEIPING
XIAO HUI
LI CHANGHONG
TAN YONGJUN
LUO JIANGUO
LIU DONG

Assignees

广东省建筑工程集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20260206

Claims (10)

1. A sand gravel foundation spillway concrete parting seepage-proofing construction method is characterized by comprising the following steps: s1, constructing a reinforced structure (1), namely binding the reinforced structure (1) on a spillway pouring station; S2, installing a water stop copper sheet (2), namely lengthening the water stop copper sheet (2), supporting the water stop copper sheet (2) on one side of a pouring station of the spillway module, and enabling a nose groove (20) of the water stop copper sheet (2) to be positioned at a parting joint of the spillway module; S3, mounting a polyethylene foam board (3), namely supporting the polyethylene foam board (3) on the two sides of the top and the bottom of a nose groove (20) of the water stop copper sheet (2); S4, supporting a template, namely supporting a side template (4) on the periphery of a pouring station of the overflow channel module so as to form a pouring die cavity in a surrounding manner; s5, pouring concrete to form an spillway module; And S6, removing the template, namely removing the side template (4) on the periphery of the overflow channel module.
2. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 1, wherein in the step S2, after the water-stop copper sheet (2) is supported, SR plastic filler is filled and poured in a nose groove (20) of the water-stop copper sheet (2) to form a filler layer (30).
3. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 2, wherein in the step S3, when a polyethylene foam plate (3) positioned at the upper part of a nose groove (20) of a water-stopping copper sheet (2) is installed, the bottom end of the polyethylene foam plate (3) is embedded into the nose groove (20) of the water-stopping copper sheet (2) and is adhered and fixed with an uncured SR plastic filler; When the polyethylene foam board (3) positioned at the lower part of the water stop copper sheet (2) nose groove (20) is installed, a positioning groove matched with the water stop copper sheet (2) nose groove (20) is formed in the top of the polyethylene foam board (3), and the positioning groove at the top of the polyethylene foam board (3) is clamped into the bottom of the water stop copper sheet (2) nose groove (20).
4. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 1, wherein in the step S2, when the water stop copper sheet (2) is installed, a plurality of brackets (22) are welded at the bottom of a wing plate on one side of the water stop copper sheet (2), and the bottoms of the brackets (22) are fixed at the bottom of a spillway module pouring station.
5. The method for the slit seepage-proofing construction of the sand gravel foundation spillway concrete is characterized in that in the step S3, before the polyethylene foam board (3) is installed, a plurality of limiting pieces (21) are supported at one side of a spillway module pouring station towards a water-stop copper sheet (2), wherein the limiting pieces (21) comprise supporting rods (211) which are vertically arranged, and the supporting rods (211) are vertically connected with two connecting screws (213); When the limiting piece (21) is installed, the supporting rod (211) is fixed on a pouring station bottom plate of the spillway module, and two connecting screws (213) are respectively positioned at the top and the bottom of the water stop copper sheet (2); When the polyethylene foam board (3) is installed, two connecting screws (213) are respectively penetrated through the polyethylene foam board (3) at the two sides of the top and bottom of the water stop copper sheet (2); in the step S4, when the side templates (4) are supported, two connecting screws (213) are penetrated through the opposite side templates (4), and a sealing washer (216) and a limit nut (217) are sleeved at the tail ends of the connecting screws (213); in step S6, when the side template (4) is removed, the sealing gasket (216) and the limit nut (217) are removed from the tail end of the connecting screw (213) and the side template (4) is removed, and after the side template (4) is removed, the sealing gasket (216) and the limit nut (217) are mounted to the tail end of the connecting screw (213) again so as to limit the polyethylene foam board (3).
6. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 5, wherein the periphery of the connecting screw (213) is sleeved with an annular limiting plate (215); in step S3, when the polyethylene foam board (3) is mounted, the polyethylene foam board (3) is brought into contact with the annular limiting plate (215).
7. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 6, wherein the supporting rods (211) are connected with threaded sleeves (214) corresponding to the connecting screw rods (213), and the connecting screw rods (213) are in threaded connection with the threaded sleeves (214); In step S3, when the polyethylene foam board (3) is mounted, the connecting screw (213) is inserted into the polyethylene foam board (3), and then the connecting screw (213) is rotated so that the annular limiting plate (215) is abutted against the corresponding polyethylene foam board (3).
8. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete is characterized in that the side templates (4) are formed with accommodating grooves (40) corresponding to the water-stopping copper sheets (2), and the accommodating grooves (40) are used for enabling the wing plates of the water-stopping copper sheets (2) to extend in; In the step S4, when the side template (4) is supported on one side of the spillway module, which is provided with the water stop copper sheet (2), the wing plate of the water stop copper sheet (2) extending out of the spillway module is embedded into the accommodating groove (40) of the side template (4).
9. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 1, wherein in the step S5, concrete is poured, and the concrete pouring method comprises the following specific steps of: S5.1, concrete is poured for the first time, namely, after the concrete is poured to the bottom of the wing plate of the water stop copper sheet (2), the concrete is vibrated; And S5.2, secondary concrete pouring, namely, pouring the concrete again until the designed elevation of the overflow channel module is reached, and vibrating the concrete.
10. The method for the split seepage-proofing construction of the sand gravel foundation spillway concrete according to claim 1, wherein in the step S2, when the water-stop copper sheets (2) are subjected to lengthening processing, one end close to each other of the adjacent water-stop copper sheets (2) is lapped, and the lap joint of the adjacent water-stop copper sheets (2) is subjected to double-sided welding.

Description

Sand gravel foundation spillway concrete joint seepage-proofing construction method Technical Field The application relates to the technical field of spillway pouring construction, in particular to a sand gravel foundation spillway concrete slit seepage prevention construction method. Background The spillway is used as a key hydraulic building for guaranteeing engineering safety in water conservancy and hydropower engineering, and mainly has the functions of controlling water level, draining flood and the like. In order to reduce cracks caused by shrinkage of concrete and irregular settlement of a subsequent foundation, the spillway concrete structure is generally divided into a plurality of spillway modules in the pouring construction process, gaps are reserved between adjacent spillway modules to realize the seam separation treatment of the spillway structure, water-stop copper sheets are generally arranged between the adjacent spillway modules to limit leakage at the seam separation of the spillway modules, polyethylene foam plates are arranged on the two sides of the top and bottom of a nose groove of the water-stop copper sheets, and the water-stop copper sheets are matched with the polyethylene foam plates to form a water-stop and seepage-proof structure. At present, in actual construction, one side of a water-stop copper sheet is generally buried in a spillway pre-pouring module, a nose groove of the water-stop copper sheet is positioned at the parting, and after the spillway pre-pouring module is poured and a template is removed, polyethylene foam plates are installed at the top end and the bottom end of the nose groove of the water-stop copper sheet. In the actual construction process, the casting error of the cast-in-situ module of the spillway is extremely easy to cause incapability of aligning with the nose groove of the water stop copper sheet when the polyethylene foam board is installed, and the water stop effect of the water stop structure at the subsequent parting position is affected. Accordingly, there is room for improvement. Disclosure of Invention The application provides a sand gravel foundation spillway concrete parting seepage-proofing construction method, which aims to solve the problem that a water polyethylene foam board at a spillway parting cannot be aligned with a water stop copper sheet nose groove. The application provides a sand gravel foundation spillway concrete joint seepage-proofing construction method, which adopts the following technical scheme: a sand gravel foundation spillway concrete parting seepage-proofing construction method comprises the following steps: S1, constructing a reinforced structure, namely binding the reinforced structure on a pouring station of an overflow path; s2, installing a water-stop copper sheet, namely lengthening the water-stop copper sheet, supporting the water-stop copper sheet on one side of a pouring station of the spillway module, and enabling a nose groove of the water-stop copper sheet to be positioned at a parting joint of the spillway module; s3, mounting a polyethylene foam board, namely supporting the polyethylene foam board on the two sides of the top and bottom of the nose groove of the water stop copper sheet; S4, supporting a template, namely supporting a side template on the periphery of a pouring station of the overflow channel module so as to form a pouring die cavity in a surrounding manner; s5, pouring concrete to form an spillway module; and S6, removing the template, namely removing the side template at the periphery of the overflow channel module. Through adopting above-mentioned technical scheme, through before pouring the spillway module, install two polyethylene foam boards to stagnant water copper sheet nose groove top and bottom both sides, compare in traditional construction methods, be favorable to making two polyethylene foam boards accurately be located the nose groove department of stagnant water copper sheet, effectively avoid concrete pouring in-process because of influence such as pouring error, lead to the polyethylene foam board unable to aim at stagnant water copper sheet nose groove, influence the circumstances of stagnant water effect of stagnant water structure. Preferably, in step S2, after the water-stop copper sheet is supported, the nose groove of the water-stop copper sheet is filled with SR plastic filler to form a filler layer. Through adopting above-mentioned technical scheme, on the one hand, be favorable to filling the shutoff to the nose groove of stagnant water copper sheet through SR plastic filler filled packing layer, in the restriction follow-up spillway concrete placement process, the concrete enters into the nose inslot, influences the normal adaptation deformation's of stagnant water copper sheet nose groove structure condition, on the other hand, usable SR plastic filler self characteristic improves the deformation adaptability to the nose groove of stagnant water copper sheet.